TRS-80 Pocket Computer – PC-1


[PC-1] [PC-1]

Radio Shack Product Description (RSC-4)

           Another Computer Breakthrough from Radio Shack

Radio Shack puts big computing power in the palm of your hand with the amazing new TRS-80 Pocket Computer, the first complete, portable copmuting system you can program in BASIC. The Pocket Computer can solve problems, process data, assist with decision-making, teach, and even entertain – at a low price that seems all the more incredible once you’ve explored its exiting features

You Don’t Have to be an Expert

If you’ve never operated a computer, don’t worry, because calculations on this “pcketable” TRS-80 are as simple as using a calculator – or you can use our cassette software that’s ready to run. The Pocket Computer had built-in arithmetic functions you can put to work immediately, simply by pressing the ON key. You can work with large numbers – up to 10 digits (mantissa) and 2-digit exponents. And using trig and angular functions is just as easy because they are also built in.

The real power of the TRS-80 Pocket Computer comes from its ability to run programs, either yours or ours. It accepts your instructions on “how to do the job” in BASIC – an English-based computer language used by experts and beginners alike for a wide range of jobs. In fact, Pocket Computer BASIC is very similar to TRS-80 Level 1 BASIC, with the addition of 15 arithmetic functions.

You can program the Pocket Computer to do almost any of the smaller jobs that the TRS-80 microcomputer can do, except those requiring graphics capability. Program it to file a stock portfolio or to calculate business, engineering or scientific problems. Programs can be saved on cassettes (with the optional cassette interface and recorder), or left in memory for as long as needed.

Each program in memory can be identified with a single key label and run simply by pressing the specified key. Programs can accept words and names as data (strings of up to 7 characters) for storage in memory,and even sort or search for them. The 1424 step memory is automatically partitioned for program and data storage, and there is a 26 data element memory and a 48-step reservable memory for storing frequently used functions.

You simply switch to the RUN mode to run your program or programs from memory – several can be stored at the same time. Your programs can display prompts in plain English for inputs and display answers with explanations.

Both an Edit and Debug mode are provided so the TRS-80 Pocket Computer is much easier to program and use than any programmable calculators. If you own a programmable calculator compare it to our Pocket Computer. You may never use your calculator again!

The keyboard arrangement includes 37 keys for alphabetic input and special functions, most having a dual function when used with the Shift key plus a 20-key section for numeric input, numeric functions mode and editing. The big 24-character alphanumeric LCD has easily readable 3/8″ high characters plus eight smaller mode indicators.

For scientific and engineering uses the Pocket Computer is accurate to 10 digits and can handle numbers with exponents of 10 to the 99th power to 10 to the -99th power. Built-in arithmetic functions include trigonometric and inverse trig with readout in degrees, radians or gradians, log, exponent, square root, angular conversions, integers and absolute values.

Power for your TRS-80 Pocket comes from 4 easy-to-replace long-life mercury batteries (available at Radio Shack). An automatic power-off feature saves battery life if no entry is made after 7 minutes. Programs and data are saved in permanent memory for instant recall.

The optional cassette interface holds the Pocket Computer and allows you to store or enter multiple programs and data. There are already eight Radio Shack program packages available and many more on the way.

Make Your Pocket Computer a Complete System

The TRS-80 Pocket Computer Interface and Minisette-9 Recorder allow you to save and load your own porgrams, or use Radio Shack’s pre-recorded Pocket Computer software. Designed for portability and ideal for use at home, office, school or anywhere you travel.

Cassette Interface. Connects your Pocket Computer to a cassette recorder. Includes cable and plugs to fit the Minisette-9 and most other compatible recorders. The Cassette Interface enables you to store and save your programs while changing batteries. Requires three “AA” batteries. 3-1/2 x 8-1/4 x 7-8″.

Minisette-9. Ultra-slim, compact design makes it perfect for use with the Pocket Computer. Features end-of-tape Auto-Stop, 3-digit tape counter, LED record mode/battery condition indicator, built-in mike. 1-5/16 x 7-3/16 x 4-9/16″. Requires four “AA” batteries.

Combination Printer/Cassette Interface

Now you can get a hard copy printout from your TRS-80 Pocket Computer! This affordable, dot-matrix impact printer is so compact, you can take it with you wherever you go, whether you’re travelling, attending meetings, working out in the field – anywhere you need on-the-spot data. Just slip your Pocket Computer into the recessed port and you’re ready to print or list 16 characters per line at one line per second. Long program lines automatically “wrap around” to the next line.

If you write your own programs, a printed listing of the program is a real help in developing and debugging software. The printer uses inexpensive rolls of 1-3/4″ wide cash-register-type paper and an inexpensive long-life ribbon. Printing is approximately one line per second, and you can print about 8,000 lines on one battery charge.

But that’s not all. We’ve combined a cassette interface in the same portable unit! The cable is provided to connect a standard audio cassette recorder like our recommended Minisette-9. The recorder lets you save and load Pocket Computer programs and data on inexpensive cassette tapes.

With the Printer/Cassette Interface and a cassette recorder, your Pocket Computer becomes a complete, portable, and highly versatile computer system.

Controls include paper advance, power on/off, print on/off, and remote (for keying recorder “remote” jack). Also a “low battery” indicator. Comes complete with rechargeable batteries and a U.L. Listed AC adapter/charger – Printes about 8,000 lines per battery charge. Also includes three rolls of paper, easily replaceable ribbon cartridge, cassette cable and manual. 1-3/4 x 11-1/8 x 3-3/4″ (with Pocket Computer installed).

Software for the TRS-80 Pocket Computer

Each software package includes a comprehensive, easy to understand manual. All require the Cassette Interface and compatible cassette recorder.

Business Financial. With this package of seven programs, the TRS-80 Pocket Computer becomes a powerful decision-making tool for professionals in the field of finance. The Days and Date program will calculate the number of days between a reference date and a second date, or will find the resulting date when any number of days are added to, or subtracted from the reference date. The Loans and Annuities program uses four primary variables: amount of loan, payment, number of payments, and annual interest rate. Given any three of the variables, it calculates the fourth. A fifth variable, periods/year, permits the user to specify any number of payments per year. Other programs in the package are Future Value, Bond Price and Yield, Internal Rate of Return, Compound Interest, and Depreciation. Catalog Number 26-3517 – $19.95.

Statistics for Business, Marketing and Sales. Consists of seven programs for analyzing data, and one program containing eight formulas useful in making business decisions. The Forecasting program is useful inmaking predictions from measurements taken over a specific period of time (months, weeks, years, etc.). The Seasonal Variation program calculates adjusted monthly or quarterly seasonal indices using the ratio-to-centered-moving average method.

Moving Average. A data set of up to 60 values can be averaged. The number of data points comprising the moving average can be changed without having to re-enter the original data. Normal/T/F Distributions. Given a mean, a standard deviation, and a value for X, this program returns the corresponding Z score, the value of the normal density function f(X), the cumulative percentile P(X), and the area under the normal curve between X and the mean. Calculates one-tail or two-tail prohabilities for the t distribution, given a t value and the degrees of freedom. Package also includes programs for Descriptive Statistics, Multiple Regression, and Gompertz Curve Analysis. The Management Decisions program provides ready-to-use formulas for break-even analysis, optimum order quantity, make vs. buy, profit margin, markup, price elasticity, manufacturing cost curve, and random sample. Catalog Number 26-3516 – $19.95.

Real Estate. Especially created for the real estate investor and agent. This package includes: annuities, compound interest, depreciation calculations, cash flow analysis, and residential purchase analysis. Depreciation calculations include straight line, declining balance, and sum of the year’s digits. A “must” for anyone involvedin real estate-time saver! Catalog Number 26-3510 – $24.95.

Aviation. A complete flight management system which provides the basic equations and conversions used by the pilot. Converts: Temperatures from C to F and from F to C; Distances in statute miles, mautical miles, and kilometers; Liquid measures in U.S. gallons, Imperial gallons and liters. Calculates: True Altitude based on pressure altitude; temperateure, and reference altitude; True Airspeed based on pressure altitude, temperature and indicated airspeed; Mach Number based on true airspeed and temperature; True Airspeed based on Mach number and temperature; Off-Course Correction and drift angles; True Headings and ground speed with winds; and Enroute winds. Ideal as replacement, backup or double-check of conventional slide-rule flight computers. Catalog Number 26-3513 – $24.95.

Civil Engineering. Makes the TRS-80 Pocket Computer a valuable “on-site assistant.” Programs include Simple Beam Computations, Column Buckling and ASIC Column Formulas, Stress in Cylinders and Bolt Torque, Cantilevered Beams, Vector Computations, Fixed Beam Computations, Section Physical Characteristics. Catalog Number 26-3511 – $24.95.

Personal Finance. A real timesaver that helps you manage the financial details of your household. Programs include Budget Management, which provides up to 15 expense categories; Electronic Checkbook, for recording checks and deposits and balancing your checkbook; Interest/Annuities, for compound interest/annuities calculations. A stock portfolio program tracks the value of your investments, and Metric/English Converter for easy and exact conversions between the two measurement systems. Catalog Number 26-3518 – $19.95.

Games Pack I. Fast-paced fun you can enjoy just about anywhere! IncludesCannibals and Missionaries, NIM for two players, Space Ship Landing, Teasure Hunt, Biorythm Computer, Star Buster, Quick Watson! and Craps. Catalog Number 26-3515 – $14.95.

Math Drill. Designed for children in the primary grades. Teaches basic math skills through examples and repetition. The package provides random problems at four levels of difficulty, a math table display and test, a program that allows the parent or teacher to enter problems. For fun, there’s a Hi/Lo game that allows a child to guess a random number selected by the computer. Catalog Number 26-3514 – $14.95.

PC-1 Stats

Catalog Number 26-3501
Year July, 1980
Introductory Price $249.95
CPU SC43177 and SC43178 (4-Bit Each)
One for arithmetic operation, one for BASIC interpreter and key-in
ROM 11K bytes total (7K for BASIC interpreter. 4K for monitor)
RAM 1.9K bytes total with automatic BASIC abbreviation for maximum memory conservation.
Program Capacity 1424 Steps, 26 memories with memory safe guard.
Video Size 24 Characters
LCD 24-character 7×5 dot matrix plus 8 symbols (SHIFT. DEG. RAD. GRAD. DEF. RUN. PRO. RESERVE)
Automatic scrolling plus manual playback of line longer than 24 characters.
Graphics None
Keyboard Keyboard 57 keys alphanumeric
Subroutines and FOR-NEXT Stacks 4 levels each. up to 15 levels of parentheses
Power Four type 675 mercury batteries.
Nominal battery life 300 hours.
What was it really? Sharp PC-1211

Plotter/Printer Stats

Introductory Price: $49.00
Printer: 5×7 Dot-Matrix Impact Printing
Printing Capacity: 16 Columns Per Line with Automatic Wraparound
Print (and Paper Advance) Speed: Approximately One Line Per Second
Paper: Radio Shack Catalog No. 26-3506. 125/32″ Wide. 31/32″ Diameter (Maximum)
Power Source: Built-In Rechargeable NI-Cad Battery. Battery Capacity: Approx. 8,000 Printed Lines
Charging Time: Approximately 15 Hours
Power Consumption: 4.8V, 1.84W (DC) Charger/Adapter Included
Weight: 0.90 Pounds
Accessories: 3 Rolls of Paper. Ribbon Cartridge. Cassette Connection Cable


Product Name Catalog Number Price Description Picture
Cassette Interface 26-3503 $29.95 With this handy, compact interface and a cassette recorder, you can run our business, engineering, math and games software or store your own important programs and data. Requires 3 “AA” batteries. 7/8 x 8-1/4 x 3-1/2.
Extra Printer Paper 26-3506 $1.75 For PC-1 Printer/Cassette Interface. 1-3/4″ wide. Package of 6.
Replacement Printer Ribbon 26-3507 $2.75 Always keep an extra ribbon handy. Installs easily.
Pocket Computer Carrying Case 26-3508 $14.95 Holds extra paper, ribbon and referenc card, too. Padded vinyl.
Personal Finance 26-3518 $19.95 Helps manage your houdehold finances. Includes budget, checkbook, interest/annuities, metric converter.
Business Finance 26-3517 $19.95 Loans, annuities, bond price, yield, compound interest, depreciation, days and dates, rate of return, much more.
Business Statistics 26-3516 $19.95 Ideal for marketing and sales decisions, forecasting, more.
Statistical Analysis 26-3522 $24.95 Includes correlation and regression, ANOVA, Chi-square, distributions (normal, t, F, X-squared), and multiple linear regression.
Real Estate 26-3510 $24.95 For investor and agent. Includes annuities, compound interest, more.
Civil Engineering 26-3511 $24.95 Variable “on-site” helper. beam computations, stress, vectors, more.
Surveying 26-3512 $29.95 Convert field measure to property boundaries. leveling, volume, more.
Aviation 26-3513 $24.95 Complete flight management system. Calculates altitude, airspeed, headings, more.
Electrical Engineering I 26-3520 $24.95 Low and high pass/active and passive filter design, complex impedance calculator, LF transistor, more.
Engineering Math I 26-3525 $14.95 Gaussian square matrix reduction (3×3 to 10×10) with display of reduced matrix and calculation of its determinant. Multiplication of I x J by J x K matrices yielding I x K (IJ+JK must be equal to or less than 108). Calculation of inverse square matrix (3×3 to 6×6).
Engineering Math II 26-3526 $14.95 Vector operations in 3 dimensions in both Cartesian and polar coordinates: addition, subtraction, dot product, cross product, angle between two vectors, direct conversion between rectangular and polar coordinates with easy mode change. Arithmetic operations with complex numbers, including calculation of magnitude, conjugation, base-e logs, e to complex powers, sines, cosines, arc sines and arc cosines, plus 24 trig functions, logarithms to any base and exponentiation of negative numbers.
Engineering Math III 26-3527 $10.95 Solves systems of up to 9 linear simultaneous equations for all unknowns. Gaussian matrix reduction (2×2 to 9×9). Common polynomial functions and calculus solutions for polynomials to the ninth order. Evaluation of polynomial at any point, calculation of an exact derivative at any point, calculation of an exact integral between any two points, Newtonian root search.
Engineering Math IV 26-3528 $7.95 Solves for the three common unknown triangles (side-side-side, side-angle-side, angle-side-angle) and from three Cartesian coordinates. Solves for all sides and angles in any angular unit (degrees, radians, or grads). Calculates area. Tests for equilateral, right, isosceles, obtuse and scalene properties.
Math Drill 26-3514 $14.95 For children in primary grades. Four levels of difficulty.
Games I 26-3515 $14.95 NIM for two, Space Ship Landing, Treasure Hunt, Craps, more.
Games II 26-3523 $14.95 More fun! Missile, Blackjack, Baccarat, Acey Ducey, Numguess, more.
Calendars 26-3529 $19.95 Programs to solve date-related problems. Day of week, days between dates, calendar printout, Julian date, more.
Horse Race Analyst 26-3530 $19.95 Helps predict winner based on past performance.
Banners 26-3531 $9.95 Lets you create eye-catching messages and signs. Prints upper and lower case, numerals, symbols. Requires Printer/Cassette Interface.
Golf Scoring 26-3532 $14.95 Helps an amateur monitor play and compute USGA handicap.

TRS-80 Pocket Computer – PC-2



Radio Shack Product Description (RSC-7)

           The term “personal computer” now takes on a new meaning! here is a system that’s so compact you can take it anywhere, yet it’s as powerful as as many full-size microcomputers! It’s ideal for engineers, students, businessmen … anyone with problems to solve on-the-go.

What Extended BASIC Means to You

This exceptionally powerdul programming language has 42 different statements, with 34 built-in functions. It permits two-dimension arrays for both numeric and character data. It can process character strings of variable length to a maximum size of 80 characters.

Its Speed Will Suprise You

The Model PC-2 has a microprocessor that’s as fast as many desktop computers.

It’s Expandable!

A recessed port on the back of the PC-2 accepts plug-in memory modules for up to 16K of RAM, ROM or ROM/RAM combination. Radio Shack will also introduce an RS-232C interface and software to allow the PC-2 to function as a terminal.

Deluxe Features

The Liquid Crystal Display (LCD) can be programmed to produce any submol within a matrix of seven dots high by 156 dots long. A built-in quartz clock is accessible from BASIC or the keyboard and provides month, day, hour, minute, and second. The 65-key keyboard features a typewriter-like layout and 10-key numeric pad. 18 programmable key functions and 18 user-definable label keys allow incredible flexibility. There’s even a programmable beeper.

RAM Modules

4K RAM Module more than triples the amount of memory in your PC-2. Just plug it into the back. Individual memory modules are non-expandable. 4K Module (26-3615) = $69.96; 8K Module (26-3616) = $139.95.

PC-2 Printer/Cassette Interface

The perfect companion for your Pocket Computer Model PC-2. Get four-color graphics and alphanumeric printouts and control two cassette recorders The PC-2 Printer/Plotter adds twenty-five commands and statements to Pocket Computer BASIC, including special statements that make plotting easy. Print 256 x 4096 graphics with easily replaceable ball point pens in green, red, blue, and black.

Dual-casette control allows reading, updating and writing of data under program control, without the need to change tape cassettes. Makes automatic data logging and program overlays easy.

The PC-2 Printer/Interface is ready to use when you slide in your Pocket Computer Model PC-2. There’s a built-in 60-pin I/O connector for use while your PC-2 is connected. Uses inexpensive 2-1/4″ cash-register type paper, and includes a U.L. listed AC adapter/charger that also powers the PC-2.

PC-2 Advertisements


PC-2 Stats

Catalog Number: 26-3601
Year: 1982
Introductory Price: $279.95
CPU: LH5801 (8 Bit Processor) @ 1.3Mhz
ROM: 16K bytes of system ROM
RAM: 1850 bytes BASIC program and data RAM
600 bytes of fixed data memory
190 bytes reserve memory.
Keyboard: 65 Keys including 6 programmable function keys for each of 3 Reserve modes
18 “softkeys”
10 pre-programmed command keys.
Video Size: 26-character alphanumeric Liquid Crystal Display (LCD)
Automatic scrolling
Manual playback of lines longer than 26 characters.
Graphics: 7×5 dot matrix ASCII upper and lower case character set.
Graphics fully-addressable 7×156 dot matrix LCD graphics permits generation of special characters.
Expansion: Single plug-in slot accepts up to 16K of RAM or ROM or ROM/RAM combination
String Handling: LEFT$. MID$. RIGHT$. LEN. VAL. CHR$ and STR$
Strings dimensionable to 80 characters in 2-dimension arrays.
Clock: Real-time, quartz-controlled.
I/O: All address and data lines. power, timing. and control signals accessible via 60-pin connector
Power Requirements: 4 “AA” batteries or AC adaptery.
Battery Life: Approx. 75 hours with “AA” Alkaline batteries.
What was it really?: Sharp PC-1500

Plotter/Printer Stats

Catalog Number: 26-3605
Introductory Price: $239.95
Alphanumeric Printing: Upper and lower case characters in four colors.
Height and width of characters depend upon the number of characters per line.
Nine different column widths (from 4 to 36 characters per line) with automatic wraparound.
Print Speed: Average 11 characters per second.
Graphics/Plotter Printing: 256×4096 color graphics. Controlled by BASIC statements and exploiting full 3-dimension axes.
Colors: Black, Red, Green, and Blue.
Paper: 2-1/4″ wide.
Power Source: Built-in rechargeable nickel cadmium battery also will power computer.
AC Adapter/Charger, included, also powers computer.
Battery Capacity: Approx. 1100 printed lines. Charging time approx. 15 hours.
Physical: Weighs 28 oz. with batteries and measures 2 1/16 x 12 15/16 x 4 1/2




Product Name Catalog Number Price Description Picture
Business Finance 26-3703 $19.95 Loans, annuities, bond prices, compound interest, yield, depreciation, days and dates, and more.
Invasion Force 26-3705 $9.95 Explore unknown planets. Destroy enemy aliens before they destroy you. (4K RAM module required)
Math Pak I 26-3709 $14.95 Advanced math functions, polynomial math, calculus, 3-D vectors, complex numbers, triangles
Math Pak II 26-3710 $14.95 Gaussian reductions, matrix inversion and multiplication, simultaneous linear equations.
Math Plotter 26-3711 $10.95 Planar cartesian, planar polar, 3-D cartesion and cylindrical polar printing.
PC-2 Games Pack 26-3702 $14.95 Sound Off, Hangman, Battleship, Football, Moonlander, Blackjack, Twister, Tic-Tac-Toe, Scratchpad
Personal Finance 26-3700 $19.95 Budget management, electronic checkbook, interest and annuities, metric/English converter, and more.
Statistics 26-3704 $29.95  
Pocket Organizer 26-3706 $19.95  
Flight Planning 26-3707 $24.95  
Chemistry Math 26-3708 $14.95  
Investment Analysis 26-3712 $49.95  

Other Options

Product Name Catalog Number Price Description Picture
Padded Vinyl Carrying Case 26-3608 $29.95 Holds Printer (with PC-2 installed) and AC adapter/charger. Keeps pens, paper, etc. organized
PC-2 Replacement Ballpoint Mini-Pens 26-1480 $2.95 Three Black
PC-2 Replacement Ballpoint Mini-Pens 26-1481 $2.95 One each: red, blue, green.
PC-2 Printer Paper 26-3606 $2.49 Cash register-type paper for PC-2 plotter/printer. 2-1/4″ wide. 6 Rolls.
RS-232C Interface 26-3612 $199.49 Now your PC-2 Pocket Computer can use most RS-232 devices with our new RS-232C Interface! It’s programmable from 50 to 2400 baud, and plugs directly into the PC-2 or Printer/Plotter/Interface. New commands added to the PC-2 BASIC make program control easy, and a built-in communications program lets you access services like Dow Jones News/Retrieval and CompusServe (requires modem and cable). Includes built-in rechargeable batteries and U.L. listed adapter/charger. 2 x 3-38 x 4-1/2″
4K Memory Module 26-3615 $69.95 Just plug this memory module into the recessed port on the back of your PC-2 for 4K of additional RAM. Individual modules are not expandable.
8K Memory Module 26-3616 $139.95 Just plug this memory module into the recessed port on the back of your PC-2 for 8K of additional RAM. Individual modules are not expandable.
Getting Started on the PC-2 26-3620 $12.95 This easy-to-read tutorial manual covers commands and programming tips for the PC-2 and the Plotter/Printer/Interface.


Emmanuel Beaurepaire’s PC-2 page

TRS-80 Pocket Computer – PC-3/3A



Radio Shack Product Description

           A computer so small it fits in pocket or purse! Program PC-3 to solve tough problems, or use our ready-to-run software (requires interface and recorder). Use strings of up to seven characters. Features 24-character LCD, two-digit exponents, multiple statements, arrays, edit and trace. Statement compation squeezes memory space. Automatic power-off saves battery life. Comes with batteries and manual.

PC-3/PC-3A Stats

Year: 1983
Introdutory Price: $99.95
CPU: SC 61860
ROM: 24K
PC-3 RAM: 1.4K
Functions: 16 Arithmetic and 8 String Functions
Accuracy: 10-Digit
Video Size: 24 Characters
Graphics: None
Measurements: 3/8 x 5-5/16 x 2-3/4″
What was it really?: Sharp PC-1251


Product Name Catalog Number Price Description Picture
Printer/Cassette Interface 26-3591 $119.95 Get the most from your PC-3 with our new thermal dot printer and cassette interface! Provides hard copy, plus lets you save programs on ordinary cassette tapes (requires recorder). Prints 24 characters per line at one line per second, with wrap-around. Slip PC-3 into the Printer/Cassette Interface and you’re ready to go! Includes U.L. listed AC adapter/charger, paper, cable, and manual.
PC-3 Thermal Paper 26-3592 $2.49 2-1/4″ wide. Package of 5.
Personal Finance 26-3518 $19.95  
Business Finance 26-3517 $19.95  
Business Statistics 26-3516 $19.95 Ideal for marketing and sales decisions, forecasting, more.
Statistical Analysis 26-3522 $24.95 Includes correlation and regression, ANOVA, Chi-square, distributions (norma, t, F, X2) and multiple linear regression.
Real Estate Analysis 26-3510 $24.95  
Civil Engineering 26-3511 $24.95  
Surveying 26-3512 $29.95  
Aviation 26-3513 $24.95  
Electrical Engineering I 26-3520 $24.95
Engineering Math I 26-3525 $14.95 Performa Gaussian matrix reduction, matrix multiplication, and inversion.
Engineering Math II 26-3526 $14.95 Performs common 3-D vector operations, complex numbers, more.
Engineering Math III 26-3527 $10.95 Solves simultaneous equations, polynomials, simple calculus.
Engineering Math IV 26-3528 $ 7.95 Solves variety of triangle problems.
Math Drill 26-3514 $14.95  
Games I 26-3515 $14.95  
Games II 26-3523 $14.95 Missile, Blackjack, Baccarat, Acey Ducey, Numguess, more.
Calendars 26-3529 $19.95 Programs to solve date-related problems
Horse Race 26-3530 $  
Banners 26-3531 $9.95 Create big, eye-catching messages and signs. Requires Printer/Cassette Interface.
Golf Scoring 26-3532 $14.95  

TRS-80 Pocket Computer – PC-4



Radio Shack Product Description (RSC-9)

           Our lowest-priced pocket computer ever! The new PC-4 lets you maintain up to ten short programs in memory or combine the prorgamming area to allow longer programs. Each program can be identified with a single-key label and run simply by pressing the specified key. PC-4’s BASIC language includes 23 commands, 15 functions and 10-digit numeric accuracy. Up to 16 commonly-used commands like GOSUB, LIST and STEP can be entered by pressing just two keys. Programs can accept words and names as data (strings of up to 30 characters). Edit and Debug modes make the PC-4 much easier to program than a programmable calculator. The keyboard-with a typewriter-style layout-includes 53 keys for alphabetic input, plus a 10-key numeric datapad. The big l2-character LCD has easy-to-read characters, plus 15 smaller mode indicators. It can handle numbers with exponents of 10 to the 99th power to 10 to the -99th power. Functions include trig and inverse trig, radians or gradians, log, exponent, square root, angular conversions and absolute values. Auto power-off saves battery life. Requires two lithium batteries.

PC-4 Stats

Catalog Number: 26-3650
Year: 1983
Price: $69.95
ROM: 10K
RAM: 1.9K (544 Program Steps; 1,568 with optional 1K RAM module)
Video Size: 12 Character alphanumeric LCD. Lines up to 62 characters.
Keyboard: 53 triple-mode upper/lower case alphabetic keys, 10-key numeric pad
Character Style: 7 x 5 dot matric ASCII.
Graphics: NONE
String Handling: LEN, MID, VAL with strings up to 30 characters in length
Power: 2 Lithium Batteries
Measurements: 3/8 x 6-1/2 x 2-3/4″
What was it really?: Casio PB-100


Product Name Catalog Number Price Description
Cassette Interface 26-3651 $39.95 Allows you to store and load programs at 300 baud using an optional cassette recorder. Plugs into rear of PC-4. Weighs only 8-1/2 oz, including batteries. Requires two “AA” alkaline batteries.
PC-4 Printer 26-3652 $79.95 Operates under control of PC-4 to print out programs and data. Use as a printing calculator, too. Prints 20 characters per line (60 lpm) in an electro-thermal 5 x 7 dot matrix. Includes rechargeable nickel-cadmium batteries and U.L. listed adapter/charger.
PC-4 Thermal Paper 26-711 $2.19 Package of 5.
1KB RAM Memory Module 26-3653 $19.95 Triples the memory of your PC-4. Gives 1024 steps of additional program and data power. Inserts within PC-4. Only one module may be used.
Carrying Case 26-3654 $7.95 Custom padded vinyl carry case protects your PC-4 Printer and Cassette Interface while you travel or work in the field. Zippered opening. Internal pocket for AC adapter/charger.
PC-4 Programming Guide XXX XXX XXX

TRS-80 Pocket Computer – PC-5



Radio Shack Product Description (RSC-15)

           An ideal tool for engineers and students, the PC-5 combines the best features of a powerful scientific calculator and a pocket computer. Performs up to 75 built-in scientific calculations – or write your own programs in BASIC or assembly language. Retains programs and data even when power is off. A built-in Note and Address File keeps important telephone number or engineering data and formulas handy. Features an easy-to-read, 24-character LCD. Uses PC-4 Cassette Interface and Printer with PC-5 Cable (all sold separately). 4K RAM. Includes battery.

PC-5 Stats

Catalog Number: 26-3670
Year: 11/30/1985
Price: $119.95
CPU: Z80
Functions: 75 Built-In Scientific Functions
Video Size: 24 Characters
Graphics: NONE
Languages: BASIC and Assembly Language
Physical Size: Folds Up to 3/8 x 5-5/8 x 5-5/8″
What was it really?: Casio FX-780P


PC-5 Cable 26-3671 $14.95 For use with PC-4 Cassette Interfaec and PC-4 Printer.

TRS-80 Pocket Computer – PC-6



Radio Shack Product Description (RSC-17)

           An ideal tool for engineers and students, the PC-6 combines the best features of a powerful scientific calculator and a pocket computer. Performs up to 65 built-in scientific calculations – or write your own programs in BASIC or assembly language. Retains programs and data even when power is off. A built-in Note and Address File keeps important telephone number or engineering data and formulas handy. Features an easy-to-read, 24-character LCD. Uses PC-4 Cassette Interface and Printer with PC-5/6 Cable (all sold separately). 8K RAM. Folds up to only 3/4 x 1-13/16 x 5-5/8″. Includes battery.

PC-6 Stats

Catalog Number: 26-3672
Year: 1987
Price: $119.95
CPU: HD61747B20 and HD61747B25
ROM: ???K
RAM: 8K (Expandable to 16K)
Functions: 65 Built-In Scientific Functions
Languages: BASIC and Assembly Language
Video Size: 24 Characters
Graphics: NONE
Measurements: Folds to 3-4 x 1-13/16 x 5-5/8″
What was it really?: Casio FX-790


Product Name Catalog Number Price Description
Travel Case 26-3608 $19.95
PC-4/5/6 Cassette Interface 26-3651 $39.95
PC-4/5/6 Printer 26-3652 $79.95
PC-5/6 Cable 26-3671 $14.95
8K RAM Module 26-3674 $19.95 For 16K total memory.
Thermal Printer Paper 65-711 $1.99 1-1/2 x 8-1/2. Package of 5.
Replacement Lithium Battery 23-162 $1.79

TRS-80 Pocket Computer – PC-7



Radio Shack Product Description (RSC-17)

           Keep track of important data and calculations wherever you go with our new PC-7 Pocket Computer. This incredible, compact unit performs up to 72 scientific calculations and 17 statistical calculations. This makes it perfect for engineers, students and professionals who need exact mathematical data rapidly. Mathematical functions include trigonometric, logarithmic/exponential, absolute value, permutations, standard deviation, linear regression and many others. The PC-7 features 2K random access memory and 35 commands in BASIC including: CLEAR, END, INPUT, DATA, READ AND STAT. You can even write your own programs in BASIC! Keyboard composed of 72 keys. Measures 13/32 x 5-1/2 x 7-3/32″.

PC-7 Stats

Catalog Number: 26-3673
Year: 1987
Introductory Price: $69.95
CPU: ????????
ROM: ????????
Video Size: 12 Characters
Graphics: NONE
Languages: BASIC
Measurements: 13/32 x 5-1/2 x 7-3/32″
What was it really?: Casio FX-5200P


Product Name Catalog Number Price Description
Replacement Lithium Battery 23-162 $1.79  

TRS-80 Pocket Computer – PC-8



Radio Shack Product Description (RSC-19)

           Ideal for business people. Do compound interest, installment loans and more. Lets you store frequently used programs in memory. BASIC language includes 24 commands, 27 functions and 10-digit numeric accuracy. Typewriter-style keyboard includes 53 alphabetic keys and a 10-key numeric datapad. A big 16-character LCD scrolls to 80 characters. With batteries and manual.

PC-8 Stats

Catalog Number: 26-3655
Year: 1982
Price: $59.95
CPU: SC61720D03 (4 Bit)
ROM: 16K
RAM: 1.2K
Video Size: 16 Characters
Graphics: ????????
Measurements: 3/8 x 5-5/16 x 2-3/4″
What was it really?: Sharp PC-1246


Product Name Catalog Number Price Description
Printer/Cassette Interface 26-3591 $119.95 Store and load programs on cassette tapes using an optional cassette recorder. Prints at 24 characters per line (48 Ipm) in an electro-thermal 5 x 7 dot matrix. Includes rechargeable batteries and U.L. listed AC adapter/charger, paper, cable and manual.
Thermal Printer Paper 26-3592 $2.49 Package of 5.
Travel Case 26-3608 $19.95