The CC-40


Size: 9.5"x5.75"x1"
Weight: 22 oz.
CPU: TMS70C20 CMOS 8 Bit
Speed: 2.5 MHz
ROM: 34K
RAM: 6-18K
Display: 31 character 5-by-8 dot matrix Liquid Crystal Display
Power Supply: Four AA batteries or AC Adapter
Manufactured: 1983


This is the Texas Instruments Compact Computer 40, or CC40. The keyboard is composed of 'chicklet' style keys. In addition to a traditional QWERTY-style keyboard, there is a numeric keypad to the right. Four special keys are located above the keypad: BREAK, RUN, ON, OFF. A recessed reset button is located to the right of the space bar.

The screen is a LCD and is one line by 31 characters long. Display contrast is adjusted by a dial which is located on the left side of the machine. Special characters are also located on the display: SHFT, CTL, FN, DEG, RAD, GRAD, I/O, UCL, ERROR, a low battery indicator, left and right arrows to indicate that text had scrolled off the screen, and six arrow-shaped indicators that can be turned off and on by the user through the use of the 'CALL INDIC' command. Although fairly simple as graphics, custom characters can be defined. Using the 'CALL CHAR' command, the dots in 5-by-8 grids can be specified as being 'on' or 'off'.


A cartridge port is located on the upper right corner of the machine. Memory could be expanded by installing a cartridge or 'preprogrammed Solid State Software' cartridges could be used. Titles released by Texas Instruments included: Memo Processor, Mathmatics, Games #1, Finance, and Electrical Engineering. Back of CC40

This is the back of my CC40. As you can see, it operates on two 'AA' batteries or an optional AC power adapter. The power adapter (TI model 9201) is plugged into a jack in the rear left corner of the machine. The CC40 has an automatic power down feature which will be activated after approximately ten minutes of no input. Even when turned off, the 'constant memory' feature will retain programs stored in memory.

The CC40 is composed of two double-sided circuit boards connected
to one another by two ribbon cables (yellow- shown below).

Front circuit board

This is the 'top' circuit board. A rubber pad sits between each of the keys and the coresponding contacts on the circuit board. The pad creates the 'spring back' response of the keys as well as serves to make contact between the lines on the board.
Top circuit board

This is the 'bottom' circuit board. The IC's (left to right by column) are as follows:


(As near as I can tell.)

Photos From The CC40 Box: Printer

Caption Reads:
"Printer/Plotter prints standard characters and full graphics in four colors."
Powered by batteries.


Caption: "Wafertape [tm] digital tape drive- fast and reliable mass storage."
On my box, a sticker below that caption states: "Wafertape digital tape drive is not available." Reportedly, the wafertape drive was not reliable and it was therefore never put into production. No other form of mass storage device was ever made for the CC40- a major pitfall.


A CC-40 system. Stacked on the right (top to bottom): Printer/Plotter, Wafertape Digital Tape Drive, RS232/Parallel Interface.

Regarding the RS232, the box reads: "An RS232/Parallel Interface- To Talk With The World. An RS232/Parallel interface allows you to connect the CC-40 with most 80-column printers and X-Y plotters. By adding a telephone coupler (modem), you can communicate with computers and information nets across the world."

Learn CC40 Basic Book

The CC40 comes with a resident 'Enhanced Basic' which is very similar to that ot the TI-99/4A. PEEK and POKE commands were supported in order to read and write to memory locations.

I purchased this book off the internet. It's titled Learn Basic: A Guide to Programming The Texas Instruments Compact Computer 40 by David Thomas and Texas Instruments. The back cover states that Mr. Thomas was a writing consultant to TI. According to the 1983 copyright, the book was published by McGraw-Hill and Texas Instruments.

Composed of 28 'lessons' it apparently assumes no previous knowledge of BASIC programming and begins with variables and moves through to string manipulations and logical operations.

- Download this book from the file database: Guide To Programming The CC40

      CC40 User Guide Cover

The CC40 was shipped with a user's guide that lists the lists the CC40 specs, and explains how to program it.

- Download this book from the file database: CC40 User's Guide

This file has been in the database since 2006, but on 7/10/15, I uploaded a 'cleaned up' version.

Want to get your own CC40?

Own a CC40!  Mike Dudeck sells CC40 computers and equipment, and has sent me a new price list.  You can take a look at his inventory by visiting or you can contact Mike at [email protected]

CC40 Articles By Charles Good

CC40 Article
The TI-74 "BASICALC": A Modern 8K Pocket Sized Reincarnation Of The CC40 And 99/4A"

Excerpts from the book
Using & Programming The TI-99/4A by Frederick Holtz

David Vohs found information on The Museum of Dead, Gone and Obsolete Computers web site which states that the Excelvision EXL 100 was created by people who had worked at Texas Instruments. Apparently, the EXL 100 was only available in Europe and used the same CPU and BASIC as the CC40. Check the CC40 and EXL sections on the Museum's web site for more complete information.

CC40 Programs by Walid Maalouli

You can type these Basic programs into your CC40:


CC40 Files In The 99er File Database
Purchase A CC40 From Tex*In Treasures

The Pocket Computer Museum
High Tech Solutions

Something to contribute? Questions? Comments? Corrections? E-mail me at [email protected]

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