Ira Goldklang's TRS-80 Revived Site

TRS-80 Revived Site is an archive of everything related to the Tandy Radio Shack TRS-80 microcomputer lines. Site contains emulators, programs, manuals, books, patches, games, hints, discussions, questions, forums, and tons more.

TRS-80 Computers: TRS-80 Model 4

by @ 9:15 pm on March 4, 2009.
TRS-80 Model 4


General
TRS-80 Model IV
  • Model 4: Non-Gate Array
  • Catalog: 26-1069
  • Picture Tube: Early version Black and White, later version Green
  • RS-232 Port Direction: Faces the bottom of the unit (i.e., down)
  • Arrow Keys: Early version, not clustered (up/down and left/right were on 2 different sides of the motherboard), later version, clustered arrow keys
  • Implementation of I/O: Disk Drive Controller, Sound Card (for beeping), and RS-232 were implemented via daughterboard
  • Socketed? Processor was socketed (so that it could be replaced with a Z800 when/if it came out, which it never did) and Z800 support chips were present.
  • Memory Manager: Programmable Logic Array (PAL)

  • TRS-80 Model IV
  • Model 4: Gate Array
  • Catalog: 26-1069A
  • Picture Tube: Green
  • RS-232 Port Direction: The RS-232 port faces the back of the unit (i.e., out)
  • Arrow Keys: Mostly Clustered, some versions may have non clustered arrow keys. Why clustered? Lore has it that Tandy was trying to copy Apple’s keyboard layout. Difficulty in playing games with clustered arrows, however, resulted in later models being changed back to non-clustered.
  • Implementation of I/O: Disk Drive Controller, Sound Card (for beeping), and RS-232 were on the motherboard
  • Socketed? Processor was socketed, but Z800 support was dropped
  • Memory Manager: Gate Array

  • TRS-80 Model 4D
  • Model 4: “D”
  • Catalog: 26-1070
  • Picture Tube: Green
  • Is the “D” for Double Sided Drives? NO! It’s for DeskMate.
  • RS-232 was moved to face out rather than down.

  • TRS-80 Model 4P
  • Model 4: “P”
  • Catalog: 26-1080
  • P=’Portable’ (luggable). It has no Model III ROMS. You would know one if you saw one.


  • TRS-80 Model 4 [RSC-12]
    TRS-80 Model 4. Compare the features of the Model 4 personal desktop computer to any other computer in its class. For power, versatility and convenience, you’ll find Model 4 is a true price breakthrough!

    Software Flexibility. Model 4 can run all Model III TRSDOS and LDOS programs (in Model III mode). That means a large software library is already available, and Model III owners can upgrade to a Model 4 without making their present software obsolete. In addition, Model 4 is compatible with the CP/M Plus operating system giving you literally thousands of application programs from which to coohse.

    Easy to Use. Simply add ready-to-run programs for word processing, spreadsheet analysis, data base management and much more and Model 4 is ready to go to work. The 2-disk model provides 368K of disk storage (184K each) and has a built-in RS-232C Serial Interface to access information networks by phone (requires modem and cable). Three programmable function keys let you take advantage of program-designated operations.

    Advanced Features. The TRSDOS 6 operating system allows you to turn extra memory into a superfast disk drive. This “MemDisk” feature allows for keystroke-quick responses instead of time-consuming disk access. A swoftware print spooler lets you print one job while working on another. You can custom-tailor print-outs with the forms command. A Job Control Language makes it possible to set up a while series of operations that Model 4 can perform unattended. A host/terminal package makes computer communications easy. There are more features for serious programmers, too, such as routing, linking and filtering.

    Complete Documentation. Model 4 comes with Microsoft Disk BASIC that includes 40-character variable names, CHAIN, COMMAND and much more. Also comes with TRSDOS 6 operating system, an owner’s manual, reference card, programming maual, and an introduction to start you computing immediately. U.L. listed.

    Who is the Model 4 for? The Model 4 is the perfect computer for busy managers, professionals, educators, and home computer users. Because of a huge ready-to-run software library is currently available, Model 4 can be used for forecasting, word processing, data base management, computer assisted instruction, program development and for thousands of other applications. The TRS-80 Model 4 expands easily to meet your growing computing needs, too.

    Specifications

    Microprocessor. 4MHz Z-80A (2 MHz in Model III mode)
    Memory: 14K ROM, 64K RAM expandable to 128K (provides for disk drive emulation in RAM).
    Keyboard: 70-key typewriter-style with datapad, plus control, caps and 3 programmable function keys (F1, F2, F3).
    Video Display: 80 x 24 (Model 4 mode), 64 x 16 (Model III mode) or double-width 40 or 32 characters per line. Upper and lower case and reverse video (Model 4 mode). 96 text. 64 graphics and 96 “special” characters.
    Language: Microsoft 5.0 BASIC
    Sound: Obtainable from BASIC. Roggled “keyclick”
    Disk Drives: One or two built-in double-density 184K 5-1/4″ drives.
    External Connections: Cassette operation at 500/1500 baud. Parallel print port. RS-232C serial port (2-Disk version only). Buffered input/output bus.
    Dimensions 12-1/2 x 18-7/8 x 21-1/2″
    Power: 120VAC, 60Hz.



    Radio Shack’s Description of the Model 4-D
    Model 4D with DeskMate. The perfect desktop computer for busy managers, professionals, educators and home users. The Model 4D even comes with valuable DeskMate software on diskette, featuring the applications today’s computer user wants most. Plus. because a huge software library is already available, the Model 4D can be used for forecasting, word processing, data base management, computer-assisted instruction, program development and for thousands of other applications.

    Self-contained and Expandable. The Model 4D is a stylish, self-contained desktop unit with a 12″ built-in 80 x 24 display. A parallel printer interface is included. And the Model 4D expands easily to meet your growing computing needs. Add more memory, one or two more floppy drives and a hard disk.

    Software Flexibility. The Model 4D runs most TRSDOS and LDOS software desinged for the Model 4 and 4P as well as for Model I/III (in the Model III mode). That means a large softwre library is already available.

    Easy to Use. Simply add ready-to-run programs for wrod processing, spreadsheet analysis, data base management and much more and Model 4D is ready to go to work. The two built-in, double-sided disk drives provide 736K of storage (368K each) and has a built-in RS-232C Serial Interface to access information networks by phone (requires modem and cable). Three programmable function keys (F1, F2, and D3) let you take advantage of program-designated operations.

    Advanced Features. The TRSDOS 6 operating system allows you to turn extra memory into a superfast disk drive. This “MemDisk” feature allows for keystroke quick responses instead of time-consuming disk access. A software print spooler lets you print one job while working on another. You can custom-tailor print-outs with the forms command. A Job Control Language makes it possible to set up a whole series of operations that Model 4D can perform unattended. A host/terminal package makes computer communications easy. There are more features for serious programmers too such as routing, linking and filtering. Add our Double Duty utility (26-2231) and you can load two different application programs at once and move back and forth between them.

    Complete Documentation. Model 4D comes with Microsoft Disk BASIC and TRSDOS 6 operating system. An owner’s manual, reference-card, programming manual, and an introductory booklet to help start you computing immediately. U.L. listed. 26-1070 (Avail. 10/31/85)

    Specifications.

    CPU: 4MHz Z-80A (2 MHz in Model III mode).
    Memory: 64K RAM expandable to 128K (provides for disk drive emulation in RAM).
    ROM: 14K ROM.
    Video Display: 80 x 24 (Model 4 mode), 64 x 16 (Model III mode), or double-width 40 or 32 characters per line. Upper and lower case and reverse video (Model 4 mode). 96 text, 64 graphics and 96 “special” characters.
    Keyboard: 71-key typerwriter-style with datapad, plus control, caps and 3 programmable function keys (F1, F2, F3).
    Language: Microsoft 5.0 BASIC.
    Sound: Obtainable from BASIC. Toggled “keyclick”.
    Disk Drives: Two built-in double-sided 368K 5-1/4″ drives.
    External Connections: Cassette operation at 500/1500 baud, Parallel printer port. RS-232C serial port (2-Disk version only). Buffered input/output bus.
    Power: 120VAC< 60Hz.
    Dimensions: 12-1/2 x 18-7/8 x 21-1/2″



    Radio Shack’s Description of the Model 4P [RSC-12]
    TRS-80 Model 4P Get the versatility of our popular TRS-80 Model 4 desktop computer in a compact system you can take anywhere! The Model 4P is easy to carry – weighs just 26 pounds – and it’s small enough to tstow in overhead luggage racks on planes, trains or busses. It’s the perfect computer for our mobile society.

    Use Thousands of Programs. Model 4P can use all Model 4 disk software. It can also run all Model III TRSDOS and LDOS disk programs (in Model III mode) without change. So a huge software library is already available. And Model 4P is compatible with the CP/M Plus operating system which opens the door to literally thousands of applications..

    Big on Features. Unlike some transportables, Model 4P is without compromise. You can depend on it as your desktop computer because of true desktop features. Rather than a small display screen, Model 4P features a full 80-character by 24-line 9″ green-screen display that can be upgraded to provide optional 640×240 high-resolution graphics. The full-size keyboard features CONTROL, CAPS and three function keys. And you can add the internal direct-connect modem board to communicate with other computers and to access information services.

    Superior Operating System. The powerful TRSDOS 6 operating system lets you use extra memory as a superfast disk drive. The result? Keystroke-quick responses instead of time-consuming disk access. The software print spooler allows you to print out a job at the same time you’re using Model 4P for other tasks. A Job Control Language lets you set up a while series of operations for your Model 4P to perform without supervision.

    Thorough Documentation. Model 4P comes with Microsoft Disk BASIC and TRSDOS 6 operating system, owner and programming manuals, reference card, and an introduction to your copmuter that gets you started immediately.

    Who is the Model 4P for? This transportable computer is designed for managers with work that just can’t wait until they return to the office. The compact size of the Model 4P makes it usable anyplace where there’s an AC outlet. Its software flexibility allows almost any task at hand to be performed — word processing, accounting, forecasting, programming, graphic presentations and much more.

    Specifications.

    Microprocessor: 4 MHz Z-80A (2 MHz in Model III mode).
    Memory: 64K RAM, expandable to 128K. Provides for disk drive emulation in RAM, only 64K addressable from BASIC.
    Keyboard: 70-key typewriter-style with datapad, plus CONTROL, CAPS and 3 programmable function keys (F1, F2, F3).
    Video Display: 80 x 24 (Model 4 mode), 64 x 16 (Model III mode), or double-width 40 or 32 characters per line. Upper and lower case. Reverse video (Model 4 mode). 96 text, 64 graphics and 96 “special” characters.
    Language: Microsoft 5.0 BASIC.
    Sound: Obtainable from BASIC. Toggled “keyclick.”
    Disk Drives: Two built-in double-density 184K 5-1/4″ drives.
    External Connections: Parallel printer port. RS-232C serial port. Selectable 300-9600 baud. Buffered input/output bus.
    Dimensions: 16-1/2 x 13-1/4 x 9-3/4″.
    Power: 120VAC, 60Hz.



    Radio Shack Expansion Options/Prices

    Computers


    Item Cat. No. Initial
    Price
    Product Description
    Model 4 Student Station 26‑1059 $1,249.00
    [RSC-11]
    $899
    [RSC-12]
    Now setting up a Network 3 system is easier than ever. This fully-configured student station comes complete and ready to use. Students can load the program they want from the host disk with just a few keystrokes. Student programs can access disk files on the host for storage or retrieval. U.L. listed.

    Includes 64K Memory, Built-In RS-232C Interface and Cable.


    Model 4 with 16KB RAM 26‑1067 $1,799.00
    [B-19]
    $999.00
    [RSC-11]
    $799.00
    [RSC-12]
    An affordable personal computer that’s ideal for beginners and pros alike – easy to use and hard to outgrow. Add a cassette recorder and put the Model 4 to work or play with our library of ready-to-run software. Set up a budget, compose music, create graphics, teach your kids, play games and much more. Model 4 can be used to analyze statistics or turned into an incredibly low-cost word processor. Other languages and utility programs ar also available. An easy-to-follow beginner’s manual makes it easy to learn BASIC programming. Add a printer, plotter, RS-232, telephone interface and more as your needs grow, plus you can expand into a powerful disk-based system. U.L. listed.

    From B-19: The 16K TRS-80 Model4 is the ideal choice for anyone who wants a computer that can later be expanded for advanced programming, business or professional use. It stores programs and data on inexpensive audio casselle tapes (recorder not Included) instead of disks. Learn BASIC programming with the excellent Model 4 beginner’s manual. Choose from our wide selection of ready-to-run software. Set up a household budget. track your stock Investments, teach your kids, and much more! The self-contained white cabinet includes a high resolution 30.5cm monitor that displays 16 lines of 64 characters, a 70-key typewriter-style keyboard with 12-key keypad for numeric entry, parallel printer interface and Model III BASIC in ROM. And as your computing needs grow, upgrade your cassette system to disk-based Model 4 features with a 64K RAM kit and Model 4 drive upgrade kit (intallation required – notincluded).


    Model 4 with 64KB RAM and 1-Disk Drive 26‑1068 $2,799.00
    [B-19]
    $1,699.00
    [RSC-11]
    $1,099.00
    [RSC-12]
    No RS-232C included.

    From B-19: Our 64K two-disk Model 4 is everything you want in a personal computer. There’s a high-resolution 80 x 24 display, keyboard with numeric keypad and CONTROL, CAPS and 3 function keys, new high clock speed (4MHz), parallel interface, and much more. It comes ready to use with thousands of programs, because it’s compatible with Model 4 and Model III TRSDOS, CP/M-Plus, and LDOS operating system. All TRS-SO programs written for the Model III will run without any changes. The 64K (64,000-characters) internal memory is expandable to 128K. To speed operations, there’s “MemDisk”, which lets you create a super-fast disk drive in memory for keystroke-quick responses instead of timeconsuming disk access. TRSDOS 6.0 features a print spooler and communications program. The new Microsoft BASIC includes CHAIN and COMMON for large programs, and more.


    Model 4 with 64KB RAM and 2-Disk Drives 26‑1069 $3,299.00
    [B-19]
    $1,999.00
    [RSC-11]
    $1,299.00
    [RSC-12]
    Includes RS-232.
    From B-19: Our 64K two-disk Model 4 is everything you want in a personal computer. There’s a high-resolution 80 x 24 display, keyboard with numeric keypad and CONTROL, CAPS and 3 function keys, new high clock speed (4MHz), parallel interface, and much more. It comes ready to use with thousands of programs, because it’s compatible with Model 4 and Model III TRSDOS, CP/M-Plus, and LDOS operating system. All TRS-SO programs written for the Model III will run without any changes. The 64K (64,000-characters) internal memory is expandable to 128K. To speed operations, there’s “MemDisk”, which lets you create a super-fast disk drive in memory for keystroke-quick responses instead of timeconsuming disk access. TRSDOS 6.0 features a print spooler and communications program. The new Microsoft BASIC includes CHAIN and COMMON for large programs, and more.

    Model 4D with 64KB RAM and DeskMate 26‑1070 $1,199.00

    Model 4P 26‑1080 $1,799.00 [RSC-11]
    $1,299.00 [RSC-12]
    Completely self contained in a high-impact ABS case with a built-in carry handle. U.L. Listed.

    Expansion Options


    Item Cat. No. Initial
    Price
    Product Description

    Model 4 Internal Disk Drive 0 26‑1127 $1,149.00 [B-19]
    $649.00 [RSC-11]
    $499.94 [RSC-12]
    $399.95
    Includes a 184K 5-1/4″ double-density disk drive with TRSDOS 6 operating sstem, Disk BASIC and manual.

    Model 4 Internal Disk Drive 1 26‑1163 $599.00 [B-19]
    $239.95 [RSC-12]
    $149.95

    Model 4 External Disk Drive 2 26‑1164 $699.00 [B-19]
    $319.95
    $199.95 [RSC-19]
    Each drive adds 184K of data storage to your Model 4. Uses 40-track 5-1/4″ diskettes. Internal Drive #0 required. U.L. Listed.

    Model 4 External Disk Drive 3 26‑1161 $679.00 [B-19]
    $279.95
    Each drive adds 184K of data storage to your Model 4. Uses 40-track 5-1/4″ diskettes. Internal Drive #0 required. U.L. Listed.

    Model 4 64K RAM Kit 26‑1122 $199.95 [B-19]
    $79.95 [RSC-12]
    $69.95 [RSC-16]
    $59.95 [RSC-19]
    Expands 64K Model 4 to 128K. Required for Model 4 cassette-to-disk upgrade. Extra memory not accessible by BASIC.

    Model 4 Upgrade Kit 26‑1123 $1,299 [B-19]
    $399.95
    $199.95 [RSC-19]
    Converts Model III disk computer to a Model 4 disk system (except for cabinet). Includes new keyboard, 64K RAM, TRSDOS 6 diskette with Disk BASIC.

    CCR-81 Cassette Recorder 26‑1208 $59.95 Computer Starts and Stops Recorder Automatically
    Auto-Level Control and Cue/Review
    Cable Included
    Works on AC or four “C” batteries (not included). With battery/record LED. 10-1/2 x 5-3/4 x 1-13/16″. U.L. Listed.

    CCR-82 Cassette Recorder 26‑1209 $49.95 Computer Starts and Stops Recorder Automatically
    Auto-Level Control and Cue/Review
    Cable Included
    Our most compact, lowest-priced recorder. Features volume control with repset and monitor switch. 7-1/8 x 4-11/16 x 15/16″. Requires four “C” batteries or AC adapter (not included).

    High-Resolution Graphics


    Item Cat. No. Initial
    Price
    Product Description
    Model 4 High-Resolution Graphics 26‑1126 $429.95
    [B-19]
    $249.95
    [RSC-12]
    $219.95
    [RSC-19]
    An easy way to create business graphics, tables, charts, maps, animation and more. 640 x 240 resolution. Requires a minimum 64K 1-Disk Model 4. Installation required (not included).

    B-19: Create sophisticated business graphs, tables, charts … even animation. Provides 153,600 picture elements (640 x 240) for amazing detail. The Graphics BASIC command structure is incredibly powerful (draws lines and circles, fills spaces). yet easy to master. Also lets you use assembly language subroutines. Includes user’s manual and diskette with Graphics BASIC and subroutine library. Available January 1984.


    Communications Hardware


    Item Cat. No. Initial
    Price
    Product Description
    Model 4P Modem Board 26‑1084 $149.95 Direct-connect auto-dial/auto-answer 300 bps modem features full/half-duplex and originate/answer modes. Completely software compatible with our Direct-Connect Modem II (26-1173). User installable.

    Model 4 RS-232C Serial Communications Board and Cable 26‑1148 $159.95 [B-19]
    $99.00 [RSC-12]
    $79.00 [RSC-17]
    $49.95 [RSC-19]
    Allows you to communicate with information networks and other computers by telephone. Send/receive electronic mail, access builletin boards, and much more. Requires modem and software. Installation required (not included).

    Hard Disk Kits


    Model 4 5MB Hard Disk Kit (Primary) 26‑1130 $3,999.00 Get high-speed access to five million characters of programs and data. Fully compatible with most Model 4/III software. Store over 1,000 different files or create files as large as available space. Backup to multiple floppies. Primary drive includes Hard Disk Operating System with BASIC.

    Model 4 5MB Hard Disk Kit (Secondary) 26‑1131 $3,499.00 Add up to three for a total of 20 megabytes storage.

    Model 4 15MB Hard Disk Kit 26‑1134 $79.95 Includes cable, software and manuals for use with either our 15 or 10-Megabyte Hard Disk System. Requires 64K 1-Disk Model 4.

    Model 4 10-Megabyte Controller 26‑1138 $449.95

    Miscellaneous


    Orchestra-90 26‑1922 $79.95 Create highly sophisticated electronic music and sound effects. Both musicians and non-musicians can compose in six octave ranges in up to five voices. Transcribe sheet music, too. Includes cassette software and an interface that connects your home stereo to the Model III/4 computer. Plays programmed sounds only.

    Model 4P Travel Case 26‑1085 $24.95 Heavy-duty black vinyl case resists scuffs and tears. Foam-padded bottom protects against drops. Inner pocket for manual and diskettes.
    Network 4 Operating Software. 26-2773 $230.00 The Network 4 Shared Learning Svstem will add flexibility and economy to your computer lab or classroom. Our new Network 4 System incporates some of the most advanced networking techonology available to make shared computer learning possible for large groups. Using a twisted pair cable, the Network 4 lets you connect up to 63 TRS-80 Model III or Model 4 computers to a central host computer with a hard disk drive. The student stations can then share the hard disk, each station operating virtually as a stand-alone system. Each user can quickly access a set of teacher-designated programs and data from the hard disk. Information can be sent from station to statsion without using the hard disk and reports can be printed on a printer at the host computer.

    How it Works. The storage capacity of the host computer’s hard disk drive is divided into “volumes” to serve as diskettes for storage by the individual stations. Students in the network can use up to four of these volumes at any time for class activities. Teachers use the system manager’s program to create student “accounts.” These accounts allow students various levels of access to the teacher-specified volumes.

    Network 4 System Requirements. A Network 4 system requires a Model 4 host (requires Master Upgrade Kit), a 15-megabyte hard disk, Network 4 Operating Software, cables and 64K Model 4 student stations. Model III or Model 4 systems can be upgraded with a Student Station Upgrade Kit.

    Network 4 Operating Software. This specially designed operating software enables student stations to access the hard disk drive and printer of the central host computer. Software includes a program that executes in the host computer and a modified version of TRSDOS 1.3 (with BASIC) to execute in the stations

    Network 4: Student Station 26-1058 $1099.99
    Network 4: Master Upgrade Kit 26-1136 $299.95 Requires Installation (not included).
    Network 4: Student Station Upgrade Kit 26-1137 $299.95 Requires Installation (not included).
    Network 4: 100-Foot Trunk Cable 26-1218 $16.95 Includes termination.
    Network 4: 500-Foot Trunk Cable 26-1214 $69.95 Includes termination.
    Network 4: 1000-Foot Trunk Cable 26-1215 $119.95 Includes termination.
    Network 4: Tap Box 26-1216 $9.95
    Network 4: Tap Cable 26-1217 $9.95

    Software


    TRSDOS v6.2 Utility 26‑0315 $39.95
    [RSC‑19]
    TRSDOS v6.2 26‑0316 $39.95
    [RSC‑19]
    Target PlannerCalc 26‑1512 $99.95 Now you don’t have to learn to program to use a spreadsheet! PlannerCalc’s easy-to-use design eliminates the need for an extensive user’s manual. Create your own financial models by entering and processing data by column, row, or individual location. The program offers you a wide variety of mathematical operations, including conditional commands. And best of all PlannerCalc is a spreadsheet program that uses plain English formulas instead of the more complex algebraic formulas. For example, an obscure equation line “A=500″ cabe be written as “LINE 1 WIDGETS = 500.” And a “Help” screen that details an operation is available by simply pressing the question mark key. You can vary the width of columns from 2 to 30 characters and split the display horizontally or vertically for easy data comparison.
    pfs:report 26‑1517 $99.95 Produces reports from files created with pfs:file.
    pfd:file 26‑1518 $124.95 Create and organize your records according to your own specifications! With pfs:filem you get an easy-to-use personal filing program that works like a paper filing system but without the paper! You decide how your records are to appear by simply organizing information on “forms” that you design right on your display screen. Form layouts can have as much or as little structure as you wish. The advantage? Store, retrieve and review information in a fraction of the time it would take with a conventional filing system. Once you’ve created the basic form, all you do is fill in the blanks. Enter data in any order that you like. Retrieval is not limited by the order in which the information is stored. And you can change the original form design without having to re-enter the data. pfs:file can be used in various applications: business, professional, home and education.
    Enhanced Visicalc 26‑1520 $349.95
    [B25]
    This versatile management and engineering planning tool takes advantage of Model 4′s 128K memory capacity and 80 x 24 display screen to handle large spreadsheet analysis problems. You simply define the formulas, enter the figures and VisiCalc performs all calculations automatically. Change any value or formula, and VisiCalc instantly updates every related number! You can view countless ‘what if … ? ‘ situations in seconds. Enhancements include an entry editor to modify formulas and labels without reentering them, and logical and relational operators to perform testing and branching. Optional printer allows printing of any portion of your worksheet.
    Formation Forms Management System 26‑1527 $199.95 Now you can quickly and easily complete such forms as insurance clalms and loan applications. It’s the perfect solution for businesses that continuously filling out preprinted forms. To start, you first “create” the form on the display by typing in the questions and setting the print positions of the answers. Then each time you use this form. you’ll merely type in the answers on the display screen. Your answers are then printed on the preprinted form in perfect position!
    Multiplan 26‑1530 $269.95
    [B25]
    $199.00
    An incredibly easy-to-use decision support tool. Multiplan lets you consolidate related worksheets so that information is transferred between them automatically. All prompts are full length words or phrases. Plain English names can be assigned to any column, cell or area. If you have any questions, an On-Line Reference Guide knows where you are in Multiplan and offers information related to your problem. With Multiplan, up to eight display windows can be created on the screen simultaneously. Sorting can be performed in alphabetical or numerical order. Vary individual column widths, center numbers and text within a column and align decimals. Format your own reports, too. Multiplan can also directly utilize your current VisiCalc files. Includes tutorial manual.
    Apartment Management System 26‑1538 $299.95 An efflclent and easy-to-use system designed to provide property owners and managers with rapid and accurate monitoring of apartment complexes. Maintains a history of prior payments for each apartment. Divides monthly rental charges into user-defined categories. Produces many financial and problem reports on reauest. Provides a printout of all transactions that can be used as an accounting audit trail. Provides month-end income totals. Maintains a history or repair orders and other notes regarding maintenance on apartments. Stores up to 450 apartment units on each diskette. Prints mailing labels. Requires Model 4 with three floppy drives or Hard Disk.
    W-2 Writer 26‑1539 $49.95 For use with the Payroll system. Using the information already collected on the Pavroll data diskette, W-2 Writer saves vou time by printing W-2 forms customized to fit your needs.
    General Ledger 26‑1540 $199.95 Makes small business accounting procedures faster and easier. Maintains accurate records of all bookkeeping transactions and provides a balanced ledfer. Use General Ledger alone or interface with the Accounts Receivable, Accounts Payable and Payroll programs for a complete, interactive accounting system. Handles up to 100 accounts and 1150 monthly transactions. Generates easy-to-read financial reports, including Trial Balance (with or without a worksheet), Income Statement, Balance Sheet, General Ledger, Account List with all accounts (or a specified range of accounts and their current-period and year-to-date balances. Posted Transactions Report and Unposted Transactions Report for the current period. Computes up to five levels of totals and two levels of headings for financial statements. Provides each accoun’ts end-of-period balance for the previous fiscal year’s 12 periods, as well as each account’s end-of-period balance for all complete periods of the current fiscal year. Lets you compare current year figures with previous year figures on the same balance sheet or income statement.
    Accounts Receivable 26‑1541 $199.95 A balance forward system which provides rapid and accurate monitoring of sales and incoming funds. Interfaces with General Ledger – all transactions are summarized and the totals are automatically posted to General Ledger. Offers seven standard General Ledger accounts, plus 10 user-definable accounts. handles up to 2000 transactions per month with up to 150 customers on file. Reports include Unposed Transactions, Posted Transactions, Customer List, General Ledger Account List, and Aging Report on selected customer accounts. offers optional use of minimum payment amount on statements, and optional late charge processing (compounding option also available). You can print mailing labels, statements, an Aged Trial Balance for audit purposes and a General Ledger report.
    Accounts Payable 26‑1542 $199.95 Automatically posts transactions and payments to General Ledger program. Handles up to 1100 transactions, 75 vendors, five General Ledger expense distributions per invoice and 14 invoices per check. Includes four General Ledger accounts, plus 10 user-definable accounts. Calculates due dates, discount dates and discount amounts by vendor payment terms, Prints Uposted Transactions List, Transaction Posting Report, Vendor List, Open Items List, Cash Requirements Report, Vendor Mailing Labels, G/L Account List, G/L Distribution Report, Check Review Report (for verification before check printing), Checks, Check Register and Payment Posting Report.
    Payroll 26‑1543 $199.95 Tracks earnings, deductions and taxes for each employee. as well as employer contributions such as FICA, FUI, SUI and more. Interfaces with the General Ledger program. You can customize your system in accordance with local, state and federal tax laws. Processes up to 80 employees, each with up to nine earnings and nine deductions categories. Handles payroll tasks for up to three states simultaneously. Earning/Deduction types allow changing amounts for employees, taxed or exempt. Also define categories for FLSA and EEOC reporting, keep historical records by period, quarter and year, and more.
    Invoice Writer 26‑1544 $49.95 Provides a rapid and accurate method of creating invoices using the up-to-date information contained in the Accounts Receivable system. Automatically computes taxes and discount rates that are defined by you. Requires Accounts Receivable.
    Inventory Control 26‑1545 $199.95 Designed to make inventory control easler and more accurate. Produces a reorder report showing items below assigned reorder level plus an on-hand listing of items. Prints ten major reports, plus nine custom reports designed by you. Prints purchase orders and labels. Allows physical inventory count to be taken by cycle and lets you automatically reorder stock. Provides customized reports using the SORT utility. Processes up to 100 vendors, 50 purchase orders, 1200 inventory items, and 350 purchase order line items.
    Enhanced VisiCalc 26‑1569 $99.95 This versatile management and engineering planning tool takes advantage of Model 4′s 128K memory capacity and 80 x 24 display screen to handle large problems. You simply define the formulas, enter the figures and VisiCalc performs all calculations automatically. Change any value or formula, and VisiCalc instantly updates every related number! You can view countless “what if. . . ?” situations in seconds. Enhancements include an entry editor to modify formulas and labels without reentering them, and logical and relational operators to perform testing and branching. Optional printer allows printing of any portion of your worksheet.
    SuperSCRIPSIT 26‑1595 $199.00 Includes all the word processin features of Model 4 SCRIPSIT and more. SuperCCRIPSIT supports proportional-spaced printing, multiple line spacing, underline, boldface, super and subscripts, multiple columns, full 80 x24 display format and reverse video to aid in editing.
    Disk Scripsit 26‑1596 $99.95 A low-cost. easy-to-use word processing program for Model 4. Lets you prepare memos. letters, reports and manuscripts right on the screen – displays a full screen of text in an 80-character by 24-line format. Multiple edit features let you delete, insert and move blocks of text. Then print as many correction-free copies as you wish with an optional printer. lncludes all the standard features that have made SCRIPSIT an outstanding word processing program for years. There’s a “global search” mode to find phrases or sentences that you want to alter or delete. Also features reformatting, hyphenation, centering, headers, footers, justification, margin and tab settings, automatic page numbering and more. With comprehensive learning manual and quick reference card.
    Videotex Plus 26‑1598 $49.95 Videotex Plus is composed of three major modules: the primary communication program, a specialized program for use with “store and forward” information services and a module that lets you create and edit log-on sequences and save them on diskette for later use with the special automatic log-on procedure.
    SCRIPSIT Spelling Dictionary 26‑1600 $99.95 Automatically checks text prepared with SuperSCRIPSIT for misspellings. Contains 73,000 words. Add your own user list.
    Profile 4 Plus Filing System 26‑1635 $249.95 Create your own personallzed electronic filing system! Profile 4 Plus offers you many possibilities for manuipulating data you enter. You can store almost any type of information, then retreieve it at the touch of a key. Managers can keep track of price lists, business inventories, vendor and customer records, personal projects and more! And this enhanced version of Profile for the Model 4 has many new features that make it easy to develop your own specialized system. A full-screen Define Files program makes it easy to create and change fields, even after the file is expanded. Sort and select records by any field in any segment of the file. And sorting is extended over all available disk space – not just RAM. Features indexing for faster sorting and selection. Sort by up to five fields – in ascending or decending order -to a maximum of 85 characters. And you can select records using up to 16 dlfferent search criteria. Mass operations are accessed via indexes. as well as the regular scan operation. Indexes for report and label printing, and SuperSCRIPSIT and VisiCalc selections. A built-in math package can perform arithmetic operations – such as calculating taxes, extensions and totlas – among several fields and then update another field automatically. Stores up to 700 records of 255 characters in length on a 2-disk data base. 2900 with 4 disks. Create up to 36 different reports and 36 different sets of mailing labels for each file. Design reports and labels up to 200 characters across and 99 print lines down. Up to ten different screen formats for each file. Up to 36 SuperSCRIPSIT and VisiCalc spin-off file formats per file for reports and form letters. Comes with easy-to-understand tutorial manual.
    TK!Solver 26‑1630 $299.95 Makes it easy to solve mathematical problems. You simply enter one or more equations and then the program solves them. Ail the tools needed for problem-solving are built into the program, including matnematical functions, facilities for converting units of measurement and the ability to produce graphs and tables (with optional printer). TK!Solver can solve a broad range of problems using models and equations with variables of known and unknown values. Given a model and known values of variables, the TK!Solver program solves for as many unknown values as is possible. The program’s problem-solving ability is powerful and versatile enough to apply to many fields, from fianncial planning to architectural design to chemical analysis. You can also use it in conjunction with the SolverPacks below for special applications. Requires 128K Model 4.
    Finance Solverpack 26‑1631 $99.95 For use with TK!Solver for problems in financial analysis. The topics include conpound interest, net present value, level debt service, cost of equity capital, analysis of financial statements, stock option pricing, bond swaps, convertible debt and bond refunding decisions. Requires TK!Solver.
    Science Solverpack 26‑1632 $99.95 Covers a wide range of tipocs in introductory science at a level comparable to American secondary schools. Covers topics in chemistry, biology, physics, thermodynamics and population studies. Requires TK!Solver.
    Mechanical Engineering SolverPack 26‑1633 $99.95 The topics include analysis of elsatic beam bending, springs, area moment of inertia, Mohr’s circle, rotational systems, heat transfer, fluid flow and hydralics. Requires TK!Solver.
    13 Ghosts 26‑1927 $19.95 Armed only with your “Ghost Blaster”, you’re out to de-spook a Ghost Town. You’ll encounter a skeleton that’s immune to your blast and a “laughing ghost” with an annoying knack for waking up dangerous ghoul friends. You’ll be lucky to get out alive!
    Computer Diplomacy 26‑1957 $19.95 A realistic game of strategy and international politics. You command one of the seven great powers of Europe prior to World War I. You seek to control the continent through careful planning and by negotiating alliances with other players. For up to seven players.
    Zaxxon 26‑1956
    Disk
    26‑1960
    Tape
    $29.95 Bring the popular arcade challenge home to your Model 4. Advance from “Rookie Pilot” to “Combat Ace Pilot” as you enter the floating fortress, destroy enemy defenses, and finally defeat the mighty robot, Zaxxon. Add an optional amplifier for great sound effects
    Frogger 26‑1958
    Tape
    26‑1959
    Disk
    $19.95 A licensed version of the original arcade game. Get your frogs safely across the road. Then guide them to their lily pads on the other side of the river. Optional computer-generated music requires mini amplifier.
    Assembly Language Development System 26‑2012 $149.00 Powerful package that’s a necessity for the assembly language programmer. With full screen Editor, Assembler with sorted cross-reference listing, Linker for creating an absolute file, atuomatic File Transfer, and Debug modules. offers numerous important and helpful features and includes TRSDOS 6 and Model III TRSDOS 1.3 support.
    TRSDOS 6 Training Course 26‑2019 $749.95 A comprehensive course in using TRSDOS 6 on your Model 4.
    BFBLIB BASIC Routines Diskette 26‑2021 $19.95 Supercharge your programs with these 121 subroutines, functions and utilities described in BASIC Faster and Better & Other Mysteries. Modify routines or use “as is”.
    Construction Estimator 26‑2025 $49.95 Provides builders, appraisers. real estate developers and insurance adjustors with time-saving and competitive building information. Includes three templates for use with VisiCalc on one diskette: Quantity Suwey (cost) Method. Square Foot Method and Unit-in-Place Method. Estimates construction costs. property values and individual component costs. Compares material and lumber suppliers, material and cost differences, plus actual and estimated costs. Automatically calculates cost difference between suppliers, percent of monies expended, completion percentages, savings realized by item. individual item extensions, cost savings realized by item, individual item extensions, cost savings and/or cost overages. Features automatic recalculation of entries and customization of worksheet to your specific needs. Provides for tax calculations, sales commissions, loan points, bank draws. Home Owner Warranty. advance requested, plus many personalized categories. Gives you more cost-effective and efficient use of your bidding time.
    Graphics-90 26‑2027 $39.95 A complete graphics and animation program. Now you can easily create your own games in BASIC that are equal to many machine-language games! Create state-of-the-art pictures and animation sequences with your Model III or 4 and display the images in random or sequential order. Print graphics on any Radio Shack dot-matric printer with bit-image capability. Two disk drives are recommended for best graphics.
    COBOL-4 26‑2203 $199.95 Based on the ANSI ’74 standard, COBOL is an English-oriented programming language designed primarily for developing business applications on computers. Features single-step compiler multi-key ISAM, COBOL editor and DEBUG> A listing of the program is generated showing the original source statements, error information, data allocation, interactive DEBUG information and optional cross-reference of all program labels and data items. Includes 297-page manual.
    BASCOM-4 26‑2210 $199.00 Feature packed for fast compilation of Model 4 BASIC programs. BASIC compiler lets you execute faster than the same interpreted programs, and require less memory. Includes compiler, linker routine library and run-time package. Source-code security is provided.
    Alcor Pascal 26‑2212 $249.95 Alcor Pascal is a full Pascal implementation. For speed and efficiency, the compiler generates a pcode (pseudo code) that can be interpreted, or further translated into machine instructions for execution directly by the hardware. For added space, an optional pcode optimizer reduces a program by 10-30%. For added speed, an optional native code generator converts the p-code to machine language. Resulting code executes between three and five fimes taster than the pcode. Object code is portable, so you can compile programs on one system and execute them on another. Includes compiler, interpreter, linking loader for building libraries of commonly-used routines, full-screen text editor. large library of routines, extensive string routine library, and a documentation package which includes a Pascal tutorial with 500-line data base program.
    CP/M Plus 26‑2216 $149.95 A valuable addition to Model 4, CP/M Plus is designed for the business user. It supports thousands of existing CP/M programs, including popular word processing, spreadsheet analysis and database management programs. CP/M Plus is easy to learn and even offers a HELP facility. It’s upward compatible with CP/M 2.2, but has many new features — including a high-performance file system. In addition, CP/M Plus automatically logs in a disk when it detects a media change. For easy file selection, time and date stamping options allow the user to record in the disk directory two entries for time and date stamps for each file. No additional hardware required.
    CBASIC 26‑2217 $99.95 A super-efficient business language that complements application development under CP/M Plus. CBASIC works as a complier/interpreter that uses random access memory more efficiently. That means more memory for the application program. Source code is compiled by CBASIC into an intermediate file composed of psuedocode (p-code) instructions. During program execution, the CBASIC run-time monitor interprets each P-CODE instruction and performs the operation. CBASIC provides two types of files for maximum flexibitlty: fixed record length files and stream input/output files. CBASIC also includes native code compilation, relocatable code, convenient linkage to assembly programs, string lengths to 32,000 bytes, debugging capabilities, cross reference lister, support for multi-user operating systems and more.
    FORTRAN-4 26‑2219 $99.95 Write programs in FORTRAN using EDIT-80, a powerful editor with commands for interline and intraline editing. Compiler reads your FORTRAN source program from diskette, translates it into relocatable object code and saves it on diskette. Linker lets you input the relocatable object program, execute it, and save it on diskette as a TRSDOS command file. Assembler lets you create relocation assembly language subroutines that you can link to your FORTRAN program. Includes 250 page manual.
    TRS-80 Model 4 C Programming System 26‑2230 $249.95 A complete implementation of C language for program development. The library routines are Unix-compatible, making it easy to transport programs from other computers to the Model 4 – or vice versa. Includes a powerful, programmable full-screen text editor. You can map editor commands to the Model 4 keyboard as desired and define your own editor commands. The TRS-80 C compiler generates a very efficient and compact object code. TRS-80 C programs will execute 10 to 50 times faster than BASIC programs. The compact size of the object code lets you develop large programs without overlays or chaining. Also compatible with TRS-80 Pascal. You can call functions or procedures written in Pascal from a TRS-80 C program or vice versa.
    TRSDOS 6.2 26‑316 $39.95 Operates 20% faster than TRSDOS 6.1 Features a HELP utility for all commands. Features user-definable system calls and many technical enhancements. Includes replacement pages for the Technical Reference Manual.
    TRSDOS 6.2 Utilities 26‑315 $39.95 Includes Quick Format and Backup that lets you make a backup in less than one minute. The BASIC Answer which allows use of labels instead of line numbers in BASIC while programming; Mod 324 which simplifiesconversion of Model III BASIC programs for Model 4 BASIC; UNKILL to recover killed porgrames; BSORT for sorting from BASIC with tax variables; and COMP which compares two disks or files for a match. Requires TRSDOS 6.2.
    DoubleDuty 26‑2231 $69.95 Divides your computer’s 128K memory into three complete and and independent partitions. Partition one and two each operate like a 64K Model 4. You can load and execute any Model 4 program designed to run on a 64K system into each partition. You can also run BASIC or TRSDOS commands in either partition. In addition. you can use Partition 3 to execute TRSDOS library commands. It’s like having two separate Model 4′s! Since most Model 4 programs require no more than 64K, DoubleDuty takes advantage of your system’s increased memory capacity. And because DoubleDuty takes up almost no memory itself, it is able to more than double the system’s operating potential. For example, you could load the SCRIPSIT word processing program in Partition 1, and an electronic filing program in Partition 2. While typing a document in SCRIPSIT, you discover that you need data stored in the file program – you simply move to the file program, find the information, and return to SCRIPSIT. You may reference the TRSDOS directory for information – all without disturbing the your document. Designed to sue your fill memory capacity for convenience and speed. Requires 128K Model 4 or a Model III modified with Model 4 Upgrade Kit and the Model 4 64K RAM Kit. DoubleDuty may not be compatible with all Model 4 programs. Communications may not be used with DoubleDuty.
    Font Editing Package 26‑5334 $24.95 Use your TRS-80 Model 4 to create your own type styles that can be printed with the DMP-2100P. Easy-to-use package includes loading and editing programs, plus utilities to customize your own drivers. Starter fonts include Letter Gothic, Bold PS, Italics PS, Italics Micro, Modern Micro, Cursive Script, Olde English, Games (chessboard and men; card suits), and Shadow (8-pitch block characters).



    Accessories
    Keyboard Cover 26‑1342 $12.95 Protect your Model III or 4 keyboard from dust and dirt when not in use. [Keyboard Cover]
    CR-510 Card Reader 26‑1266 $1,595.00 [RSC-12] Administrators, teachers and students can benefit from this TRS-80 input device. Use with Radio Shack School Adminuistrative Softwar Product Series to expedite administrative chores, grade, attendance and scheduling functions. The CR-510 provides single, demand or continuous feed operation and is controlled through manual switches or software. Cards must be at least 6 inches in length, and can be either marked or punched (with standard keypunch). Special-oprder Card Holder allows cards up to 14 inches to be read. Included with the CR-510 is a comprehensive owner’s manual, diagnostic test card, packet of 200 general purpose cards, and diskette with COBOL and BASIC driver routines. Requires TRS-80 computer with RS-232C port. Cables available separately.

    More information about the CR-510 Card Reader can be found Here

    9 Responses to “TRS-80 Computers: TRS-80 Model 4”

    1. Duane Williams says:

      Looking for pinout of the RS232 port on the bottom of a TRS80 Model 4, and the parallel port on the some machine.

      There are two ports (edge connectors) on the bottom, one printer, the other serial.

      Would you happen to have that info?

      Thanks

      djw

    2. Fun perusing your website. I am a TRS80 Model IVD user (active)with MFM Hard drive in custom build set up. I aquired the inventory of 2 RS vendors years ago thus have a life long supply of Hardware. Software, we’ll I write my own in BASIC to run my office. MY biggest concern is a printer. Several years ago I found a replacement printer (DWP 410 …which is one of the fastest daisy wheel printers you’ll ever see) while searching the web and it is still huumming along. I recently had to re-ink the ribbons and I was successful.
      Anyone is welcome to contact me if you need help tracting down “working” parts (hardware, software and OS).
      Mitchell (cell 510.367.8475)

    3. Don C says:

      I have a model 4P and what I believe is a Radio Shack 5MB external disk (not the white one, black).
      I’d like to get the hard disk unit connected to the 4P and working. Do I need any additional
      ROM’s, software or hardware or is all that’s needed a cable?
      Feel free to email me at caprio (at) uxpro.com if you know how to do this.
      Thanks.

    4. hebintn says:

      I have a 4P that I would donate to a hobbiest. All I want is the cost of shipping. It was operational when it was put in storage. I may have disks somewhere? If I can find them I’d throw them in.

    5. Lars Locken says:

      Hebintn,

      I’d love to have another 4p! I used to be a RS Computer center manager back in the 80′s. I still maintain a small collection of equipment including color computers, model 3 and 4′s and 5 and 15mb external hd’s. You can reach me at larslocken@gmail.com. Thanks -Lars

    6. SRB says:

      Amazing stuff, owned the silver Co-Co II and the model IV.
      It’s was a super system for the time, and they should commemerate it by creating a 30th or 40th anniversary
      “TRS-2K80 Deskmate” computer system ( usual ‘COTS’ based)
      for exuberant TRS-80 fans ( who would’nt purchase a hyper-threading x64 based system with that silver or white classic style (and peripherals) that looked like that -&-
      a green “TRS-2K80 Dos” boot-menu start-up screen…))
      …just a crazy (nutbar) dream… Have a great day fans!

    7. Dean says:

      Does any one have a TRS-80 Model 4D (26-1080) in working condition for sale? Please contact me at dnotarnicola@gmail.com

    8. Dano says:

      I just bought a TRS-80 model 4.
      I formatted a disk in drive#1 while keeping TRSDOS in drive #0.
      After writing a program in BASIC, I was unable to save it to a disk in the destination drive#1??
      Do I need to specify the drive (if so, how?); I typed Save “name of file”.BAS, but it did not work….
      I was also unable to make back-up disks of TRSDOS??
      Do you have any copies of TRSDOS that I can buy??

      Thanks, Dan

    9. You will also need to pull the cloths washer away from
      the wall and drain the water that is trapped within it into a pan too.
      Opera Mobile has become the browser of choice for the majority of Win – Mo users in this time, to the point
      that the majority of mobile phone providers supply Opera
      pre-packaged. Websites have their own issues, with performance and rendering.

    Leave a Reply

    [Ira Goldklang's TRS-80 Revived Site is proudly powered by WordPress.]