Help categorize the TRS-80 software archive

PELMANISM - A COMPUTER VERSION OF THE CARD GAME Essentially the object of the card game PELMANISM is for the player to remember the position of the cards so that when a subsequent card is turned over he may match it. The computer version is a very good simulation of the original and essentially amounts to the same thing. When first started, the program displays the cards on the screen. The player or players select cards from various positions which are displayed and the player must remember what they are. They are then covered by the computer and another turn is taken. When the player thinks he can remember a match, he can 'call it' and see whether or not he is correct. The player with the most pairs at the end wins. PELMANISM is an easy game to play, ideal for some of the younger members of the family. Understandably, a strong 'gambling' element may be introduced if the players so decide. Memory Requirement 16k TRS-80 Tape Model 1 & 3 11-2626

Announcing NEW PEN BASIC by Steve Bjork Steve is one of the Best Assembly Lang. pro- grammers around, and he has come up with PEN BASIC. This low memory routine will add 10 more com- mands to Level II such as PENGET which searches the entire screen for the pen and returns a number between 0-1024 in about 1 sec. Plus 9 other commands. Perfect for you lightware authors and NEW light pen owners too! only $14.95 (COUPON) Micro Matrix P.O. Box 938 Pacifica, CA 94044

NEW PEN737 FINALLY - THE ULTIMATE IN WORD PROCESSING FROM COMPUTEX Superscripts / Subscripts / Underlines / Elongated printing / BOLD face type and many other features can now be accomplished with your TRS80 computer, Electric Pencil, Centronics 737 Printer and our new PEN737 program. PEN737 program (available on disk or cassette) $29.95 When purchased with Centronics 737 printer $19.95 TRS80 is a registered trade mark of Radio Shack Certified Checks, Money Orders Or call to arrange direct wire transfer Visa and Mastercharge accepted, add 4% to order. Personal or company checks require 2 weeks to clear COMPUTEX 15502 Highway 3, Suite 715 Webster, Texas 77598 (713) 488-8022

PENCIL FIX - Modify Pencil to use RS lower case modification. Redefines control key to be the @ key and switches the lc/uc toggle to the shifted Break key. Save your warranty. Disk $ 14.95 TULSA MICRO SYSTEMS 114 West Taft Sapulpa, Ok. 74066 (918) 224-4260

PENCIL/PAL: L II, 32K Disk $34.95 INTRODUCTION - PENCIL/PAL is a form letter generator. This means that repetitious correspondence or form letters may be automatically printed and addressed to a list of recipients. The list of recipients is in the form of a file of addresses. Each name and address is then automatically 'merged' with the body of the letter, such that the inside address and greeting appear as though they were typed individually. This effect, of course is enhanced if a 'letter-quality' printer is employed. FEATURES - A - Address files and letter files are entered using the easy-to-use Electric Pencil word processing system (TRS-80 disk version available for $150). This means that entering information into your address file and typing your letters are accomplished with the utmost ease. The Electric Pencil has the reputation of being the easiest to use of all the available word processors (Creative Computing. October, 1979). B - There are no limits to the size of your address 'fields'. C - Your letter's greeting may be to 'Dear Joe:' D - An additional line is allowed in your address file, which will not appear on the letter for a phone number or a custom code of your choice. E - One or two 'select codes', consisting of any string of characters. F - If continuous forms used (services are available which attach your letter head to continuous forms) on the printer, a letter to each of the addresses in the file may be produced without operator intervention. G - Lower-case is supported. H - Labels (any size) or envelopes may be automatically printed. SYSTEM REQUIREMENTS The following is a list of the minimal hardware and software that is required to operate the PENCIL/PAL form letter generating system. HARDWARE TRS-80 Level II Microcomputer System w/16K RAM, Radio Shack Expansion Interface w/16K RAM, 1 Disk Drive, Printer (parallel or serial RS232), Lower case modification kit. SOFTWARE TRSDOS 2.2 or NEWDOS+ (recommended), Disk Basic 1.1, Electric Pencil (disk version).

PENCIL/PAL: L II, 32K Disk $34.95 INTRODUCTION - PENCIL/PAL is a form letter generator. This means that repetitious correspondence or form letters may be automatically printed and addressed to a list of recipients. The list of recipients is in the form of a file of addresses. Each name and address is then automatically 'merged' with the body of the letter, such that the inside address and greeting appear as though they were typed individually. This effect, of course is enhanced if a 'letter-quality' printer is employed. FEATURES - A - Address files and letter files are entered using the easy-to-use Electric Pencil word processing system (TRS-80 disk version available for $150). This means that entering information into your address file and typing your letters are accomplished with the utmost ease. The Electric Pencil has the reputation of being the easiest to use of all the available word processors (Creative Computing. October, 1979). B - There are no limits to the size of your address 'fields'. C - Your letter's greeting may be to 'Dear Joe:' D - An additional line is allowed in your address file, which will not appear on the letter for a phone number or a custom code of your choice. E - One or two 'select codes', consisting of any string of characters. F - If continuous forms used (services are available which attach your letter head to continuous forms) on the printer, a letter to each of the addresses in the file may be produced without operator intervention. G - Lower-case is supported. H - Labels (any size) or envelopes may be automatically printed. SYSTEM REQUIREMENTS The following is a list of the minimal hardware and software that is required to operate the PENCIL/PAL form letter generating system. HARDWARE TRS-80 Level II Microcomputer System w/16K RAM, Radio Shack Expansion Interface w/16K RAM, 1 Disk Drive, Printer (parallel or serial RS232), Lower case modification kit. SOFTWARE TRSDOS 2.2 or NEWDOS+ (recommended), Disk Basic 1.1, Electric Pencil (disk version).

PENCIL PATCH $19.95 Fixes the Electric Pencil Model 1 version so that it runs on the Model 3. (You must already own the Model 1 version.) HOWE SOFTWARE 14 Lexington Road, New City, NY 10956 TRS-80 is a registered trademark of the Radio Shack division of Tandy Corp.

PENCIL-PLUS This is an example of PENCIL-PLUS used with Electric Pencil 2.0., PENCIL-PLUS permits writers to embed printer codes while maintaining the proper line length with boldface, emphasized, double-strike or different type fonts---even in headers. With the PENCIL-PLUS enhancement, right justification can be maintained, even with embedded printer codes. Format parameters can be altered by including format lines in the text. Margins, line lengths, line spacing and right justification may also be changed. For this paragraph, the margin was set at 16 and the line length at 43 with double spacing. PENCIL-PLUS supports non-printing comment lines. Expanded fonts will be retained, line after line, until reset by another code in the text, and will not revert to normal width at the end of each line on the MX-80. Compressed fonts will also be maintained from one line to the next until turned off by a print code in the text. The left margin will be maintained evenly, regardless of the type font being employed. Compressed-expanded combinations will print line after line. PENCIL-PLUS supports mix-and-match combinations: Normal expanded-compressed compressed expanded boldface. Characters not on the keyboard may be sent to the printer, such as ()( )( )( )( )( )( )( )( )( )( )( )( )( )( )( )( )( )( )( )( )( )( )( )( )( )( )( )( )( )( )( )( )( )( ) Text may be entered from the keyboard during printout, prompted by your own message on the screen, and may contain up to 255 characters. Keyboard text will respect line and page lengths, headers and page numbers and will be right-justified if that option was selected. This text is from the keyboard, and may be up to 255 characters in length. Files may be chained for printing, and will retain the current header, line count and page numbering. This is the last line in Sample1/PCL. This is the first line of Sample2/PCL. Conditional hyphens are supported with PENCIL-PLUS, and will print only if the word must be broken at the end of a line. Try printing the following line with different spacing at it's beginning: This sentence is just one example of the use of conditional hyphens during printing. Boilerplate paragraphs may be inserted into the text, permitting standard paragraphs to be printed without repetitive typing. The following paragraph comes from Sample4/PCL: This is a test of a BOILERPLATE paragraph. It can be written as a portion of a file and then loaded by a command included within a format line. The Boilerplate paragraph will be printed up to the first carriage-return and then printing will resume at the place where it left off in the original text. The file containing the Boilerplate paragraph may contain many standard paragraphs. The selection may be made by prefixing each boilerplate paragraph with a line which contains a three digit number followed by an asterisk and a carriage return. The boilerplate command in the text will begin with the format sign immediately followed by the filename containing the boilerplate paragraph. If no file extension is used, it will be assumed as '/PCL'. After the filename will be an equals sign and then the three-digit code terminated by a carriage return. PENCIL-PLUS also supports file-merge. The merged files may be of variable length, using the field names which you select and may themselves be created using PENCIL-PLUS. Line length and right justification will be maintained with even variable-length fields, and data may be inserted from the keyboard to replace variable data within a line. Chained, boilerplate and merge files all recognize a default file extension of '/PCL.' PENCIL-PLUS is written to work with a standard copy of Electric Pencil 2.0, using your own printer's control codes. All changes have been made internally so that the size of the text buffer is not reduced, and the original program's ease of operation has been retained.

Adapt tape Pencil for RS-232-C.

Super Operating Systems PENDOS and DOSMOD are TRSDOS 2.3 operating system enhancement programs. These programs virtually eliminate typing when working in the DOS environment. With these programs, you can copy, kill, list or print any non-passworded file in your system without typing a single command or filespec. However, you must type passwords to access passworded files. With PENDOS you select the desired DOS commands or filespecs with a light pen by touching the spot of light on the display corresponding to the function desired. With DOSMOD you select the commands or filespecs by positioning a blinking cursor adjacent to the desired function and pressing the Enter key. These programs were designed as new overlays to DOS as opposed to high memory resident routines. This avoids unwanted interaction with other programs. These programs will not conflict with any other programs that start at 5200H or higher. They will work with all memory sizes of TRS-80s. These programs are available from Clockwork Software, P.O. Box 704, Colorado Springs, CO 80901, for $25 shipping and handling included. The light pen required for operation of PENDOS is also available for $25.

PENETRATOR Actual TR580 screen 'Penetrator is a state-of-the-art game. You are the sole survivor of a fighter squadron whose mission is to make it through four defense rings and blow up an illegal cache of neutron bombs. The landscape is as treacherous as your enemies this is where the best feature of Penetrator comes in: You make custom landscapes to suit your ability remove difficult areas and add or subtract missiles and radar bases. 'Another good feature is the training mode The sound is great Penetrator is a very well done game program and worth the asking price.' Penetrator is joystick compatible and includes a color booklet. Available as: 16K TR5 Model I/III, two-cassette pack 26518 $24.95 32K TR5 Model I/III protected diskette 26710 $24.95 Melbourne House Software Inc., Dept. CS. 347 Reedwood Drive, Nashville, TN 37217.

PENETRATOR Actual TR580 screen 'Penetrator is a state-of-the-art game. You are the sole survivor of a fighter squadron whose mission is to make it through four defense rings and blow up an illegal cache of neutron bombs. The landscape is as treacherous as your enemies this is where the best feature of Penetrator comes in: You make custom landscapes to suit your ability remove difficult areas and add or subtract missiles and radar bases. 'Another good feature is the training mode The sound is great Penetrator is a very well done game program and worth the asking price.' Penetrator is joystick compatible and includes a color booklet. Available as: 16K TR5 Model I/III, two-cassette pack 26518 $24.95 32K TR5 Model I/III protected diskette 26710 $24.95 Melbourne House Software Inc., Dept. CS. 347 Reedwood Drive, Nashville, TN 37217.

PENETRATOR Actual TR580 screen 'Penetrator is a state-of-the-art game. You are the sole survivor of a fighter squadron whose mission is to make it through four defense rings and blow up an illegal cache of neutron bombs. The landscape is as treacherous as your enemies this is where the best feature of Penetrator comes in: You make custom landscapes to suit your ability remove difficult areas and add or subtract missiles and radar bases. 'Another good feature is the training mode The sound is great Penetrator is a very well done game program and worth the asking price.' Penetrator is joystick compatible and includes a color booklet. Available as: 16K TR5 Model I/III, two-cassette pack 26518 $24.95 32K TR5 Model I/III protected diskette 26710 $24.95 Melbourne House Software Inc., Dept. CS. 347 Reedwood Drive, Nashville, TN 37217.

PENETRATOR Actual TR580 screen 'Penetrator is a state-of-the-art game. You are the sole survivor of a fighter squadron whose mission is to make it through four defense rings and blow up an illegal cache of neutron bombs. The landscape is as treacherous as your enemies this is where the best feature of Penetrator comes in: You make custom landscapes to suit your ability remove difficult areas and add or subtract missiles and radar bases. 'Another good feature is the training mode The sound is great Penetrator is a very well done game program and worth the asking price.' Penetrator is joystick compatible and includes a color booklet. Available as: 16K TR5 Model I/III, two-cassette pack 26518 $24.95 32K TR5 Model I/III protected diskette 26710 $24.95 Melbourne House Software Inc., Dept. CS. 347 Reedwood Drive, Nashville, TN 37217.

PENETRATOR Actual TR580 screen 'Penetrator is a state-of-the-art game. You are the sole survivor of a fighter squadron whose mission is to make it through four defense rings and blow up an illegal cache of neutron bombs. The landscape is as treacherous as your enemies this is where the best feature of Penetrator comes in: You make custom landscapes to suit your ability remove difficult areas and add or subtract missiles and radar bases. 'Another good feature is the training mode The sound is great Penetrator is a very well done game program and worth the asking price.' Penetrator is joystick compatible and includes a color booklet. Available as: 16K TR5 Model I/III, two-cassette pack 26518 $24.95 32K TR5 Model I/III protected diskette 26710 $24.95 Melbourne House Software Inc., Dept. CS. 347 Reedwood Drive, Nashville, TN 37217.

PENETRATOR Actual TR580 screen 'Penetrator is a state-of-the-art game. You are the sole survivor of a fighter squadron whose mission is to make it through four defense rings and blow up an illegal cache of neutron bombs. The landscape is as treacherous as your enemies this is where the best feature of Penetrator comes in: You make custom landscapes to suit your ability remove difficult areas and add or subtract missiles and radar bases. 'Another good feature is the training mode The sound is great Penetrator is a very well done game program and worth the asking price.' Penetrator is joystick compatible and includes a color booklet. Available as: 16K TR5 Model I/III, two-cassette pack 26518 $24.95 32K TR5 Model I/III protected diskette 26710 $24.95 Melbourne House Software Inc., Dept. CS. 347 Reedwood Drive, Nashville, TN 37217.

PENETRATOR Actual TR580 screen 'Penetrator is a state-of-the-art game. You are the sole survivor of a fighter squadron whose mission is to make it through four defense rings and blow up an illegal cache of neutron bombs. The landscape is as treacherous as your enemies this is where the best feature of Penetrator comes in: You make custom landscapes to suit your ability remove difficult areas and add or subtract missiles and radar bases. 'Another good feature is the training mode The sound is great Penetrator is a very well done game program and worth the asking price.' Penetrator is joystick compatible and includes a color booklet. Available as: 16K TR5 Model I/III, two-cassette pack 26518 $24.95 32K TR5 Model I/III protected diskette 26710 $24.95 Melbourne House Software Inc., Dept. CS. 347 Reedwood Drive, Nashville, TN 37217.

PENETRATOR Actual TR580 screen 'Penetrator is a state-of-the-art game. You are the sole survivor of a fighter squadron whose mission is to make it through four defense rings and blow up an illegal cache of neutron bombs. The landscape is as treacherous as your enemies this is where the best feature of Penetrator comes in: You make custom landscapes to suit your ability remove difficult areas and add or subtract missiles and radar bases. 'Another good feature is the training mode The sound is great Penetrator is a very well done game program and worth the asking price.' Penetrator is joystick compatible and includes a color booklet. Available as: 16K TR5 Model I/III, two-cassette pack 26518 $24.95 32K TR5 Model I/III protected diskette 26710 $24.95 Melbourne House Software Inc., Dept. CS. 347 Reedwood Drive, Nashville, TN 37217.

Announcing PENETRATOR - the fastest and most exciting game ever developed for the TRS80 PENETRATOR features amazingly fast firing action; accurate bomb release, incredibly smooth graphics and arcade type sound that you have never before seen or heard on a TRS80! Your mission is to penetrate the enemy defenses, blow up their illegal neutron bomb store and return safely to base - an almost impossible feat! The console above shows the actual view from your TRS80. The four stages present continually new challenges, and increasing enemy defense means each stage is more difficult than the previous one! Enemy radar stations constantly track your movements unless you destroy them. You will need all your skill and cunning! To aid you on your mission, Control Center has provided you with a Training Simulation Chamber, where you may practice your skills in any of the stages before risking your life. PENETRATOR is a game that will challenge you time after time, hour after hour. The unique customizing feature allows you to change the conditions of the game at will. This means that each PENETRATOR package actually contains hundreds of different games to keep you challenged and stimulated. Don't wait any longer - PENETRATOR is available from your favorite software dealer or directly from the publishers. PENETRATOR includes a 16 page booklet and is compatible with the Alpha joystick. Available as: . 18K TRS Model I/III, two-cassette pack $24.95 . 32K TRS Model I/III protected diskette $24.95 Please add $1.50 per order for shipping, foreign orders add $6.00. California residents please add 6% sales tax. Visa, Mastercharge accepted. Dealer Enquiries Welcomed. TRS is a trademark of the Taraly Corporation. Melbourne House Software 6917 Valjean Avenue, Van Nuys, CA 91406.

PENETRATOR Actual TR580 screen 'Penetrator is a state-of-the-art game. You are the sole survivor of a fighter squadron whose mission is to make it through four defense rings and blow up an illegal cache of neutron bombs. The landscape is as treacherous as your enemies this is where the best feature of Penetrator comes in: You make custom landscapes to suit your ability remove difficult areas and add or subtract missiles and radar bases. 'Another good feature is the training mode The sound is great Penetrator is a very well done game program and worth the asking price.' Penetrator is joystick compatible and includes a color booklet. Available as: 16K TR5 Model I/III, two-cassette pack 26518 $24.95 32K TR5 Model I/III protected diskette 26710 $24.95 Melbourne House Software Inc., Dept. CS. 347 Reedwood Drive, Nashville, TN 37217.

PENETRATOR Actual TR580 screen 'Penetrator is a state-of-the-art game. You are the sole survivor of a fighter squadron whose mission is to make it through four defense rings and blow up an illegal cache of neutron bombs. The landscape is as treacherous as your enemies this is where the best feature of Penetrator comes in: You make custom landscapes to suit your ability remove difficult areas and add or subtract missiles and radar bases. 'Another good feature is the training mode The sound is great Penetrator is a very well done game program and worth the asking price.' Penetrator is joystick compatible and includes a color booklet. Available as: 16K TR5 Model I/III, two-cassette pack 26518 $24.95 32K TR5 Model I/III protected diskette 26710 $24.95 Melbourne House Software Inc., Dept. CS. 347 Reedwood Drive, Nashville, TN 37217.

PENETRATOR Actual TR580 screen 'Penetrator is a state-of-the-art game. You are the sole survivor of a fighter squadron whose mission is to make it through four defense rings and blow up an illegal cache of neutron bombs. The landscape is as treacherous as your enemies this is where the best feature of Penetrator comes in: You make custom landscapes to suit your ability remove difficult areas and add or subtract missiles and radar bases. 'Another good feature is the training mode The sound is great Penetrator is a very well done game program and worth the asking price.' Penetrator is joystick compatible and includes a color booklet. Available as: 16K TR5 Model I/III, two-cassette pack 26518 $24.95 32K TR5 Model I/III protected diskette 26710 $24.95 Melbourne House Software Inc., Dept. CS. 347 Reedwood Drive, Nashville, TN 37217.

PENETRATOR Actual TR580 screen 'Penetrator is a state-of-the-art game. You are the sole survivor of a fighter squadron whose mission is to make it through four defense rings and blow up an illegal cache of neutron bombs. The landscape is as treacherous as your enemies this is where the best feature of Penetrator comes in: You make custom landscapes to suit your ability remove difficult areas and add or subtract missiles and radar bases. 'Another good feature is the training mode The sound is great Penetrator is a very well done game program and worth the asking price.' Penetrator is joystick compatible and includes a color booklet. Available as: 16K TR5 Model I/III, two-cassette pack 26518 $24.95 32K TR5 Model I/III protected diskette 26710 $24.95 Melbourne House Software Inc., Dept. CS. 347 Reedwood Drive, Nashville, TN 37217.

PENETRATOR Actual TR580 screen 'Penetrator is a state-of-the-art game. You are the sole survivor of a fighter squadron whose mission is to make it through four defense rings and blow up an illegal cache of neutron bombs. The landscape is as treacherous as your enemies this is where the best feature of Penetrator comes in: You make custom landscapes to suit your ability remove difficult areas and add or subtract missiles and radar bases. 'Another good feature is the training mode The sound is great Penetrator is a very well done game program and worth the asking price.' Penetrator is joystick compatible and includes a color booklet. Available as: 16K TR5 Model I/III, two-cassette pack 26518 $24.95 32K TR5 Model I/III protected diskette 26710 $24.95 Melbourne House Software Inc., Dept. CS. 347 Reedwood Drive, Nashville, TN 37217.

PENETRATOR Actual TR580 screen 'Penetrator is a state-of-the-art game. You are the sole survivor of a fighter squadron whose mission is to make it through four defense rings and blow up an illegal cache of neutron bombs. The landscape is as treacherous as your enemies this is where the best feature of Penetrator comes in: You make custom landscapes to suit your ability remove difficult areas and add or subtract missiles and radar bases. 'Another good feature is the training mode The sound is great Penetrator is a very well done game program and worth the asking price.' Penetrator is joystick compatible and includes a color booklet. Available as: 16K TR5 Model I/III, two-cassette pack 26518 $24.95 32K TR5 Model I/III protected diskette 26710 $24.95 Melbourne House Software Inc., Dept. CS. 347 Reedwood Drive, Nashville, TN 37217.

PENETRATOR Actual TR580 screen 'Penetrator is a state-of-the-art game. You are the sole survivor of a fighter squadron whose mission is to make it through four defense rings and blow up an illegal cache of neutron bombs. The landscape is as treacherous as your enemies this is where the best feature of Penetrator comes in: You make custom landscapes to suit your ability remove difficult areas and add or subtract missiles and radar bases. 'Another good feature is the training mode The sound is great Penetrator is a very well done game program and worth the asking price.' Penetrator is joystick compatible and includes a color booklet. Available as: 16K TR5 Model I/III, two-cassette pack 26518 $24.95 32K TR5 Model I/III protected diskette 26710 $24.95 Melbourne House Software Inc., Dept. CS. 347 Reedwood Drive, Nashville, TN 37217.

PENETRATOR Actual TR580 screen 'Penetrator is a state-of-the-art game. You are the sole survivor of a fighter squadron whose mission is to make it through four defense rings and blow up an illegal cache of neutron bombs. The landscape is as treacherous as your enemies this is where the best feature of Penetrator comes in: You make custom landscapes to suit your ability remove difficult areas and add or subtract missiles and radar bases. 'Another good feature is the training mode The sound is great Penetrator is a very well done game program and worth the asking price.' Penetrator is joystick compatible and includes a color booklet. Available as: 16K TR5 Model I/III, two-cassette pack 26518 $24.95 32K TR5 Model I/III protected diskette 26710 $24.95 Melbourne House Software Inc., Dept. CS. 347 Reedwood Drive, Nashville, TN 37217.

PENETRATOR Actual TR580 screen 'Penetrator is a state-of-the-art game. You are the sole survivor of a fighter squadron whose mission is to make it through four defense rings and blow up an illegal cache of neutron bombs. The landscape is as treacherous as your enemies this is where the best feature of Penetrator comes in: You make custom landscapes to suit your ability remove difficult areas and add or subtract missiles and radar bases. 'Another good feature is the training mode The sound is great Penetrator is a very well done game program and worth the asking price.' Penetrator is joystick compatible and includes a color booklet. Available as: 16K TR5 Model I/III, two-cassette pack 26518 $24.95 32K TR5 Model I/III protected diskette 26710 $24.95 Melbourne House Software Inc., Dept. CS. 347 Reedwood Drive, Nashville, TN 37217.

PENGUIN by Dubois and McNamara from Displayed Video Over 30 different mazes of ice blocks. Kick the obstructing blocks and watch them slide or crumble. Survive with threatening ice monsters chasing you. Watch out - they increase in numbers and get smarter with each frame. Keyboard or joystick controlled. 33983 16K Tape $15.95 $13.56 30711 16K Disk $19.95 $16.96

PENGUIN by Dubois and McNamara from Displayed Video Over 30 different mazes of ice blocks. Kick the obstructing blocks and watch them slide or crumble. Survive with threatening ice monsters chasing you. Watch out - they increase in numbers and get smarter with each frame. Keyboard or joystick controlled. 33983 16K Tape $15.95 $13.56 30711 16K Disk $19.95 $16.96

EDIT BASIC PROGRAMS WITH ELECTRIC PENCIL Load Basic programs or any other ASCII data file into the disk version of Electric Pencil for editing. One command from DOS quickly modifies existing files to Pencil format. One disk and 32K required. PENPATCH $9.95 MUMFORD MICRO SYSTEMS

Appears in Issue 036 of 80 Microcomputing

Article Begins:

Those interested in modifying or extending PENRAM will need to know something of the program structure. Refer to the source code listing in Listing 1. PENRAM operates by keeping track of three important addresses, which will be referred to by the names of their storage locations (which are unimportant).

Appears in Issue 036 of 80 Microcomputing

Article Begins:

Those interested in modifying or extending PENRAM will need to know something of the program structure. Refer to the source code listing in Listing 1. PENRAM operates by keeping track of three important addresses, which will be referred to by the names of their storage locations (which are unimportant).

Appears in Issue 036 of 80 Microcomputing

Article Begins:

Those interested in modifying or extending PENRAM will need to know something of the program structure. Refer to the source code listing in Listing 1. PENRAM operates by keeping track of three important addresses, which will be referred to by the names of their storage locations (which are unimportant).

Software. For the 80s. Pensadyne Computer Services. The organization that has brought affordable software to hundreds of users in the over 40 of the United States and 16 countries around the world. The organization with the people, the support, the service and the expertise to bring you the highest quality products available. Pensa-write 1 -- Our BASIC word processing system for the owner who requires performance at low cost. Many of the features of more expensive word processing systems at a fraction of the cost. Comes complete with mailing list capable of handling 300 names. $19.95 (Specify Model I or Model III). Visa and Mastercharge orders welcome. Phone orders welcome or write, specifying system configuration, and product desired. Please add $1.00 for first class shipping. PENSADYNE -- Giving you the power to think. COMPUTER SERVICES 4441 WEST FIRST AVE. VANCOUVER, B.C., V6R 4H9 604-224-3107

Software. For the 80s. Pensadyne Computer Services. The organization that has brought affordable software to hundreds of users in the over 40 of the United States and 16 countries around the world. The organization with the people, the support, the service and the expertise to bring you the highest quality products available. Pensa-write 2 -- A machine language word processing system for the TRS-80 Model I or III with the power and speed that is really needed in a word processing environment. Word wrap around, unlimited insert and delete, block moves, chaining of files, 20 user definable commands, ASCII control code generation for printed output to allow subscripts, superscripts, underlining or any other feature your printer supports, and much more. All this in a package that costs just $79.95. Manual $10.00 Deductable. (See full page ad in April, 1981 80-Microcomputing for a full description). Visa and Mastercharge orders welcome. Phone orders welcome or write, specifying system configuration, and product desired. Please add $1.00 for first class shipping. PENSADYNE -- Giving you the power to think. COMPUTER SERVICES 4441 WEST FIRST AVE. VANCOUVER, B.C., V6R 4H9 604-224-3107

PENTOMINOES $ 9.95

PENTOMINO'S A Topologic Puzzle, With Sound Effects! by Solomon W. Golomb While dominoes are made by joining two squares together, pentominoes are made by joining five squares, i.e.: or There are twelve, each named after the letter it resembles. To win you must fit them together to form a larger, 60-square shape, such as a 6 x 10 rectangle - something like a jigsaw puzzle. Unlike jigsaw pieces, however, pentominoes can be flipped over as well as rotated. When you see that you have fallen into error you may remove pieces at will and try them elsewhere. Sounds easy? Sure it is - up until the last couple of pieces! An endless fascination for the dedicated puzzler. Top-notch graphics and sound effects. Level II, 16K - $9.95 TSE TRS-80 Software Exchange 17 BRIAR CLIFF DRIVE MILFORD NEW HAMPSHIRE 03055

PENTHOL MENTHOL by James Garon Endless fascination for the dedicated puzzler! Each pentomino is made up of five squares, and there are twelve shapes. You can rotate them, flip them over, remove pieces at will and try them elsewhere, but to win you must fit them together to form a larger, 60-square shape. Top notch graphics and SOUND EFFECTS. New low price! $7.95 Level II, 16K The Software Exchange 6 South Street Milford, NH 03055

THE LEAST EXPENSIVE PROGRAMS YOU CAN BUY. Up to 77 high-quality programs for TRS-80, only $8! THE $15.50 COMPILER: TINY PASCAL FOR TRS-80 At last your TRS-80 can run Pascal too! The Chung/Yuen 'tiny' Pascal is fully implemented for Level II TRS-80, 16K and up. You no longer need be left out of the growing group of Pascal users, because People's Pascal gives you everything you need to write structured Pascal programs: . tiny Pascal compiler . complete text editor for writing your programs . complete tiny Pascal monitor . sample Pascal programs . user's manual (TRS-80 Computing issue 1:4) People's Pascal is both a powerful, structured language and 'CPU expeditor'. People's Pascal programs execute at least four times faster than Basic, and often eight-times faster! Special functions open up the complete graphic capability of TRS-80. You now have the means to write those dazzling, impressive, high-speed graphics programs that are great for games, plotting, statistics, etc. For the serious computerist, side two of People's Pascal II (tape 6) contains a larger compiler and complete source to the compiler, written in Pascal! This means you can re-compile the compiler, making changes, adding features, etc. (but this will take at least 36K RAM and a solid knowledge of programming). With the complete People's Pascal operating system, you can save and load both source (Pascal) programs, and compiled programs, to or from cassette tape. This means that once you have de-bugged a program, you can save the P-code (compiled program) and thereafter, to run the program, you need only load the super-fast P-code. Here is a partial list of People's Pascal features: recursive procedure/functions for (loop) case if/then/else one-dimensional arrays write read constant repeat/until (loop) 'peek & poke' plot (graphics for TRS-80) DEALER INQUERIES INVITED People's Pascal 1 (tape 3) is written in Basic, implemented for TRS-80 by John Alexander of Berwick Australia. It compiles P codes more slowly and is harder to use than Pascal 2, but its P codes can be translated into Z80 native code and saved as System tapes. Pascal 2 requires that Pascal be resident at run time-Pascal 1 does not. Other People's Software tapes $8. TAPE 1 LEVEL 2 Mortgage calculations, Dow Jones Industrial, cash flow, inventory-change, California income tax, journal ledger (8K), loan amortization, perpetual calendar, bio rhythm, payroll, diet planning, speed reading, touch typing, sales receipt tally, decision maker, mail addressing, straight depreciation, double-declining depreciation, and revolving charge account. Also, math problems, queen, Star Trek I, number guessing, wheel of fortune, World War II bomber, rock-scissors-paper, seek, Star Trek II, Red Baron, mini-Trek, strategy, pilot, battleship, 'On A Snowy Evening', mastermind, tic-tac-toe, grand prix auto race, capitals, etch sketch, hangman. Total programs: 34; Level 1 version available: 24 programs. $8. $8. TAPE 2 Some Common Basic Programs (lev. 2) Fully documented in Some Common Basic Programs by Lon Poole & Mary Borchers (Osborne & Associates, 630 Bancroft way, Berkeley CA 94710-or from CIE-$12.50 postpaid from CIE, via UPS, CA residents add tax (to $13.25): Investment, future value regular deposits; regular deposits; regular withdrawals, initial, minim (for withdrawals); nominal interest, effective & earned-interest; depreciation rate, amount depreciation; salvage value; discount com'l paper; loan principal, regular & last payment, remaining balance, term-loan; mortgage amortization; greatest common denom.: integer prime factors; polygon area; triangle parts; analysis, operations two vectors; radian-degree., degree-radian conversion; coordinate, polar equation, functions plot; linear, curvilinear interpolation; Simpson's & trapezoidal rules, Gaussian quadrature integration; derivative. Side 2-quadratic equation, polynomial (Newton) & half-interval-search roots; trig polynomial; simultaneous equations; linear programming; matrix addition, subtraction; scalar multiplication, inversion; permutations & combinations; Mann-Whitney U test; mean, variance, standard deviation; geometric mean & deviation; binomial, Poisson, normal, Chi-square distribution; Chi-sq., student's T-distribution test; F-distribution; linear correlation coefficient; linear, multiple-linear, Nth order, geometric, exponential regression; system reliability; future projections; Federal withholding taxes; tax depreciation schedule; check writer; recipe cost; map check; day of week; days between two dates; anglo to metric; alphebitize. $8 TAPE 3 People's Pascal Development System 1 Pascal 1 compiler-program development system. $15.50. TAPE 4 LEVEL 1 Election returns, business percentage, ups and downs of business, index, inventory control, sales receipt tally, gas mileage, driving distance, mixed monthly sales report, payroll, annual earnings, speech recording aid, and double-declining depreciation. Also, math problems, cash register, chase, snoopy, commander-in-chief, Christmas graphic, air raid, balance scale, stock market, tic-tac-toe and On A Snowy Evening. $8. TAPE 5 LEVEL 2 Memory test, mortgage payments, tension breaker, lineprinter-screen & vice-versa utilities, Federal income tax, election returns, business percentage, vacation planner, car pool (disk), diet planning 2, mailing list (disk) and first aid. Also spelling bee, Star Trek 3, mind bender, tachistoscope, chase, common factor, klingon capture, spelling practice, Hamurati, animals, Snoopy, cryptogram, starship, ants, Yesterday, and Pilot (disk). Pilot is the language of computer-aided instruction (CAI). TAPE 6 People's Pascal 2 Pascal 2 compiler-program development system. $23.50. TAPE 7 LEVEL 2 Disassembler, Pilot, roster, dropout, memory loader, memory sort, inventory control, graph, land surveying, mixed monthly sales report, shopping list, diet planning 3, loan progress chart, hex-declimal conversion. Also Star Trek 4, states and capitals, battleships 2, spelling practice 2, number guessing, hangman 2, snark, slot machine, cipher, target, surround, adder, termites, lunar lander, multiplication exercise, five-in-a-row, Bastem, and write. A number after a program indicates there are other similar People's Software programs. Pilot is the same as the disk pilot on tape 5, except runs on 16K tape systems. $8. -CA Residents Add 6 per cent TAX ($8.45, $16.40 & 24.88). Quoted Prices INCLUDE $.50 Shipping- COMPUTER INFORMATION EXCHANGE Box 159, San Luis Rey CA 92068 (714) 757-4849

Level II Tapes 'Tiny' Pascal runs on any 16K Level II system, includes the programming structuring capabilities of full Pascal, but not data structuring. Able to compile Z-80 machine code, programs run about 5X faster than Level II Basic-graphics run eight times faster! Requires use of T-Bug (or Tape 7) and ETASM Tape 3, People's Pascal $19.95 All orders charge card, check or m.o. Calif. residents add 6 pct tax. Dealer inq. invited Overseas, add $1.50 per tape postage COMPUTER INFORMATION EXCHANGE Box 159 San Luis Rey CA 92068

Income tax: Two Systems PEOPLE's TAXMAN by SuperPIMx author Chick House will determine what forms are needed and request all necessary data, referring user to tax booklet page and paragraph. It then will print your completed forms, ready for signing. This is the program you would expect to get when you pay $190 or more (but would you really get it? You WOULD with People's Taxman). Of modular design, People's Taxman asks all questions needed for forms and holds this on disk and in memory, and then will print your forms, using any paper (even silvered, and thermal). Two tax-form transparencies are included-Form 1040 page 1 & 2. Sandwich anvansparency between your printout and any copying machine and pick your filled-out tax form from the copy tray. Fills out the following forms: Scheduals A, B, C, D, E, F, R, and RP; Form 1040, 2440, 2441, 2906, 3468, 3903, 4137, and 5695; as well as the worksheets for unemployment compensation and IRA. Additional transparencies are only $2 each. Distributed on cassette, for disk-versions Model 1 and 3 TRS-80s only, add $5.95 if you want it distributed on disk. ($31.75 CA). $29.95

PEOPLE'S SOFTWARE TAPE 10 prints out or displays what you need to know to fill out Form 1040 pages 1 & 2, Schedules A, B, C, and Form 5695 (energy credit). A complex of 11 modular programs called from a menu program, tape also contains a comprehensive checking-account system. Both programs are by Frank H. Marz of Delavan, WI, and together fill a C48-length tape. Both Tape 10 programs are for disk only, and have been specially formatted to automatically save to disk from tape. Forty-track DOS recommended, available for $10 from CIE. $10.95

THE LEAST EXPENSIVE PROGRAMS YOU CAN BUY. Up to 77 high-quality programs for TRS-80, only $8! THE $15.50 COMPILER: TINY PASCAL FOR TRS-80 At last your TRS-80 can run Pascal too! The Chung/Yuen 'tiny' Pascal is fully implemented for Level II TRS-80, 16K and up. You no longer need be left out of the growing group of Pascal users, because People's Pascal gives you everything you need to write structured Pascal programs: . tiny Pascal compiler . complete text editor for writing your programs . complete tiny Pascal monitor . sample Pascal programs . user's manual (TRS-80 Computing issue 1:4) People's Pascal is both a powerful, structured language and 'CPU expeditor'. People's Pascal programs execute at least four times faster than Basic, and often eight-times faster! Special functions open up the complete graphic capability of TRS-80. You now have the means to write those dazzling, impressive, high-speed graphics programs that are great for games, plotting, statistics, etc. For the serious computerist, side two of People's Pascal II (tape 6) contains a larger compiler and complete source to the compiler, written in Pascal! This means you can re-compile the compiler, making changes, adding features, etc. (but this will take at least 36K RAM and a solid knowledge of programming). With the complete People's Pascal operating system, you can save and load both source (Pascal) programs, and compiled programs, to or from cassette tape. This means that once you have de-bugged a program, you can save the P-code (compiled program) and thereafter, to run the program, you need only load the super-fast P-code. Here is a partial list of People's Pascal features: recursive procedure/functions for (loop) case if/then/else one-dimensional arrays write read constant repeat/until (loop) 'peek & poke' plot (graphics for TRS-80) DEALER INQUERIES INVITED People's Pascal 1 (tape 3) is written in Basic, implemented for TRS-80 by John Alexander of Berwick Australia. It compiles P codes more slowly and is harder to use than Pascal 2, but its P codes can be translated into Z80 native code and saved as System tapes. Pascal 2 requires that Pascal be resident at run time-Pascal 1 does not. Other People's Software tapes $8. TAPE 1 LEVEL 2 Mortgage calculations, Dow Jones Industrial, cash flow, inventory-change, California income tax, journal ledger (8K), loan amortization, perpetual calendar, bio rhythm, payroll, diet planning, speed reading, touch typing, sales receipt tally, decision maker, mail addressing, straight depreciation, double-declining depreciation, and revolving charge account. Also, math problems, queen, Star Trek I, number guessing, wheel of fortune, World War II bomber, rock-scissors-paper, seek, Star Trek II, Red Baron, mini-Trek, strategy, pilot, battleship, 'On A Snowy Evening', mastermind, tic-tac-toe, grand prix auto race, capitals, etch sketch, hangman. Total programs: 34; Level 1 version available: 24 programs. $8. $8. TAPE 2 Some Common Basic Programs (lev. 2) Fully documented in Some Common Basic Programs by Lon Poole & Mary Borchers (Osborne & Associates, 630 Bancroft way, Berkeley CA 94710-or from CIE-$12.50 postpaid from CIE, via UPS, CA residents add tax (to $13.25): Investment, future value regular deposits; regular deposits; regular withdrawals, initial, minim (for withdrawals); nominal interest, effective & earned-interest; depreciation rate, amount depreciation; salvage value; discount com'l paper; loan principal, regular & last payment, remaining balance, term-loan; mortgage amortization; greatest common denom.: integer prime factors; polygon area; triangle parts; analysis, operations two vectors; radian-degree., degree-radian conversion; coordinate, polar equation, functions plot; linear, curvilinear interpolation; Simpson's & trapezoidal rules, Gaussian quadrature integration; derivative. Side 2-quadratic equation, polynomial (Newton) & half-interval-search roots; trig polynomial; simultaneous equations; linear programming; matrix addition, subtraction; scalar multiplication, inversion; permutations & combinations; Mann-Whitney U test; mean, variance, standard deviation; geometric mean & deviation; binomial, Poisson, normal, Chi-square distribution; Chi-sq., student's T-distribution test; F-distribution; linear correlation coefficient; linear, multiple-linear, Nth order, geometric, exponential regression; system reliability; future projections; Federal withholding taxes; tax depreciation schedule; check writer; recipe cost; map check; day of week; days between two dates; anglo to metric; alphebitize. $8 TAPE 3 People's Pascal Development System 1 Pascal 1 compiler-program development system. $15.50. TAPE 4 LEVEL 1 Election returns, business percentage, ups and downs of business, index, inventory control, sales receipt tally, gas mileage, driving distance, mixed monthly sales report, payroll, annual earnings, speech recording aid, and double-declining depreciation. Also, math problems, cash register, chase, snoopy, commander-in-chief, Christmas graphic, air raid, balance scale, stock market, tic-tac-toe and On A Snowy Evening. $8. TAPE 5 LEVEL 2 Memory test, mortgage payments, tension breaker, lineprinter-screen & vice-versa utilities, Federal income tax, election returns, business percentage, vacation planner, car pool (disk), diet planning 2, mailing list (disk) and first aid. Also spelling bee, Star Trek 3, mind bender, tachistoscope, chase, common factor, klingon capture, spelling practice, Hamurati, animals, Snoopy, cryptogram, starship, ants, Yesterday, and Pilot (disk). Pilot is the language of computer-aided instruction (CAI). TAPE 6 People's Pascal 2 Pascal 2 compiler-program development system. $23.50. TAPE 7 LEVEL 2 Disassembler, Pilot, roster, dropout, memory loader, memory sort, inventory control, graph, land surveying, mixed monthly sales report, shopping list, diet planning 3, loan progress chart, hex-declimal conversion. Also Star Trek 4, states and capitals, battleships 2, spelling practice 2, number guessing, hangman 2, snark, slot machine, cipher, target, surround, adder, termites, lunar lander, multiplication exercise, five-in-a-row, Bastem, and write. A number after a program indicates there are other similar People's Software programs. Pilot is the same as the disk pilot on tape 5, except runs on 16K tape systems. $8. -CA Residents Add 6 per cent TAX ($8.45, $16.40 & 24.88). Quoted Prices INCLUDE $.50 Shipping- COMPUTER INFORMATION EXCHANGE Box 159, San Luis Rey CA 92068 (714) 757-4849

THE LEAST EXPENSIVE PROGRAMS YOU CAN BUY. Up to 77 high-quality programs for TRS-80, only $8! THE $15.50 COMPILER: TINY PASCAL FOR TRS-80 At last your TRS-80 can run Pascal too! The Chung/Yuen 'tiny' Pascal is fully implemented for Level II TRS-80, 16K and up. You no longer need be left out of the growing group of Pascal users, because People's Pascal gives you everything you need to write structured Pascal programs: . tiny Pascal compiler . complete text editor for writing your programs . complete tiny Pascal monitor . sample Pascal programs . user's manual (TRS-80 Computing issue 1:4) People's Pascal is both a powerful, structured language and 'CPU expeditor'. People's Pascal programs execute at least four times faster than Basic, and often eight-times faster! Special functions open up the complete graphic capability of TRS-80. You now have the means to write those dazzling, impressive, high-speed graphics programs that are great for games, plotting, statistics, etc. For the serious computerist, side two of People's Pascal II (tape 6) contains a larger compiler and complete source to the compiler, written in Pascal! This means you can re-compile the compiler, making changes, adding features, etc. (but this will take at least 36K RAM and a solid knowledge of programming). With the complete People's Pascal operating system, you can save and load both source (Pascal) programs, and compiled programs, to or from cassette tape. This means that once you have de-bugged a program, you can save the P-code (compiled program) and thereafter, to run the program, you need only load the super-fast P-code. Here is a partial list of People's Pascal features: recursive procedure/functions for (loop) case if/then/else one-dimensional arrays write read constant repeat/until (loop) 'peek & poke' plot (graphics for TRS-80) DEALER INQUERIES INVITED People's Pascal 1 (tape 3) is written in Basic, implemented for TRS-80 by John Alexander of Berwick Australia. It compiles P codes more slowly and is harder to use than Pascal 2, but its P codes can be translated into Z80 native code and saved as System tapes. Pascal 2 requires that Pascal be resident at run time-Pascal 1 does not. Other People's Software tapes $8. TAPE 1 LEVEL 2 Mortgage calculations, Dow Jones Industrial, cash flow, inventory-change, California income tax, journal ledger (8K), loan amortization, perpetual calendar, bio rhythm, payroll, diet planning, speed reading, touch typing, sales receipt tally, decision maker, mail addressing, straight depreciation, double-declining depreciation, and revolving charge account. Also, math problems, queen, Star Trek I, number guessing, wheel of fortune, World War II bomber, rock-scissors-paper, seek, Star Trek II, Red Baron, mini-Trek, strategy, pilot, battleship, 'On A Snowy Evening', mastermind, tic-tac-toe, grand prix auto race, capitals, etch sketch, hangman. Total programs: 34; Level 1 version available: 24 programs. $8. $8. TAPE 2 Some Common Basic Programs (lev. 2) Fully documented in Some Common Basic Programs by Lon Poole & Mary Borchers (Osborne & Associates, 630 Bancroft way, Berkeley CA 94710-or from CIE-$12.50 postpaid from CIE, via UPS, CA residents add tax (to $13.25): Investment, future value regular deposits; regular deposits; regular withdrawals, initial, minim (for withdrawals); nominal interest, effective & earned-interest; depreciation rate, amount depreciation; salvage value; discount com'l paper; loan principal, regular & last payment, remaining balance, term-loan; mortgage amortization; greatest common denom.: integer prime factors; polygon area; triangle parts; analysis, operations two vectors; radian-degree., degree-radian conversion; coordinate, polar equation, functions plot; linear, curvilinear interpolation; Simpson's & trapezoidal rules, Gaussian quadrature integration; derivative. Side 2-quadratic equation, polynomial (Newton) & half-interval-search roots; trig polynomial; simultaneous equations; linear programming; matrix addition, subtraction; scalar multiplication, inversion; permutations & combinations; Mann-Whitney U test; mean, variance, standard deviation; geometric mean & deviation; binomial, Poisson, normal, Chi-square distribution; Chi-sq., student's T-distribution test; F-distribution; linear correlation coefficient; linear, multiple-linear, Nth order, geometric, exponential regression; system reliability; future projections; Federal withholding taxes; tax depreciation schedule; check writer; recipe cost; map check; day of week; days between two dates; anglo to metric; alphebitize. $8 TAPE 3 People's Pascal Development System 1 Pascal 1 compiler-program development system. $15.50. TAPE 4 LEVEL 1 Election returns, business percentage, ups and downs of business, index, inventory control, sales receipt tally, gas mileage, driving distance, mixed monthly sales report, payroll, annual earnings, speech recording aid, and double-declining depreciation. Also, math problems, cash register, chase, snoopy, commander-in-chief, Christmas graphic, air raid, balance scale, stock market, tic-tac-toe and On A Snowy Evening. $8. TAPE 5 LEVEL 2 Memory test, mortgage payments, tension breaker, lineprinter-screen & vice-versa utilities, Federal income tax, election returns, business percentage, vacation planner, car pool (disk), diet planning 2, mailing list (disk) and first aid. Also spelling bee, Star Trek 3, mind bender, tachistoscope, chase, common factor, klingon capture, spelling practice, Hamurati, animals, Snoopy, cryptogram, starship, ants, Yesterday, and Pilot (disk). Pilot is the language of computer-aided instruction (CAI). TAPE 6 People's Pascal 2 Pascal 2 compiler-program development system. $23.50. TAPE 7 LEVEL 2 Disassembler, Pilot, roster, dropout, memory loader, memory sort, inventory control, graph, land surveying, mixed monthly sales report, shopping list, diet planning 3, loan progress chart, hex-declimal conversion. Also Star Trek 4, states and capitals, battleships 2, spelling practice 2, number guessing, hangman 2, snark, slot machine, cipher, target, surround, adder, termites, lunar lander, multiplication exercise, five-in-a-row, Bastem, and write. A number after a program indicates there are other similar People's Software programs. Pilot is the same as the disk pilot on tape 5, except runs on 16K tape systems. $8. -CA Residents Add 6 per cent TAX ($8.45, $16.40 & 24.88). Quoted Prices INCLUDE $.50 Shipping- COMPUTER INFORMATION EXCHANGE Box 159, San Luis Rey CA 92068 (714) 757-4849

THE LEAST EXPENSIVE PROGRAMS YOU CAN BUY. Up to 77 high-quality programs for TRS-80, only $8! THE $15.50 COMPILER: TINY PASCAL FOR TRS-80 At last your TRS-80 can run Pascal too! The Chung/Yuen 'tiny' Pascal is fully implemented for Level II TRS-80, 16K and up. You no longer need be left out of the growing group of Pascal users, because People's Pascal gives you everything you need to write structured Pascal programs: . tiny Pascal compiler . complete text editor for writing your programs . complete tiny Pascal monitor . sample Pascal programs . user's manual (TRS-80 Computing issue 1:4) People's Pascal is both a powerful, structured language and 'CPU expeditor'. People's Pascal programs execute at least four times faster than Basic, and often eight-times faster! Special functions open up the complete graphic capability of TRS-80. You now have the means to write those dazzling, impressive, high-speed graphics programs that are great for games, plotting, statistics, etc. For the serious computerist, side two of People's Pascal II (tape 6) contains a larger compiler and complete source to the compiler, written in Pascal! This means you can re-compile the compiler, making changes, adding features, etc. (but this will take at least 36K RAM and a solid knowledge of programming). With the complete People's Pascal operating system, you can save and load both source (Pascal) programs, and compiled programs, to or from cassette tape. This means that once you have de-bugged a program, you can save the P-code (compiled program) and thereafter, to run the program, you need only load the super-fast P-code. Here is a partial list of People's Pascal features: recursive procedure/functions for (loop) case if/then/else one-dimensional arrays write read constant repeat/until (loop) 'peek & poke' plot (graphics for TRS-80) DEALER INQUERIES INVITED People's Pascal 1 (tape 3) is written in Basic, implemented for TRS-80 by John Alexander of Berwick Australia. It compiles P codes more slowly and is harder to use than Pascal 2, but its P codes can be translated into Z80 native code and saved as System tapes. Pascal 2 requires that Pascal be resident at run time-Pascal 1 does not. Other People's Software tapes $8. TAPE 1 LEVEL 2 Mortgage calculations, Dow Jones Industrial, cash flow, inventory-change, California income tax, journal ledger (8K), loan amortization, perpetual calendar, bio rhythm, payroll, diet planning, speed reading, touch typing, sales receipt tally, decision maker, mail addressing, straight depreciation, double-declining depreciation, and revolving charge account. Also, math problems, queen, Star Trek I, number guessing, wheel of fortune, World War II bomber, rock-scissors-paper, seek, Star Trek II, Red Baron, mini-Trek, strategy, pilot, battleship, 'On A Snowy Evening', mastermind, tic-tac-toe, grand prix auto race, capitals, etch sketch, hangman. Total programs: 34; Level 1 version available: 24 programs. $8. $8. TAPE 2 Some Common Basic Programs (lev. 2) Fully documented in Some Common Basic Programs by Lon Poole & Mary Borchers (Osborne & Associates, 630 Bancroft way, Berkeley CA 94710-or from CIE-$12.50 postpaid from CIE, via UPS, CA residents add tax (to $13.25): Investment, future value regular deposits; regular deposits; regular withdrawals, initial, minim (for withdrawals); nominal interest, effective & earned-interest; depreciation rate, amount depreciation; salvage value; discount com'l paper; loan principal, regular & last payment, remaining balance, term-loan; mortgage amortization; greatest common denom.: integer prime factors; polygon area; triangle parts; analysis, operations two vectors; radian-degree., degree-radian conversion; coordinate, polar equation, functions plot; linear, curvilinear interpolation; Simpson's & trapezoidal rules, Gaussian quadrature integration; derivative. Side 2-quadratic equation, polynomial (Newton) & half-interval-search roots; trig polynomial; simultaneous equations; linear programming; matrix addition, subtraction; scalar multiplication, inversion; permutations & combinations; Mann-Whitney U test; mean, variance, standard deviation; geometric mean & deviation; binomial, Poisson, normal, Chi-square distribution; Chi-sq., student's T-distribution test; F-distribution; linear correlation coefficient; linear, multiple-linear, Nth order, geometric, exponential regression; system reliability; future projections; Federal withholding taxes; tax depreciation schedule; check writer; recipe cost; map check; day of week; days between two dates; anglo to metric; alphebitize. $8 TAPE 3 People's Pascal Development System 1 Pascal 1 compiler-program development system. $15.50. TAPE 4 LEVEL 1 Election returns, business percentage, ups and downs of business, index, inventory control, sales receipt tally, gas mileage, driving distance, mixed monthly sales report, payroll, annual earnings, speech recording aid, and double-declining depreciation. Also, math problems, cash register, chase, snoopy, commander-in-chief, Christmas graphic, air raid, balance scale, stock market, tic-tac-toe and On A Snowy Evening. $8. TAPE 5 LEVEL 2 Memory test, mortgage payments, tension breaker, lineprinter-screen & vice-versa utilities, Federal income tax, election returns, business percentage, vacation planner, car pool (disk), diet planning 2, mailing list (disk) and first aid. Also spelling bee, Star Trek 3, mind bender, tachistoscope, chase, common factor, klingon capture, spelling practice, Hamurati, animals, Snoopy, cryptogram, starship, ants, Yesterday, and Pilot (disk). Pilot is the language of computer-aided instruction (CAI). TAPE 6 People's Pascal 2 Pascal 2 compiler-program development system. $23.50. TAPE 7 LEVEL 2 Disassembler, Pilot, roster, dropout, memory loader, memory sort, inventory control, graph, land surveying, mixed monthly sales report, shopping list, diet planning 3, loan progress chart, hex-declimal conversion. Also Star Trek 4, states and capitals, battleships 2, spelling practice 2, number guessing, hangman 2, snark, slot machine, cipher, target, surround, adder, termites, lunar lander, multiplication exercise, five-in-a-row, Bastem, and write. A number after a program indicates there are other similar People's Software programs. Pilot is the same as the disk pilot on tape 5, except runs on 16K tape systems. $8. -CA Residents Add 6 per cent TAX ($8.45, $16.40 & 24.88). Quoted Prices INCLUDE $.50 Shipping- COMPUTER INFORMATION EXCHANGE Box 159, San Luis Rey CA 92068 (714) 757-4849

THE LEAST EXPENSIVE PROGRAMS YOU CAN BUY. Up to 77 high-quality programs for TRS-80, only $8! THE $15.50 COMPILER: TINY PASCAL FOR TRS-80 At last your TRS-80 can run Pascal too! The Chung/Yuen 'tiny' Pascal is fully implemented for Level II TRS-80, 16K and up. You no longer need be left out of the growing group of Pascal users, because People's Pascal gives you everything you need to write structured Pascal programs: . tiny Pascal compiler . complete text editor for writing your programs . complete tiny Pascal monitor . sample Pascal programs . user's manual (TRS-80 Computing issue 1:4) People's Pascal is both a powerful, structured language and 'CPU expeditor'. People's Pascal programs execute at least four times faster than Basic, and often eight-times faster! Special functions open up the complete graphic capability of TRS-80. You now have the means to write those dazzling, impressive, high-speed graphics programs that are great for games, plotting, statistics, etc. For the serious computerist, side two of People's Pascal II (tape 6) contains a larger compiler and complete source to the compiler, written in Pascal! This means you can re-compile the compiler, making changes, adding features, etc. (but this will take at least 36K RAM and a solid knowledge of programming). With the complete People's Pascal operating system, you can save and load both source (Pascal) programs, and compiled programs, to or from cassette tape. This means that once you have de-bugged a program, you can save the P-code (compiled program) and thereafter, to run the program, you need only load the super-fast P-code. Here is a partial list of People's Pascal features: recursive procedure/functions for (loop) case if/then/else one-dimensional arrays write read constant repeat/until (loop) 'peek & poke' plot (graphics for TRS-80) DEALER INQUERIES INVITED People's Pascal 1 (tape 3) is written in Basic, implemented for TRS-80 by John Alexander of Berwick Australia. It compiles P codes more slowly and is harder to use than Pascal 2, but its P codes can be translated into Z80 native code and saved as System tapes. Pascal 2 requires that Pascal be resident at run time-Pascal 1 does not. Other People's Software tapes $8. TAPE 1 LEVEL 2 Mortgage calculations, Dow Jones Industrial, cash flow, inventory-change, California income tax, journal ledger (8K), loan amortization, perpetual calendar, bio rhythm, payroll, diet planning, speed reading, touch typing, sales receipt tally, decision maker, mail addressing, straight depreciation, double-declining depreciation, and revolving charge account. Also, math problems, queen, Star Trek I, number guessing, wheel of fortune, World War II bomber, rock-scissors-paper, seek, Star Trek II, Red Baron, mini-Trek, strategy, pilot, battleship, 'On A Snowy Evening', mastermind, tic-tac-toe, grand prix auto race, capitals, etch sketch, hangman. Total programs: 34; Level 1 version available: 24 programs. $8. $8. TAPE 2 Some Common Basic Programs (lev. 2) Fully documented in Some Common Basic Programs by Lon Poole & Mary Borchers (Osborne & Associates, 630 Bancroft way, Berkeley CA 94710-or from CIE-$12.50 postpaid from CIE, via UPS, CA residents add tax (to $13.25): Investment, future value regular deposits; regular deposits; regular withdrawals, initial, minim (for withdrawals); nominal interest, effective & earned-interest; depreciation rate, amount depreciation; salvage value; discount com'l paper; loan principal, regular & last payment, remaining balance, term-loan; mortgage amortization; greatest common denom.: integer prime factors; polygon area; triangle parts; analysis, operations two vectors; radian-degree., degree-radian conversion; coordinate, polar equation, functions plot; linear, curvilinear interpolation; Simpson's & trapezoidal rules, Gaussian quadrature integration; derivative. Side 2-quadratic equation, polynomial (Newton) & half-interval-search roots; trig polynomial; simultaneous equations; linear programming; matrix addition, subtraction; scalar multiplication, inversion; permutations & combinations; Mann-Whitney U test; mean, variance, standard deviation; geometric mean & deviation; binomial, Poisson, normal, Chi-square distribution; Chi-sq., student's T-distribution test; F-distribution; linear correlation coefficient; linear, multiple-linear, Nth order, geometric, exponential regression; system reliability; future projections; Federal withholding taxes; tax depreciation schedule; check writer; recipe cost; map check; day of week; days between two dates; anglo to metric; alphebitize. $8 TAPE 3 People's Pascal Development System 1 Pascal 1 compiler-program development system. $15.50. TAPE 4 LEVEL 1 Election returns, business percentage, ups and downs of business, index, inventory control, sales receipt tally, gas mileage, driving distance, mixed monthly sales report, payroll, annual earnings, speech recording aid, and double-declining depreciation. Also, math problems, cash register, chase, snoopy, commander-in-chief, Christmas graphic, air raid, balance scale, stock market, tic-tac-toe and On A Snowy Evening. $8. TAPE 5 LEVEL 2 Memory test, mortgage payments, tension breaker, lineprinter-screen & vice-versa utilities, Federal income tax, election returns, business percentage, vacation planner, car pool (disk), diet planning 2, mailing list (disk) and first aid. Also spelling bee, Star Trek 3, mind bender, tachistoscope, chase, common factor, klingon capture, spelling practice, Hamurati, animals, Snoopy, cryptogram, starship, ants, Yesterday, and Pilot (disk). Pilot is the language of computer-aided instruction (CAI). TAPE 6 People's Pascal 2 Pascal 2 compiler-program development system. $23.50. TAPE 7 LEVEL 2 Disassembler, Pilot, roster, dropout, memory loader, memory sort, inventory control, graph, land surveying, mixed monthly sales report, shopping list, diet planning 3, loan progress chart, hex-declimal conversion. Also Star Trek 4, states and capitals, battleships 2, spelling practice 2, number guessing, hangman 2, snark, slot machine, cipher, target, surround, adder, termites, lunar lander, multiplication exercise, five-in-a-row, Bastem, and write. A number after a program indicates there are other similar People's Software programs. Pilot is the same as the disk pilot on tape 5, except runs on 16K tape systems. $8. -CA Residents Add 6 per cent TAX ($8.45, $16.40 & 24.88). Quoted Prices INCLUDE $.50 Shipping- COMPUTER INFORMATION EXCHANGE Box 159, San Luis Rey CA 92068 (714) 757-4849

THE LEAST EXPENSIVE PROGRAMS YOU CAN BUY. Up to 77 high-quality programs for TRS-80, only $8! THE $15.50 COMPILER: TINY PASCAL FOR TRS-80 At last your TRS-80 can run Pascal too! The Chung/Yuen 'tiny' Pascal is fully implemented for Level II TRS-80, 16K and up. You no longer need be left out of the growing group of Pascal users, because People's Pascal gives you everything you need to write structured Pascal programs: . tiny Pascal compiler . complete text editor for writing your programs . complete tiny Pascal monitor . sample Pascal programs . user's manual (TRS-80 Computing issue 1:4) People's Pascal is both a powerful, structured language and 'CPU expeditor'. People's Pascal programs execute at least four times faster than Basic, and often eight-times faster! Special functions open up the complete graphic capability of TRS-80. You now have the means to write those dazzling, impressive, high-speed graphics programs that are great for games, plotting, statistics, etc. For the serious computerist, side two of People's Pascal II (tape 6) contains a larger compiler and complete source to the compiler, written in Pascal! This means you can re-compile the compiler, making changes, adding features, etc. (but this will take at least 36K RAM and a solid knowledge of programming). With the complete People's Pascal operating system, you can save and load both source (Pascal) programs, and compiled programs, to or from cassette tape. This means that once you have de-bugged a program, you can save the P-code (compiled program) and thereafter, to run the program, you need only load the super-fast P-code. Here is a partial list of People's Pascal features: recursive procedure/functions for (loop) case if/then/else one-dimensional arrays write read constant repeat/until (loop) 'peek & poke' plot (graphics for TRS-80) DEALER INQUERIES INVITED People's Pascal 1 (tape 3) is written in Basic, implemented for TRS-80 by John Alexander of Berwick Australia. It compiles P codes more slowly and is harder to use than Pascal 2, but its P codes can be translated into Z80 native code and saved as System tapes. Pascal 2 requires that Pascal be resident at run time-Pascal 1 does not. Other People's Software tapes $8. TAPE 1 LEVEL 2 Mortgage calculations, Dow Jones Industrial, cash flow, inventory-change, California income tax, journal ledger (8K), loan amortization, perpetual calendar, bio rhythm, payroll, diet planning, speed reading, touch typing, sales receipt tally, decision maker, mail addressing, straight depreciation, double-declining depreciation, and revolving charge account. Also, math problems, queen, Star Trek I, number guessing, wheel of fortune, World War II bomber, rock-scissors-paper, seek, Star Trek II, Red Baron, mini-Trek, strategy, pilot, battleship, 'On A Snowy Evening', mastermind, tic-tac-toe, grand prix auto race, capitals, etch sketch, hangman. Total programs: 34; Level 1 version available: 24 programs. $8. $8. TAPE 2 Some Common Basic Programs (lev. 2) Fully documented in Some Common Basic Programs by Lon Poole & Mary Borchers (Osborne & Associates, 630 Bancroft way, Berkeley CA 94710-or from CIE-$12.50 postpaid from CIE, via UPS, CA residents add tax (to $13.25): Investment, future value regular deposits; regular deposits; regular withdrawals, initial, minim (for withdrawals); nominal interest, effective & earned-interest; depreciation rate, amount depreciation; salvage value; discount com'l paper; loan principal, regular & last payment, remaining balance, term-loan; mortgage amortization; greatest common denom.: integer prime factors; polygon area; triangle parts; analysis, operations two vectors; radian-degree., degree-radian conversion; coordinate, polar equation, functions plot; linear, curvilinear interpolation; Simpson's & trapezoidal rules, Gaussian quadrature integration; derivative. Side 2-quadratic equation, polynomial (Newton) & half-interval-search roots; trig polynomial; simultaneous equations; linear programming; matrix addition, subtraction; scalar multiplication, inversion; permutations & combinations; Mann-Whitney U test; mean, variance, standard deviation; geometric mean & deviation; binomial, Poisson, normal, Chi-square distribution; Chi-sq., student's T-distribution test; F-distribution; linear correlation coefficient; linear, multiple-linear, Nth order, geometric, exponential regression; system reliability; future projections; Federal withholding taxes; tax depreciation schedule; check writer; recipe cost; map check; day of week; days between two dates; anglo to metric; alphebitize. $8 TAPE 3 People's Pascal Development System 1 Pascal 1 compiler-program development system. $15.50. TAPE 4 LEVEL 1 Election returns, business percentage, ups and downs of business, index, inventory control, sales receipt tally, gas mileage, driving distance, mixed monthly sales report, payroll, annual earnings, speech recording aid, and double-declining depreciation. Also, math problems, cash register, chase, snoopy, commander-in-chief, Christmas graphic, air raid, balance scale, stock market, tic-tac-toe and On A Snowy Evening. $8. TAPE 5 LEVEL 2 Memory test, mortgage payments, tension breaker, lineprinter-screen & vice-versa utilities, Federal income tax, election returns, business percentage, vacation planner, car pool (disk), diet planning 2, mailing list (disk) and first aid. Also spelling bee, Star Trek 3, mind bender, tachistoscope, chase, common factor, klingon capture, spelling practice, Hamurati, animals, Snoopy, cryptogram, starship, ants, Yesterday, and Pilot (disk). Pilot is the language of computer-aided instruction (CAI). TAPE 6 People's Pascal 2 Pascal 2 compiler-program development system. $23.50. TAPE 7 LEVEL 2 Disassembler, Pilot, roster, dropout, memory loader, memory sort, inventory control, graph, land surveying, mixed monthly sales report, shopping list, diet planning 3, loan progress chart, hex-declimal conversion. Also Star Trek 4, states and capitals, battleships 2, spelling practice 2, number guessing, hangman 2, snark, slot machine, cipher, target, surround, adder, termites, lunar lander, multiplication exercise, five-in-a-row, Bastem, and write. A number after a program indicates there are other similar People's Software programs. Pilot is the same as the disk pilot on tape 5, except runs on 16K tape systems. $8. -CA Residents Add 6 per cent TAX ($8.45, $16.40 & 24.88). Quoted Prices INCLUDE $.50 Shipping- COMPUTER INFORMATION EXCHANGE Box 159, San Luis Rey CA 92068 (714) 757-4849

THE LEAST EXPENSIVE PROGRAMS YOU CAN BUY. Up to 77 high-quality programs for TRS-80, only $8! THE $15.50 COMPILER: TINY PASCAL FOR TRS-80 At last your TRS-80 can run Pascal too! The Chung/Yuen 'tiny' Pascal is fully implemented for Level II TRS-80, 16K and up. You no longer need be left out of the growing group of Pascal users, because People's Pascal gives you everything you need to write structured Pascal programs: . tiny Pascal compiler . complete text editor for writing your programs . complete tiny Pascal monitor . sample Pascal programs . user's manual (TRS-80 Computing issue 1:4) People's Pascal is both a powerful, structured language and 'CPU expeditor'. People's Pascal programs execute at least four times faster than Basic, and often eight-times faster! Special functions open up the complete graphic capability of TRS-80. You now have the means to write those dazzling, impressive, high-speed graphics programs that are great for games, plotting, statistics, etc. For the serious computerist, side two of People's Pascal II (tape 6) contains a larger compiler and complete source to the compiler, written in Pascal! This means you can re-compile the compiler, making changes, adding features, etc. (but this will take at least 36K RAM and a solid knowledge of programming). With the complete People's Pascal operating system, you can save and load both source (Pascal) programs, and compiled programs, to or from cassette tape. This means that once you have de-bugged a program, you can save the P-code (compiled program) and thereafter, to run the program, you need only load the super-fast P-code. Here is a partial list of People's Pascal features: recursive procedure/functions for (loop) case if/then/else one-dimensional arrays write read constant repeat/until (loop) 'peek & poke' plot (graphics for TRS-80) DEALER INQUERIES INVITED People's Pascal 1 (tape 3) is written in Basic, implemented for TRS-80 by John Alexander of Berwick Australia. It compiles P codes more slowly and is harder to use than Pascal 2, but its P codes can be translated into Z80 native code and saved as System tapes. Pascal 2 requires that Pascal be resident at run time-Pascal 1 does not. Other People's Software tapes $8. TAPE 1 LEVEL 2 Mortgage calculations, Dow Jones Industrial, cash flow, inventory-change, California income tax, journal ledger (8K), loan amortization, perpetual calendar, bio rhythm, payroll, diet planning, speed reading, touch typing, sales receipt tally, decision maker, mail addressing, straight depreciation, double-declining depreciation, and revolving charge account. Also, math problems, queen, Star Trek I, number guessing, wheel of fortune, World War II bomber, rock-scissors-paper, seek, Star Trek II, Red Baron, mini-Trek, strategy, pilot, battleship, 'On A Snowy Evening', mastermind, tic-tac-toe, grand prix auto race, capitals, etch sketch, hangman. Total programs: 34; Level 1 version available: 24 programs. $8. $8. TAPE 2 Some Common Basic Programs (lev. 2) Fully documented in Some Common Basic Programs by Lon Poole & Mary Borchers (Osborne & Associates, 630 Bancroft way, Berkeley CA 94710-or from CIE-$12.50 postpaid from CIE, via UPS, CA residents add tax (to $13.25): Investment, future value regular deposits; regular deposits; regular withdrawals, initial, minim (for withdrawals); nominal interest, effective & earned-interest; depreciation rate, amount depreciation; salvage value; discount com'l paper; loan principal, regular & last payment, remaining balance, term-loan; mortgage amortization; greatest common denom.: integer prime factors; polygon area; triangle parts; analysis, operations two vectors; radian-degree., degree-radian conversion; coordinate, polar equation, functions plot; linear, curvilinear interpolation; Simpson's & trapezoidal rules, Gaussian quadrature integration; derivative. Side 2-quadratic equation, polynomial (Newton) & half-interval-search roots; trig polynomial; simultaneous equations; linear programming; matrix addition, subtraction; scalar multiplication, inversion; permutations & combinations; Mann-Whitney U test; mean, variance, standard deviation; geometric mean & deviation; binomial, Poisson, normal, Chi-square distribution; Chi-sq., student's T-distribution test; F-distribution; linear correlation coefficient; linear, multiple-linear, Nth order, geometric, exponential regression; system reliability; future projections; Federal withholding taxes; tax depreciation schedule; check writer; recipe cost; map check; day of week; days between two dates; anglo to metric; alphebitize. $8 TAPE 3 People's Pascal Development System 1 Pascal 1 compiler-program development system. $15.50. TAPE 4 LEVEL 1 Election returns, business percentage, ups and downs of business, index, inventory control, sales receipt tally, gas mileage, driving distance, mixed monthly sales report, payroll, annual earnings, speech recording aid, and double-declining depreciation. Also, math problems, cash register, chase, snoopy, commander-in-chief, Christmas graphic, air raid, balance scale, stock market, tic-tac-toe and On A Snowy Evening. $8. TAPE 5 LEVEL 2 Memory test, mortgage payments, tension breaker, lineprinter-screen & vice-versa utilities, Federal income tax, election returns, business percentage, vacation planner, car pool (disk), diet planning 2, mailing list (disk) and first aid. Also spelling bee, Star Trek 3, mind bender, tachistoscope, chase, common factor, klingon capture, spelling practice, Hamurati, animals, Snoopy, cryptogram, starship, ants, Yesterday, and Pilot (disk). Pilot is the language of computer-aided instruction (CAI). TAPE 6 People's Pascal 2 Pascal 2 compiler-program development system. $23.50. TAPE 7 LEVEL 2 Disassembler, Pilot, roster, dropout, memory loader, memory sort, inventory control, graph, land surveying, mixed monthly sales report, shopping list, diet planning 3, loan progress chart, hex-declimal conversion. Also Star Trek 4, states and capitals, battleships 2, spelling practice 2, number guessing, hangman 2, snark, slot machine, cipher, target, surround, adder, termites, lunar lander, multiplication exercise, five-in-a-row, Bastem, and write. A number after a program indicates there are other similar People's Software programs. Pilot is the same as the disk pilot on tape 5, except runs on 16K tape systems. $8. -CA Residents Add 6 per cent TAX ($8.45, $16.40 & 24.88). Quoted Prices INCLUDE $.50 Shipping- COMPUTER INFORMATION EXCHANGE Box 159, San Luis Rey CA 92068 (714) 757-4849

THE LEAST EXPENSIVE PROGRAMS YOU CAN BUY. Up to 77 high-quality programs for TRS-80, only $8! THE $15.50 COMPILER: TINY PASCAL FOR TRS-80 At last your TRS-80 can run Pascal too! The Chung/Yuen 'tiny' Pascal is fully implemented for Level II TRS-80, 16K and up. You no longer need be left out of the growing group of Pascal users, because People's Pascal gives you everything you need to write structured Pascal programs: . tiny Pascal compiler . complete text editor for writing your programs . complete tiny Pascal monitor . sample Pascal programs . user's manual (TRS-80 Computing issue 1:4) People's Pascal is both a powerful, structured language and 'CPU expeditor'. People's Pascal programs execute at least four times faster than Basic, and often eight-times faster! Special functions open up the complete graphic capability of TRS-80. You now have the means to write those dazzling, impressive, high-speed graphics programs that are great for games, plotting, statistics, etc. For the serious computerist, side two of People's Pascal II (tape 6) contains a larger compiler and complete source to the compiler, written in Pascal! This means you can re-compile the compiler, making changes, adding features, etc. (but this will take at least 36K RAM and a solid knowledge of programming). With the complete People's Pascal operating system, you can save and load both source (Pascal) programs, and compiled programs, to or from cassette tape. This means that once you have de-bugged a program, you can save the P-code (compiled program) and thereafter, to run the program, you need only load the super-fast P-code. Here is a partial list of People's Pascal features: recursive procedure/functions for (loop) case if/then/else one-dimensional arrays write read constant repeat/until (loop) 'peek & poke' plot (graphics for TRS-80) DEALER INQUERIES INVITED People's Pascal 1 (tape 3) is written in Basic, implemented for TRS-80 by John Alexander of Berwick Australia. It compiles P codes more slowly and is harder to use than Pascal 2, but its P codes can be translated into Z80 native code and saved as System tapes. Pascal 2 requires that Pascal be resident at run time-Pascal 1 does not. Other People's Software tapes $8. TAPE 1 LEVEL 2 Mortgage calculations, Dow Jones Industrial, cash flow, inventory-change, California income tax, journal ledger (8K), loan amortization, perpetual calendar, bio rhythm, payroll, diet planning, speed reading, touch typing, sales receipt tally, decision maker, mail addressing, straight depreciation, double-declining depreciation, and revolving charge account. Also, math problems, queen, Star Trek I, number guessing, wheel of fortune, World War II bomber, rock-scissors-paper, seek, Star Trek II, Red Baron, mini-Trek, strategy, pilot, battleship, 'On A Snowy Evening', mastermind, tic-tac-toe, grand prix auto race, capitals, etch sketch, hangman. Total programs: 34; Level 1 version available: 24 programs. $8. $8. TAPE 2 Some Common Basic Programs (lev. 2) Fully documented in Some Common Basic Programs by Lon Poole & Mary Borchers (Osborne & Associates, 630 Bancroft way, Berkeley CA 94710-or from CIE-$12.50 postpaid from CIE, via UPS, CA residents add tax (to $13.25): Investment, future value regular deposits; regular deposits; regular withdrawals, initial, minim (for withdrawals); nominal interest, effective & earned-interest; depreciation rate, amount depreciation; salvage value; discount com'l paper; loan principal, regular & last payment, remaining balance, term-loan; mortgage amortization; greatest common denom.: integer prime factors; polygon area; triangle parts; analysis, operations two vectors; radian-degree., degree-radian conversion; coordinate, polar equation, functions plot; linear, curvilinear interpolation; Simpson's & trapezoidal rules, Gaussian quadrature integration; derivative. Side 2-quadratic equation, polynomial (Newton) & half-interval-search roots; trig polynomial; simultaneous equations; linear programming; matrix addition, subtraction; scalar multiplication, inversion; permutations & combinations; Mann-Whitney U test; mean, variance, standard deviation; geometric mean & deviation; binomial, Poisson, normal, Chi-square distribution; Chi-sq., student's T-distribution test; F-distribution; linear correlation coefficient; linear, multiple-linear, Nth order, geometric, exponential regression; system reliability; future projections; Federal withholding taxes; tax depreciation schedule; check writer; recipe cost; map check; day of week; days between two dates; anglo to metric; alphebitize. $8 TAPE 3 People's Pascal Development System 1 Pascal 1 compiler-program development system. $15.50. TAPE 4 LEVEL 1 Election returns, business percentage, ups and downs of business, index, inventory control, sales receipt tally, gas mileage, driving distance, mixed monthly sales report, payroll, annual earnings, speech recording aid, and double-declining depreciation. Also, math problems, cash register, chase, snoopy, commander-in-chief, Christmas graphic, air raid, balance scale, stock market, tic-tac-toe and On A Snowy Evening. $8. TAPE 5 LEVEL 2 Memory test, mortgage payments, tension breaker, lineprinter-screen & vice-versa utilities, Federal income tax, election returns, business percentage, vacation planner, car pool (disk), diet planning 2, mailing list (disk) and first aid. Also spelling bee, Star Trek 3, mind bender, tachistoscope, chase, common factor, klingon capture, spelling practice, Hamurati, animals, Snoopy, cryptogram, starship, ants, Yesterday, and Pilot (disk). Pilot is the language of computer-aided instruction (CAI). TAPE 6 People's Pascal 2 Pascal 2 compiler-program development system. $23.50. TAPE 7 LEVEL 2 Disassembler, Pilot, roster, dropout, memory loader, memory sort, inventory control, graph, land surveying, mixed monthly sales report, shopping list, diet planning 3, loan progress chart, hex-declimal conversion. Also Star Trek 4, states and capitals, battleships 2, spelling practice 2, number guessing, hangman 2, snark, slot machine, cipher, target, surround, adder, termites, lunar lander, multiplication exercise, five-in-a-row, Bastem, and write. A number after a program indicates there are other similar People's Software programs. Pilot is the same as the disk pilot on tape 5, except runs on 16K tape systems. $8. -CA Residents Add 6 per cent TAX ($8.45, $16.40 & 24.88). Quoted Prices INCLUDE $.50 Shipping- COMPUTER INFORMATION EXCHANGE Box 159, San Luis Rey CA 92068 (714) 757-4849

THE LEAST EXPENSIVE PROGRAMS YOU CAN BUY. Up to 77 high-quality programs for TRS-80, only $8! THE $15.50 COMPILER: TINY PASCAL FOR TRS-80 At last your TRS-80 can run Pascal too! The Chung/Yuen 'tiny' Pascal is fully implemented for Level II TRS-80, 16K and up. You no longer need be left out of the growing group of Pascal users, because People's Pascal gives you everything you need to write structured Pascal programs: . tiny Pascal compiler . complete text editor for writing your programs . complete tiny Pascal monitor . sample Pascal programs . user's manual (TRS-80 Computing issue 1:4) People's Pascal is both a powerful, structured language and 'CPU expeditor'. People's Pascal programs execute at least four times faster than Basic, and often eight-times faster! Special functions open up the complete graphic capability of TRS-80. You now have the means to write those dazzling, impressive, high-speed graphics programs that are great for games, plotting, statistics, etc. For the serious computerist, side two of People's Pascal II (tape 6) contains a larger compiler and complete source to the compiler, written in Pascal! This means you can re-compile the compiler, making changes, adding features, etc. (but this will take at least 36K RAM and a solid knowledge of programming). With the complete People's Pascal operating system, you can save and load both source (Pascal) programs, and compiled programs, to or from cassette tape. This means that once you have de-bugged a program, you can save the P-code (compiled program) and thereafter, to run the program, you need only load the super-fast P-code. Here is a partial list of People's Pascal features: recursive procedure/functions for (loop) case if/then/else one-dimensional arrays write read constant repeat/until (loop) 'peek & poke' plot (graphics for TRS-80) DEALER INQUERIES INVITED People's Pascal 1 (tape 3) is written in Basic, implemented for TRS-80 by John Alexander of Berwick Australia. It compiles P codes more slowly and is harder to use than Pascal 2, but its P codes can be translated into Z80 native code and saved as System tapes. Pascal 2 requires that Pascal be resident at run time-Pascal 1 does not. Other People's Software tapes $8. TAPE 1 LEVEL 2 Mortgage calculations, Dow Jones Industrial, cash flow, inventory-change, California income tax, journal ledger (8K), loan amortization, perpetual calendar, bio rhythm, payroll, diet planning, speed reading, touch typing, sales receipt tally, decision maker, mail addressing, straight depreciation, double-declining depreciation, and revolving charge account. Also, math problems, queen, Star Trek I, number guessing, wheel of fortune, World War II bomber, rock-scissors-paper, seek, Star Trek II, Red Baron, mini-Trek, strategy, pilot, battleship, 'On A Snowy Evening', mastermind, tic-tac-toe, grand prix auto race, capitals, etch sketch, hangman. Total programs: 34; Level 1 version available: 24 programs. $8. $8. TAPE 2 Some Common Basic Programs (lev. 2) Fully documented in Some Common Basic Programs by Lon Poole & Mary Borchers (Osborne & Associates, 630 Bancroft way, Berkeley CA 94710-or from CIE-$12.50 postpaid from CIE, via UPS, CA residents add tax (to $13.25): Investment, future value regular deposits; regular deposits; regular withdrawals, initial, minim (for withdrawals); nominal interest, effective & earned-interest; depreciation rate, amount depreciation; salvage value; discount com'l paper; loan principal, regular & last payment, remaining balance, term-loan; mortgage amortization; greatest common denom.: integer prime factors; polygon area; triangle parts; analysis, operations two vectors; radian-degree., degree-radian conversion; coordinate, polar equation, functions plot; linear, curvilinear interpolation; Simpson's & trapezoidal rules, Gaussian quadrature integration; derivative. Side 2-quadratic equation, polynomial (Newton) & half-interval-search roots; trig polynomial; simultaneous equations; linear programming; matrix addition, subtraction; scalar multiplication, inversion; permutations & combinations; Mann-Whitney U test; mean, variance, standard deviation; geometric mean & deviation; binomial, Poisson, normal, Chi-square distribution; Chi-sq., student's T-distribution test; F-distribution; linear correlation coefficient; linear, multiple-linear, Nth order, geometric, exponential regression; system reliability; future projections; Federal withholding taxes; tax depreciation schedule; check writer; recipe cost; map check; day of week; days between two dates; anglo to metric; alphebitize. $8 TAPE 3 People's Pascal Development System 1 Pascal 1 compiler-program development system. $15.50. TAPE 4 LEVEL 1 Election returns, business percentage, ups and downs of business, index, inventory control, sales receipt tally, gas mileage, driving distance, mixed monthly sales report, payroll, annual earnings, speech recording aid, and double-declining depreciation. Also, math problems, cash register, chase, snoopy, commander-in-chief, Christmas graphic, air raid, balance scale, stock market, tic-tac-toe and On A Snowy Evening. $8. TAPE 5 LEVEL 2 Memory test, mortgage payments, tension breaker, lineprinter-screen & vice-versa utilities, Federal income tax, election returns, business percentage, vacation planner, car pool (disk), diet planning 2, mailing list (disk) and first aid. Also spelling bee, Star Trek 3, mind bender, tachistoscope, chase, common factor, klingon capture, spelling practice, Hamurati, animals, Snoopy, cryptogram, starship, ants, Yesterday, and Pilot (disk). Pilot is the language of computer-aided instruction (CAI). TAPE 6 People's Pascal 2 Pascal 2 compiler-program development system. $23.50. TAPE 7 LEVEL 2 Disassembler, Pilot, roster, dropout, memory loader, memory sort, inventory control, graph, land surveying, mixed monthly sales report, shopping list, diet planning 3, loan progress chart, hex-declimal conversion. Also Star Trek 4, states and capitals, battleships 2, spelling practice 2, number guessing, hangman 2, snark, slot machine, cipher, target, surround, adder, termites, lunar lander, multiplication exercise, five-in-a-row, Bastem, and write. A number after a program indicates there are other similar People's Software programs. Pilot is the same as the disk pilot on tape 5, except runs on 16K tape systems. $8. -CA Residents Add 6 per cent TAX ($8.45, $16.40 & 24.88). Quoted Prices INCLUDE $.50 Shipping- COMPUTER INFORMATION EXCHANGE Box 159, San Luis Rey CA 92068 (714) 757-4849

TAPE 9: 25 programs! People's Software Tape 9, just out, contains 25 programs, including: Convert, by SuperPIMx author Chuck House. It changes number bases from hexadecimal, decimal, octal, binary-from any one to any other! House also contributed his disassembler, which is winner of the Richcraft Engineering (Disassembled Handbook for TRS-80) Fastest Footrace contest. Disassembled Handbook author Robert M. Richardson contributed three Basic programs which allow transmitting and receiving Morse code at speeds to 40 words-per-minute, without clock speedup. Morse appeared in Disassembled vo. II and III. Basic Page Lister was adapted by House, and prints beautifully-formatted program listings. Allen R. Greenburg contributed a professional-quality amortization-schedule preparation program, and a Multiplication-Tables Tutor. Also on Tape 9: Loan Payback by Dan Connors, Resonant Frequency by Steve Simcic, and Feedback System Stability Analysis by Phil Dunn. Gary Petersen contributed Distance Formula for X-Y axis, and Bruno M. Larsen submitted a mailing list and sales-record-keeping program. Carey Tyler Schug contributed a parser routine. Games include Solitaire, Boggle, an extremely fine Hangman, and a four-part quiz on American History, inventions, American wars and U.S. territories. The quiz is by Ronald N. Goulden, and is followed by one on presidents and states, which is so difficult the challenge is to answer at least half the questions correctly. Piet & Jon Spiessens (Spiesoft) of Aartselaar, Belgium submitted Sherlock detective game and Word Search (guess opponent's word). Also on Tape 9 is Motorcycle Jump by Russell Starkey and Robot by Wm. J. Schuler (original by W. Lappen), who also submitted Sea Search. $10.95

UTILITY DISK Disk #5 Includes: PREFORM/CMD - Disk Re-Formatter Utility. Fixes CRC errors and 'strengthens' the format on older disks. A FORMAT without ERASE utility(5 inch floppy only) PVU/CMD - a Disk Verification Utility. Detects bad sectors. Fix them with PREFORM/CMD. PERASE/CMD - Disk Bulk Eraser (5 inch floppy only)

Percom Mini-Disk Drive Systems for TRS-80 Computers Now! Add-On and Add-In Mini-Disk Storage for your Model III. The industry leader in microcomputer peripherals, Percom not only gives you better design, better quality and first-rate service, but you pay less to boot. New for the TRS-80 Model III Patterned after our fast-selling TFD Model I drives. And subjected to the same reliability controls. These new TFD mini-disk systems for the Model III provide more features than Tandy drives, yet cost far less. Flippy Capability: Both internal (add-in) and external (add-on) drives permit recording on either side of a diskette. Greater Storage Capacity: Available with either 40- or 80-track drive mechanisms, Percom TFD mini-disk systems store more. A 40-track drive stores up to 180 Kbytes - formatted - on one side of a 5-inch diskette. An 80-track drive stores a whopping 364 Kbytes. 1.5 Mbyte On-line: The Percom drive controller (included with the initial drive) handles up to four drives. With four 80-track mini-disk drives you can access over 1.5 million bytes of on-line file data. Moreover, the initial drive may be either an internal add-in drive or an external add-on drive. And whichever configuration you get, the initial drive kit comes complete with our advanced 4-drive controller, interconnecting cables, power supplies, installation hardware, a DOS and of course the drive mechanism itself. First Drive Includes DOS: OS-80, Percom's fast extendable BASIC-language disk operating system, is included on diskette when you purchase an initial drive kit. Originally called MicroDOS, OS-80 was favorably reviewed in the June 1980 issue of Creative Computing magazine. Works with Model III TRSDOS: Besides being fully hardware compatible, Percom's Model III 40-track drive systems may be operated with Tandy's Model III TRSDOS - without any modifications whatsoever. And, TRSDOS may be easily upgraded with simple software patches for operating 80-track drives. Percom TFD add-on drives start at only $399. Model III Drive kits start at only $749.95. Quality Percom products are available at authorized dealers. Call toll free 1-800-527-1592 for the address of your nearest dealer or to order direct from Percom. Still #1 for Model I As if greater storage capacities, exceptional quality control measures and lower prices aren't reasons enough to make Percom your first choice for Model I add-on drives, all Percom Model I drives are also rated for double-density operation. Add our innovative DOUBLER adapter to your Model I Expansion Interface, and with Percom drive systems you can enjoy the same double-density storage capability as Model III owners. The DOUBLER includes a TRSDOS-like double-density disk operating system called DBLDOS We also offer a double-density Model I version of OS-80 as well as DOUBLEZAP programs for modifying NEWDOS/80 and VTOS 4.0 for DOUBLER compatibility. Of course you don't have to upgrade your computer for double-density operation to use Percom mini-disk drive systems. In single-density operation, our TRS-80 Model I compatible 40-track drives store 102 Kbytes of formatted data on one side of a diskette, and our 80-track drives store 205 Kbytes. By comparison, Tandy's standard drive for the Model I stores just 86 Kbytes. And like our Model III drives, Model I add-on drives are optionally available with 'flippy' storage capability. System Requirements: Model III: 16-Kbyte system (min) and Model III BASIC. The second internal drive may be installed after the first internal drive kit is installed, and external drives #2, #3 and #4 may be added if either an internal or external first-drive kit has been installed. External drives #3 and #4 require an optional interconnecting cable. Model I: 16-Kbyte system (min), Level II BASIC, Expansion Interface, disk operating system and an interconnecting cable. For double-density storage, a Percom DOUBLER must be installed in the Expansion Interface and DBLDOS (comes with the DOUBLER) or other double-density DOS must be used. For single-density operation, a Percom SEPARATOR adapter, installed in the Expansion Interface, will virtually eliminate 'CRC ERROR - TRACK LOCKED OUT' read errors. Prices and specifications subject to change without notice. PERCOM DATA COMPANY, INC. 211 N. KIRBY GARLAND, TEXAS 75042 (214) 272-3421 Trademark of Tandy Radio Shack Corporation which has no relationship to Percom Data Company. DOUBLER, DBLDOS, OS-80 and SEPARATOR are trademarks of Percom Data Company, Inc. Trademark of Virtual Technology Corporation.

Percom Mini-Disk Drive Systems for TRS-80 Computers Now! Add-On and Add-In Mini-Disk Storage for your Model III. The industry leader in microcomputer peripherals, Percom not only gives you better design, better quality and first-rate service, but you pay less to boot. New for the TRS-80 Model III Patterned after our fast-selling TFD Model I drives. And subjected to the same reliability controls. These new TFD mini-disk systems for the Model III provide more features than Tandy drives, yet cost far less. Flippy Capability: Both internal (add-in) and external (add-on) drives permit recording on either side of a diskette. Greater Storage Capacity: Available with either 40- or 80-track drive mechanisms, Percom TFD mini-disk systems store more. A 40-track drive stores up to 180 Kbytes - formatted - on one side of a 5-inch diskette. An 80-track drive stores a whopping 364 Kbytes. 1.5 Mbyte On-line: The Percom drive controller (included with the initial drive) handles up to four drives. With four 80-track mini-disk drives you can access over 1.5 million bytes of on-line file data. Moreover, the initial drive may be either an internal add-in drive or an external add-on drive. And whichever configuration you get, the initial drive kit comes complete with our advanced 4-drive controller, interconnecting cables, power supplies, installation hardware, a DOS and of course the drive mechanism itself. First Drive Includes DOS: OS-80, Percom's fast extendable BASIC-language disk operating system, is included on diskette when you purchase an initial drive kit. Originally called MicroDOS, OS-80 was favorably reviewed in the June 1980 issue of Creative Computing magazine. Works with Model III TRSDOS: Besides being fully hardware compatible, Percom's Model III 40-track drive systems may be operated with Tandy's Model III TRSDOS - without any modifications whatsoever. And, TRSDOS may be easily upgraded with simple software patches for operating 80-track drives. Percom TFD add-on drives start at only $399. Model III Drive kits start at only $749.95. Quality Percom products are available at authorized dealers. Call toll free 1-800-527-1592 for the address of your nearest dealer or to order direct from Percom. Still #1 for Model I As if greater storage capacities, exceptional quality control measures and lower prices aren't reasons enough to make Percom your first choice for Model I add-on drives, all Percom Model I drives are also rated for double-density operation. Add our innovative DOUBLER adapter to your Model I Expansion Interface, and with Percom drive systems you can enjoy the same double-density storage capability as Model III owners. The DOUBLER includes a TRSDOS-like double-density disk operating system called DBLDOS We also offer a double-density Model I version of OS-80 as well as DOUBLEZAP programs for modifying NEWDOS/80 and VTOS 4.0 for DOUBLER compatibility. Of course you don't have to upgrade your computer for double-density operation to use Percom mini-disk drive systems. In single-density operation, our TRS-80 Model I compatible 40-track drives store 102 Kbytes of formatted data on one side of a diskette, and our 80-track drives store 205 Kbytes. By comparison, Tandy's standard drive for the Model I stores just 86 Kbytes. And like our Model III drives, Model I add-on drives are optionally available with 'flippy' storage capability. System Requirements: Model III: 16-Kbyte system (min) and Model III BASIC. The second internal drive may be installed after the first internal drive kit is installed, and external drives #2, #3 and #4 may be added if either an internal or external first-drive kit has been installed. External drives #3 and #4 require an optional interconnecting cable. Model I: 16-Kbyte system (min), Level II BASIC, Expansion Interface, disk operating system and an interconnecting cable. For double-density storage, a Percom DOUBLER must be installed in the Expansion Interface and DBLDOS (comes with the DOUBLER) or other double-density DOS must be used. For single-density operation, a Percom SEPARATOR adapter, installed in the Expansion Interface, will virtually eliminate 'CRC ERROR - TRACK LOCKED OUT' read errors. Prices and specifications subject to change without notice. PERCOM DATA COMPANY, INC. 211 N. KIRBY GARLAND, TEXAS 75042 (214) 272-3421 Trademark of Tandy Radio Shack Corporation which has no relationship to Percom Data Company. DOUBLER, DBLDOS, OS-80 and SEPARATOR are trademarks of Percom Data Company, Inc. Trademark of Virtual Technology Corporation.

Percom Mini-Disk Drive Systems for TRS-80 Computers Now! Add-On and Add-In Mini-Disk Storage for your Model III. The industry leader in microcomputer peripherals, Percom not only gives you better design, better quality and first-rate service, but you pay less to boot. New for the TRS-80 Model III Patterned after our fast-selling TFD Model I drives. And subjected to the same reliability controls. These new TFD mini-disk systems for the Model III provide more features than Tandy drives, yet cost far less. Flippy Capability: Both internal (add-in) and external (add-on) drives permit recording on either side of a diskette. Greater Storage Capacity: Available with either 40- or 80-track drive mechanisms, Percom TFD mini-disk systems store more. A 40-track drive stores up to 180 Kbytes - formatted - on one side of a 5-inch diskette. An 80-track drive stores a whopping 364 Kbytes. 1.5 Mbyte On-line: The Percom drive controller (included with the initial drive) handles up to four drives. With four 80-track mini-disk drives you can access over 1.5 million bytes of on-line file data. Moreover, the initial drive may be either an internal add-in drive or an external add-on drive. And whichever configuration you get, the initial drive kit comes complete with our advanced 4-drive controller, interconnecting cables, power supplies, installation hardware, a DOS and of course the drive mechanism itself. First Drive Includes DOS: OS-80, Percom's fast extendable BASIC-language disk operating system, is included on diskette when you purchase an initial drive kit. Originally called MicroDOS, OS-80 was favorably reviewed in the June 1980 issue of Creative Computing magazine. Works with Model III TRSDOS: Besides being fully hardware compatible, Percom's Model III 40-track drive systems may be operated with Tandy's Model III TRSDOS - without any modifications whatsoever. And, TRSDOS may be easily upgraded with simple software patches for operating 80-track drives. Percom TFD add-on drives start at only $399. Model III Drive kits start at only $749.95. Quality Percom products are available at authorized dealers. Call toll free 1-800-527-1592 for the address of your nearest dealer or to order direct from Percom. Still #1 for Model I As if greater storage capacities, exceptional quality control measures and lower prices aren't reasons enough to make Percom your first choice for Model I add-on drives, all Percom Model I drives are also rated for double-density operation. Add our innovative DOUBLER adapter to your Model I Expansion Interface, and with Percom drive systems you can enjoy the same double-density storage capability as Model III owners. The DOUBLER includes a TRSDOS-like double-density disk operating system called DBLDOS We also offer a double-density Model I version of OS-80 as well as DOUBLEZAP programs for modifying NEWDOS/80 and VTOS 4.0 for DOUBLER compatibility. Of course you don't have to upgrade your computer for double-density operation to use Percom mini-disk drive systems. In single-density operation, our TRS-80 Model I compatible 40-track drives store 102 Kbytes of formatted data on one side of a diskette, and our 80-track drives store 205 Kbytes. By comparison, Tandy's standard drive for the Model I stores just 86 Kbytes. And like our Model III drives, Model I add-on drives are optionally available with 'flippy' storage capability. System Requirements: Model III: 16-Kbyte system (min) and Model III BASIC. The second internal drive may be installed after the first internal drive kit is installed, and external drives #2, #3 and #4 may be added if either an internal or external first-drive kit has been installed. External drives #3 and #4 require an optional interconnecting cable. Model I: 16-Kbyte system (min), Level II BASIC, Expansion Interface, disk operating system and an interconnecting cable. For double-density storage, a Percom DOUBLER must be installed in the Expansion Interface and DBLDOS (comes with the DOUBLER) or other double-density DOS must be used. For single-density operation, a Percom SEPARATOR adapter, installed in the Expansion Interface, will virtually eliminate 'CRC ERROR - TRACK LOCKED OUT' read errors. Prices and specifications subject to change without notice. PERCOM DATA COMPANY, INC. 211 N. KIRBY GARLAND, TEXAS 75042 (214) 272-3421 Trademark of Tandy Radio Shack Corporation which has no relationship to Percom Data Company. DOUBLER, DBLDOS, OS-80 and SEPARATOR are trademarks of Percom Data Company, Inc. Trademark of Virtual Technology Corporation.

Percom Mini-Disk Drive Systems for TRS-80 Computers Now! Add-On and Add-In Mini-Disk Storage for your Model III. The industry leader in microcomputer peripherals, Percom not only gives you better design, better quality and first-rate service, but you pay less to boot. New for the TRS-80 Model III Patterned after our fast-selling TFD Model I drives. And subjected to the same reliability controls. These new TFD mini-disk systems for the Model III provide more features than Tandy drives, yet cost far less. Flippy Capability: Both internal (add-in) and external (add-on) drives permit recording on either side of a diskette. Greater Storage Capacity: Available with either 40- or 80-track drive mechanisms, Percom TFD mini-disk systems store more. A 40-track drive stores up to 180 Kbytes - formatted - on one side of a 5-inch diskette. An 80-track drive stores a whopping 364 Kbytes. 1.5 Mbyte On-line: The Percom drive controller (included with the initial drive) handles up to four drives. With four 80-track mini-disk drives you can access over 1.5 million bytes of on-line file data. Moreover, the initial drive may be either an internal add-in drive or an external add-on drive. And whichever configuration you get, the initial drive kit comes complete with our advanced 4-drive controller, interconnecting cables, power supplies, installation hardware, a DOS and of course the drive mechanism itself. First Drive Includes DOS: OS-80, Percom's fast extendable BASIC-language disk operating system, is included on diskette when you purchase an initial drive kit. Originally called MicroDOS, OS-80 was favorably reviewed in the June 1980 issue of Creative Computing magazine. Works with Model III TRSDOS: Besides being fully hardware compatible, Percom's Model III 40-track drive systems may be operated with Tandy's Model III TRSDOS - without any modifications whatsoever. And, TRSDOS may be easily upgraded with simple software patches for operating 80-track drives. Percom TFD add-on drives start at only $399. Model III Drive kits start at only $749.95. Quality Percom products are available at authorized dealers. Call toll free 1-800-527-1592 for the address of your nearest dealer or to order direct from Percom. Still #1 for Model I As if greater storage capacities, exceptional quality control measures and lower prices aren't reasons enough to make Percom your first choice for Model I add-on drives, all Percom Model I drives are also rated for double-density operation. Add our innovative DOUBLER adapter to your Model I Expansion Interface, and with Percom drive systems you can enjoy the same double-density storage capability as Model III owners. The DOUBLER includes a TRSDOS-like double-density disk operating system called DBLDOS We also offer a double-density Model I version of OS-80 as well as DOUBLEZAP programs for modifying NEWDOS/80 and VTOS 4.0 for DOUBLER compatibility. Of course you don't have to upgrade your computer for double-density operation to use Percom mini-disk drive systems. In single-density operation, our TRS-80 Model I compatible 40-track drives store 102 Kbytes of formatted data on one side of a diskette, and our 80-track drives store 205 Kbytes. By comparison, Tandy's standard drive for the Model I stores just 86 Kbytes. And like our Model III drives, Model I add-on drives are optionally available with 'flippy' storage capability. System Requirements: Model III: 16-Kbyte system (min) and Model III BASIC. The second internal drive may be installed after the first internal drive kit is installed, and external drives #2, #3 and #4 may be added if either an internal or external first-drive kit has been installed. External drives #3 and #4 require an optional interconnecting cable. Model I: 16-Kbyte system (min), Level II BASIC, Expansion Interface, disk operating system and an interconnecting cable. For double-density storage, a Percom DOUBLER must be installed in the Expansion Interface and DBLDOS (comes with the DOUBLER) or other double-density DOS must be used. For single-density operation, a Percom SEPARATOR adapter, installed in the Expansion Interface, will virtually eliminate 'CRC ERROR - TRACK LOCKED OUT' read errors. Prices and specifications subject to change without notice. PERCOM DATA COMPANY, INC. 211 N. KIRBY GARLAND, TEXAS 75042 (214) 272-3421 Trademark of Tandy Radio Shack Corporation which has no relationship to Percom Data Company. DOUBLER, DBLDOS, OS-80 and SEPARATOR are trademarks of Percom Data Company, Inc. Trademark of Virtual Technology Corporation.

Percom Mini-Disk Drive Systems for TRS-80 Computers Now! Add-On and Add-In Mini-Disk Storage for your Model III. The industry leader in microcomputer peripherals, Percom not only gives you better design, better quality and first-rate service, but you pay less to boot. New for the TRS-80 Model III Patterned after our fast-selling TFD Model I drives. And subjected to the same reliability controls. These new TFD mini-disk systems for the Model III provide more features than Tandy drives, yet cost far less. Flippy Capability: Both internal (add-in) and external (add-on) drives permit recording on either side of a diskette. Greater Storage Capacity: Available with either 40- or 80-track drive mechanisms, Percom TFD mini-disk systems store more. A 40-track drive stores up to 180 Kbytes - formatted - on one side of a 5-inch diskette. An 80-track drive stores a whopping 364 Kbytes. 1.5 Mbyte On-line: The Percom drive controller (included with the initial drive) handles up to four drives. With four 80-track mini-disk drives you can access over 1.5 million bytes of on-line file data. Moreover, the initial drive may be either an internal add-in drive or an external add-on drive. And whichever configuration you get, the initial drive kit comes complete with our advanced 4-drive controller, interconnecting cables, power supplies, installation hardware, a DOS and of course the drive mechanism itself. First Drive Includes DOS: OS-80, Percom's fast extendable BASIC-language disk operating system, is included on diskette when you purchase an initial drive kit. Originally called MicroDOS, OS-80 was favorably reviewed in the June 1980 issue of Creative Computing magazine. Works with Model III TRSDOS: Besides being fully hardware compatible, Percom's Model III 40-track drive systems may be operated with Tandy's Model III TRSDOS - without any modifications whatsoever. And, TRSDOS may be easily upgraded with simple software patches for operating 80-track drives. Percom TFD add-on drives start at only $399. Model III Drive kits start at only $749.95. Quality Percom products are available at authorized dealers. Call toll free 1-800-527-1592 for the address of your nearest dealer or to order direct from Percom. Still #1 for Model I As if greater storage capacities, exceptional quality control measures and lower prices aren't reasons enough to make Percom your first choice for Model I add-on drives, all Percom Model I drives are also rated for double-density operation. Add our innovative DOUBLER adapter to your Model I Expansion Interface, and with Percom drive systems you can enjoy the same double-density storage capability as Model III owners. The DOUBLER includes a TRSDOS-like double-density disk operating system called DBLDOS We also offer a double-density Model I version of OS-80 as well as DOUBLEZAP programs for modifying NEWDOS/80 and VTOS 4.0 for DOUBLER compatibility. Of course you don't have to upgrade your computer for double-density operation to use Percom mini-disk drive systems. In single-density operation, our TRS-80 Model I compatible 40-track drives store 102 Kbytes of formatted data on one side of a diskette, and our 80-track drives store 205 Kbytes. By comparison, Tandy's standard drive for the Model I stores just 86 Kbytes. And like our Model III drives, Model I add-on drives are optionally available with 'flippy' storage capability. System Requirements: Model III: 16-Kbyte system (min) and Model III BASIC. The second internal drive may be installed after the first internal drive kit is installed, and external drives #2, #3 and #4 may be added if either an internal or external first-drive kit has been installed. External drives #3 and #4 require an optional interconnecting cable. Model I: 16-Kbyte system (min), Level II BASIC, Expansion Interface, disk operating system and an interconnecting cable. For double-density storage, a Percom DOUBLER must be installed in the Expansion Interface and DBLDOS (comes with the DOUBLER) or other double-density DOS must be used. For single-density operation, a Percom SEPARATOR adapter, installed in the Expansion Interface, will virtually eliminate 'CRC ERROR - TRACK LOCKED OUT' read errors. Prices and specifications subject to change without notice. PERCOM DATA COMPANY, INC. 211 N. KIRBY GARLAND, TEXAS 75042 (214) 272-3421 Trademark of Tandy Radio Shack Corporation which has no relationship to Percom Data Company. DOUBLER, DBLDOS, OS-80 and SEPARATOR are trademarks of Percom Data Company, Inc. Trademark of Virtual Technology Corporation.

Percom Mini-Disk Drive Systems for TRS-80 Computers Now! Add-On and Add-In Mini-Disk Storage for your Model III. The industry leader in microcomputer peripherals, Percom not only gives you better design, better quality and first-rate service, but you pay less to boot. New for the TRS-80 Model III Patterned after our fast-selling TFD Model I drives. And subjected to the same reliability controls. These new TFD mini-disk systems for the Model III provide more features than Tandy drives, yet cost far less. Flippy Capability: Both internal (add-in) and external (add-on) drives permit recording on either side of a diskette. Greater Storage Capacity: Available with either 40- or 80-track drive mechanisms, Percom TFD mini-disk systems store more. A 40-track drive stores up to 180 Kbytes - formatted - on one side of a 5-inch diskette. An 80-track drive stores a whopping 364 Kbytes. 1.5 Mbyte On-line: The Percom drive controller (included with the initial drive) handles up to four drives. With four 80-track mini-disk drives you can access over 1.5 million bytes of on-line file data. Moreover, the initial drive may be either an internal add-in drive or an external add-on drive. And whichever configuration you get, the initial drive kit comes complete with our advanced 4-drive controller, interconnecting cables, power supplies, installation hardware, a DOS and of course the drive mechanism itself. First Drive Includes DOS: OS-80, Percom's fast extendable BASIC-language disk operating system, is included on diskette when you purchase an initial drive kit. Originally called MicroDOS, OS-80 was favorably reviewed in the June 1980 issue of Creative Computing magazine. Works with Model III TRSDOS: Besides being fully hardware compatible, Percom's Model III 40-track drive systems may be operated with Tandy's Model III TRSDOS - without any modifications whatsoever. And, TRSDOS may be easily upgraded with simple software patches for operating 80-track drives. Percom TFD add-on drives start at only $399. Model III Drive kits start at only $749.95. Quality Percom products are available at authorized dealers. Call toll free 1-800-527-1592 for the address of your nearest dealer or to order direct from Percom. Still #1 for Model I As if greater storage capacities, exceptional quality control measures and lower prices aren't reasons enough to make Percom your first choice for Model I add-on drives, all Percom Model I drives are also rated for double-density operation. Add our innovative DOUBLER adapter to your Model I Expansion Interface, and with Percom drive systems you can enjoy the same double-density storage capability as Model III owners. The DOUBLER includes a TRSDOS-like double-density disk operating system called DBLDOS We also offer a double-density Model I version of OS-80 as well as DOUBLEZAP programs for modifying NEWDOS/80 and VTOS 4.0 for DOUBLER compatibility. Of course you don't have to upgrade your computer for double-density operation to use Percom mini-disk drive systems. In single-density operation, our TRS-80 Model I compatible 40-track drives store 102 Kbytes of formatted data on one side of a diskette, and our 80-track drives store 205 Kbytes. By comparison, Tandy's standard drive for the Model I stores just 86 Kbytes. And like our Model III drives, Model I add-on drives are optionally available with 'flippy' storage capability. System Requirements: Model III: 16-Kbyte system (min) and Model III BASIC. The second internal drive may be installed after the first internal drive kit is installed, and external drives #2, #3 and #4 may be added if either an internal or external first-drive kit has been installed. External drives #3 and #4 require an optional interconnecting cable. Model I: 16-Kbyte system (min), Level II BASIC, Expansion Interface, disk operating system and an interconnecting cable. For double-density storage, a Percom DOUBLER must be installed in the Expansion Interface and DBLDOS (comes with the DOUBLER) or other double-density DOS must be used. For single-density operation, a Percom SEPARATOR adapter, installed in the Expansion Interface, will virtually eliminate 'CRC ERROR - TRACK LOCKED OUT' read errors. Prices and specifications subject to change without notice. PERCOM DATA COMPANY, INC. 211 N. KIRBY GARLAND, TEXAS 75042 (214) 272-3421 Trademark of Tandy Radio Shack Corporation which has no relationship to Percom Data Company. DOUBLER, DBLDOS, OS-80 and SEPARATOR are trademarks of Percom Data Company, Inc. Trademark of Virtual Technology Corporation.

Percom Mini-Disk Drive Systems for TRS-80 Computers Now! Add-On and Add-In Mini-Disk Storage for your Model III. The industry leader in microcomputer peripherals, Percom not only gives you better design, better quality and first-rate service, but you pay less to boot. New for the TRS-80 Model III Patterned after our fast-selling TFD Model I drives. And subjected to the same reliability controls. These new TFD mini-disk systems for the Model III provide more features than Tandy drives, yet cost far less. Flippy Capability: Both internal (add-in) and external (add-on) drives permit recording on either side of a diskette. Greater Storage Capacity: Available with either 40- or 80-track drive mechanisms, Percom TFD mini-disk systems store more. A 40-track drive stores up to 180 Kbytes - formatted - on one side of a 5-inch diskette. An 80-track drive stores a whopping 364 Kbytes. 1.5 Mbyte On-line: The Percom drive controller (included with the initial drive) handles up to four drives. With four 80-track mini-disk drives you can access over 1.5 million bytes of on-line file data. Moreover, the initial drive may be either an internal add-in drive or an external add-on drive. And whichever configuration you get, the initial drive kit comes complete with our advanced 4-drive controller, interconnecting cables, power supplies, installation hardware, a DOS and of course the drive mechanism itself. First Drive Includes DOS: OS-80, Percom's fast extendable BASIC-language disk operating system, is included on diskette when you purchase an initial drive kit. Originally called MicroDOS, OS-80 was favorably reviewed in the June 1980 issue of Creative Computing magazine. Works with Model III TRSDOS: Besides being fully hardware compatible, Percom's Model III 40-track drive systems may be operated with Tandy's Model III TRSDOS - without any modifications whatsoever. And, TRSDOS may be easily upgraded with simple software patches for operating 80-track drives. Percom TFD add-on drives start at only $399. Model III Drive kits start at only $749.95. Quality Percom products are available at authorized dealers. Call toll free 1-800-527-1592 for the address of your nearest dealer or to order direct from Percom. Still #1 for Model I As if greater storage capacities, exceptional quality control measures and lower prices aren't reasons enough to make Percom your first choice for Model I add-on drives, all Percom Model I drives are also rated for double-density operation. Add our innovative DOUBLER adapter to your Model I Expansion Interface, and with Percom drive systems you can enjoy the same double-density storage capability as Model III owners. The DOUBLER includes a TRSDOS-like double-density disk operating system called DBLDOS We also offer a double-density Model I version of OS-80 as well as DOUBLEZAP programs for modifying NEWDOS/80 and VTOS 4.0 for DOUBLER compatibility. Of course you don't have to upgrade your computer for double-density operation to use Percom mini-disk drive systems. In single-density operation, our TRS-80 Model I compatible 40-track drives store 102 Kbytes of formatted data on one side of a diskette, and our 80-track drives store 205 Kbytes. By comparison, Tandy's standard drive for the Model I stores just 86 Kbytes. And like our Model III drives, Model I add-on drives are optionally available with 'flippy' storage capability. System Requirements: Model III: 16-Kbyte system (min) and Model III BASIC. The second internal drive may be installed after the first internal drive kit is installed, and external drives #2, #3 and #4 may be added if either an internal or external first-drive kit has been installed. External drives #3 and #4 require an optional interconnecting cable. Model I: 16-Kbyte system (min), Level II BASIC, Expansion Interface, disk operating system and an interconnecting cable. For double-density storage, a Percom DOUBLER must be installed in the Expansion Interface and DBLDOS (comes with the DOUBLER) or other double-density DOS must be used. For single-density operation, a Percom SEPARATOR adapter, installed in the Expansion Interface, will virtually eliminate 'CRC ERROR - TRACK LOCKED OUT' read errors. Prices and specifications subject to change without notice. PERCOM DATA COMPANY, INC. 211 N. KIRBY GARLAND, TEXAS 75042 (214) 272-3421 Trademark of Tandy Radio Shack Corporation which has no relationship to Percom Data Company. DOUBLER, DBLDOS, OS-80 and SEPARATOR are trademarks of Percom Data Company, Inc. Trademark of Virtual Technology Corporation.

Percom Mini-Disk Drive Systems for TRS-80 Computers Now! Add-On and Add-In Mini-Disk Storage for your Model III. The industry leader in microcomputer peripherals, Percom not only gives you better design, better quality and first-rate service, but you pay less to boot. New for the TRS-80 Model III Patterned after our fast-selling TFD Model I drives. And subjected to the same reliability controls. These new TFD mini-disk systems for the Model III provide more features than Tandy drives, yet cost far less. Flippy Capability: Both internal (add-in) and external (add-on) drives permit recording on either side of a diskette. Greater Storage Capacity: Available with either 40- or 80-track drive mechanisms, Percom TFD mini-disk systems store more. A 40-track drive stores up to 180 Kbytes - formatted - on one side of a 5-inch diskette. An 80-track drive stores a whopping 364 Kbytes. 1.5 Mbyte On-line: The Percom drive controller (included with the initial drive) handles up to four drives. With four 80-track mini-disk drives you can access over 1.5 million bytes of on-line file data. Moreover, the initial drive may be either an internal add-in drive or an external add-on drive. And whichever configuration you get, the initial drive kit comes complete with our advanced 4-drive controller, interconnecting cables, power supplies, installation hardware, a DOS and of course the drive mechanism itself. First Drive Includes DOS: OS-80, Percom's fast extendable BASIC-language disk operating system, is included on diskette when you purchase an initial drive kit. Originally called MicroDOS, OS-80 was favorably reviewed in the June 1980 issue of Creative Computing magazine. Works with Model III TRSDOS: Besides being fully hardware compatible, Percom's Model III 40-track drive systems may be operated with Tandy's Model III TRSDOS - without any modifications whatsoever. And, TRSDOS may be easily upgraded with simple software patches for operating 80-track drives. Percom TFD add-on drives start at only $399. Model III Drive kits start at only $749.95. Quality Percom products are available at authorized dealers. Call toll free 1-800-527-1592 for the address of your nearest dealer or to order direct from Percom. Still #1 for Model I As if greater storage capacities, exceptional quality control measures and lower prices aren't reasons enough to make Percom your first choice for Model I add-on drives, all Percom Model I drives are also rated for double-density operation. Add our innovative DOUBLER adapter to your Model I Expansion Interface, and with Percom drive systems you can enjoy the same double-density storage capability as Model III owners. The DOUBLER includes a TRSDOS-like double-density disk operating system called DBLDOS We also offer a double-density Model I version of OS-80 as well as DOUBLEZAP programs for modifying NEWDOS/80 and VTOS 4.0 for DOUBLER compatibility. Of course you don't have to upgrade your computer for double-density operation to use Percom mini-disk drive systems. In single-density operation, our TRS-80 Model I compatible 40-track drives store 102 Kbytes of formatted data on one side of a diskette, and our 80-track drives store 205 Kbytes. By comparison, Tandy's standard drive for the Model I stores just 86 Kbytes. And like our Model III drives, Model I add-on drives are optionally available with 'flippy' storage capability. System Requirements: Model III: 16-Kbyte system (min) and Model III BASIC. The second internal drive may be installed after the first internal drive kit is installed, and external drives #2, #3 and #4 may be added if either an internal or external first-drive kit has been installed. External drives #3 and #4 require an optional interconnecting cable. Model I: 16-Kbyte system (min), Level II BASIC, Expansion Interface, disk operating system and an interconnecting cable. For double-density storage, a Percom DOUBLER must be installed in the Expansion Interface and DBLDOS (comes with the DOUBLER) or other double-density DOS must be used. For single-density operation, a Percom SEPARATOR adapter, installed in the Expansion Interface, will virtually eliminate 'CRC ERROR - TRACK LOCKED OUT' read errors. Prices and specifications subject to change without notice. PERCOM DATA COMPANY, INC. 211 N. KIRBY GARLAND, TEXAS 75042 (214) 272-3421 Trademark of Tandy Radio Shack Corporation which has no relationship to Percom Data Company. DOUBLER, DBLDOS, OS-80 and SEPARATOR are trademarks of Percom Data Company, Inc. Trademark of Virtual Technology Corporation.

Percom Mini-Disk Drive Systems for TRS-80 Computers Now! Add-On and Add-In Mini-Disk Storage for your Model III. The industry leader in microcomputer peripherals, Percom not only gives you better design, better quality and first-rate service, but you pay less to boot. New for the TRS-80 Model III Patterned after our fast-selling TFD Model I drives. And subjected to the same reliability controls. These new TFD mini-disk systems for the Model III provide more features than Tandy drives, yet cost far less. Flippy Capability: Both internal (add-in) and external (add-on) drives permit recording on either side of a diskette. Greater Storage Capacity: Available with either 40- or 80-track drive mechanisms, Percom TFD mini-disk systems store more. A 40-track drive stores up to 180 Kbytes - formatted - on one side of a 5-inch diskette. An 80-track drive stores a whopping 364 Kbytes. 1.5 Mbyte On-line: The Percom drive controller (included with the initial drive) handles up to four drives. With four 80-track mini-disk drives you can access over 1.5 million bytes of on-line file data. Moreover, the initial drive may be either an internal add-in drive or an external add-on drive. And whichever configuration you get, the initial drive kit comes complete with our advanced 4-drive controller, interconnecting cables, power supplies, installation hardware, a DOS and of course the drive mechanism itself. First Drive Includes DOS: OS-80, Percom's fast extendable BASIC-language disk operating system, is included on diskette when you purchase an initial drive kit. Originally called MicroDOS, OS-80 was favorably reviewed in the June 1980 issue of Creative Computing magazine. Works with Model III TRSDOS: Besides being fully hardware compatible, Percom's Model III 40-track drive systems may be operated with Tandy's Model III TRSDOS - without any modifications whatsoever. And, TRSDOS may be easily upgraded with simple software patches for operating 80-track drives. Percom TFD add-on drives start at only $399. Model III Drive kits start at only $749.95. Quality Percom products are available at authorized dealers. Call toll free 1-800-527-1592 for the address of your nearest dealer or to order direct from Percom. Still #1 for Model I As if greater storage capacities, exceptional quality control measures and lower prices aren't reasons enough to make Percom your first choice for Model I add-on drives, all Percom Model I drives are also rated for double-density operation. Add our innovative DOUBLER adapter to your Model I Expansion Interface, and with Percom drive systems you can enjoy the same double-density storage capability as Model III owners. The DOUBLER includes a TRSDOS-like double-density disk operating system called DBLDOS We also offer a double-density Model I version of OS-80 as well as DOUBLEZAP programs for modifying NEWDOS/80 and VTOS 4.0 for DOUBLER compatibility. Of course you don't have to upgrade your computer for double-density operation to use Percom mini-disk drive systems. In single-density operation, our TRS-80 Model I compatible 40-track drives store 102 Kbytes of formatted data on one side of a diskette, and our 80-track drives store 205 Kbytes. By comparison, Tandy's standard drive for the Model I stores just 86 Kbytes. And like our Model III drives, Model I add-on drives are optionally available with 'flippy' storage capability. System Requirements: Model III: 16-Kbyte system (min) and Model III BASIC. The second internal drive may be installed after the first internal drive kit is installed, and external drives #2, #3 and #4 may be added if either an internal or external first-drive kit has been installed. External drives #3 and #4 require an optional interconnecting cable. Model I: 16-Kbyte system (min), Level II BASIC, Expansion Interface, disk operating system and an interconnecting cable. For double-density storage, a Percom DOUBLER must be installed in the Expansion Interface and DBLDOS (comes with the DOUBLER) or other double-density DOS must be used. For single-density operation, a Percom SEPARATOR adapter, installed in the Expansion Interface, will virtually eliminate 'CRC ERROR - TRACK LOCKED OUT' read errors. Prices and specifications subject to change without notice. PERCOM DATA COMPANY, INC. 211 N. KIRBY GARLAND, TEXAS 75042 (214) 272-3421 Trademark of Tandy Radio Shack Corporation which has no relationship to Percom Data Company. DOUBLER, DBLDOS, OS-80 and SEPARATOR are trademarks of Percom Data Company, Inc. Trademark of Virtual Technology Corporation.

Percom Mini-Disk Drive Systems for TRS-80 Computers Now! Add-On and Add-In Mini-Disk Storage for your Model III. The industry leader in microcomputer peripherals, Percom not only gives you better design, better quality and first-rate service, but you pay less to boot. New for the TRS-80 Model III Patterned after our fast-selling TFD Model I drives. And subjected to the same reliability controls. These new TFD mini-disk systems for the Model III provide more features than Tandy drives, yet cost far less. Flippy Capability: Both internal (add-in) and external (add-on) drives permit recording on either side of a diskette. Greater Storage Capacity: Available with either 40- or 80-track drive mechanisms, Percom TFD mini-disk systems store more. A 40-track drive stores up to 180 Kbytes - formatted - on one side of a 5-inch diskette. An 80-track drive stores a whopping 364 Kbytes. 1.5 Mbyte On-line: The Percom drive controller (included with the initial drive) handles up to four drives. With four 80-track mini-disk drives you can access over 1.5 million bytes of on-line file data. Moreover, the initial drive may be either an internal add-in drive or an external add-on drive. And whichever configuration you get, the initial drive kit comes complete with our advanced 4-drive controller, interconnecting cables, power supplies, installation hardware, a DOS and of course the drive mechanism itself. First Drive Includes DOS: OS-80, Percom's fast extendable BASIC-language disk operating system, is included on diskette when you purchase an initial drive kit. Originally called MicroDOS, OS-80 was favorably reviewed in the June 1980 issue of Creative Computing magazine. Works with Model III TRSDOS: Besides being fully hardware compatible, Percom's Model III 40-track drive systems may be operated with Tandy's Model III TRSDOS - without any modifications whatsoever. And, TRSDOS may be easily upgraded with simple software patches for operating 80-track drives. Percom TFD add-on drives start at only $399. Model III Drive kits start at only $749.95. Quality Percom products are available at authorized dealers. Call toll free 1-800-527-1592 for the address of your nearest dealer or to order direct from Percom. Still #1 for Model I As if greater storage capacities, exceptional quality control measures and lower prices aren't reasons enough to make Percom your first choice for Model I add-on drives, all Percom Model I drives are also rated for double-density operation. Add our innovative DOUBLER adapter to your Model I Expansion Interface, and with Percom drive systems you can enjoy the same double-density storage capability as Model III owners. The DOUBLER includes a TRSDOS-like double-density disk operating system called DBLDOS We also offer a double-density Model I version of OS-80 as well as DOUBLEZAP programs for modifying NEWDOS/80 and VTOS 4.0 for DOUBLER compatibility. Of course you don't have to upgrade your computer for double-density operation to use Percom mini-disk drive systems. In single-density operation, our TRS-80 Model I compatible 40-track drives store 102 Kbytes of formatted data on one side of a diskette, and our 80-track drives store 205 Kbytes. By comparison, Tandy's standard drive for the Model I stores just 86 Kbytes. And like our Model III drives, Model I add-on drives are optionally available with 'flippy' storage capability. System Requirements: Model III: 16-Kbyte system (min) and Model III BASIC. The second internal drive may be installed after the first internal drive kit is installed, and external drives #2, #3 and #4 may be added if either an internal or external first-drive kit has been installed. External drives #3 and #4 require an optional interconnecting cable. Model I: 16-Kbyte system (min), Level II BASIC, Expansion Interface, disk operating system and an interconnecting cable. For double-density storage, a Percom DOUBLER must be installed in the Expansion Interface and DBLDOS (comes with the DOUBLER) or other double-density DOS must be used. For single-density operation, a Percom SEPARATOR adapter, installed in the Expansion Interface, will virtually eliminate 'CRC ERROR - TRACK LOCKED OUT' read errors. Prices and specifications subject to change without notice. PERCOM DATA COMPANY, INC. 211 N. KIRBY GARLAND, TEXAS 75042 (214) 272-3421 Trademark of Tandy Radio Shack Corporation which has no relationship to Percom Data Company. DOUBLER, DBLDOS, OS-80 and SEPARATOR are trademarks of Percom Data Company, Inc. Trademark of Virtual Technology Corporation.

PATCH PAK #1 PATCH PAK 1, which is supplied free (on disk) with the purchase of a drive, both extends TRSDOS - to accommodate 40- and 77-track drives - and improves it. With the patch applied, the problem of interference with disk operations caused by the TRS-80 'Heartbeat' pulse is eliminated. And with PATCH PAK 1, most of the so-called 'silent deaths' - premature stopping of the drive motor during operation - are also eliminated. If silent death failures do occur, you can recover without hitting Reset, and therefore without destroying programs and data in memory. PATCH PAK 1 is applied to your system disk (containing TRSDOS version 2.1) 'on the fly' using two drives, one containing your system disk and the other containing the PATCH PAK 1 disk. Application instructions are included.

DISK OPERATING SYSTEMS PATCHPAK #4 by Percom Data $8.95

DISK OPERATING SYSTEMS PATCHPAK #4 by Percom Data $8.95