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Intelligent Systems Corporation (ISC) was started in 1973 byCharles A. Muench, to develop a color computer graphics terminal to compete with the mechanicalTeletype and monochrome "glass TTY" terminals commonly in use at this time.

Their first product, advertised inFebruary of 1976, if not earlier, was theIntecolor 8001 professional intelligent CRT terminal - a $1,395 kit to be assembled by the purchaser, featuring a huge 19-inch RCA delta-gun CRT. The system came with 4K of RAM memory as standard.

It wasn't untilDecember of 1976when theIntecolor 8001 color terminal could be expanded from a computer interface device into a complete stand-alone computer: For an additional $1,295 ($2,690 total), theIntecolor 8001 could be converted into theCompucolor 8001 - an expanded, stand-alone micro-computer with built-in BASIC programming language.


TheCompucolor 8001, which was referred to as theCompucolor I during developement, is often considered "the first desktop color graphic computer".

This webpage is more oriented towards thestand-alone computer aspect of the ISC 8001 system, not the earlierintelligent terminal history, so many of the prices and dates are relative to this fact.

TheCompucolor 8001 has up to three modes of operation:

CRT Mode

Compucolor BASIC

CPU Operating System (optional)

When first turned-on or RESET, The 8001 comes up inCRT Mode, for two-way communication with another computer system via the RS-232serial port. This is how most standard computer terminals of the day operated.
Pressing <ESC><W> on the keyboard switches the system intoCompucolor BASIC, which allows the user to write and run programs in the Compucolor BASIC programming language.
If "option 34" has been installed, pressing <ESC><P> on the keyboard switches the system intoCPU Operating System, which is similar to "Monitor" on othercomputer system. It enables the operator to manipulate the contents of the system memory, read and produce magnetic tapes, and execute programs.



ISC president Charles Muench stated that he himself analyzed the Microsoft BASIC programming languagedeveloped for the MITS Altair 8800 computer, and "reversed engineered it" for use in hisCompucolor 8001, but eventually "purchased the BASIC source code from Microsoft so that we would be legal".

TheBASIC 8001 programming guide is included in theCompcolor 8001 User Manual (10MB PDF document), as is other systems information and CRT alignment procedures.

The floppy-tape storage device is comprised of one or two external 8-track, continuous-loop tape drives, running at 4800 Baud rate (about 600 characters per second), storing up to 1024 KB of data per tape. One program is stored per track, or up to eight programs total per cartridge.

These8-track tape cartridges are identical, although with much less tape inside, to the consumer audiophile version commonly used to record and play music and other audio material in the 1970's.

Although novel, the external floppy-tape drive was short lived due to poor performance, with maybe 25 units sold, according to "Gene" from Intecolor.

In late 1977, ISC designed a floppy-disk controller utilizing the Western Digital FD1771 floppy-disk controller chip, which would support MD0:/MD1: (single-sided/single-density - SSSD) and DM0:/DM1: (double-sided/single-density - DSSD).

By 1978, 8-inch floppy-drives from Shugart and Seimens were supported as FD0:/FD1: (single-sided/single-density - SSSD) and DF0:/DF1: (double-sided/single-density - DSSD).

Even a little later a double-density floppy-disk controller was released to support XM0:/XM1: (5-1/4 inch) and XF0:/XF1: (8-inch).

A fourth mode of operational was added to the system to take advantage of the new floppy-drive capabilities.
Pressing <ESC><D> on the keyboard switches the system intoFCS - File Control System - which is similar to DOS, to allow the user to access and manipulate the external data storage devices, like the mini-disk drives, to load and save data and programs.




TheCompucolor 8001 keyboard, from Collimation, Inc., is very unique. It does not have any mechanical contact or switches to wear out or get dirty. The keys are all optically-encoded - they move coded masks which either pass on interrupt light beams emanatingfrom light emitting diodes (LEDs) at one end of the keyboard, and detected by an array of photo-diodes at the other end.

All of the digital computer circuitry is housed in a small 8-slot card-cage inside the main system. These cards have 100-contact edge connectors, but they are not S-100 compatible - they are Intecolor specific. There are pictures of the computer system cardsfurther down this page.

TheCompucolor 8001 was mostly a big and heavy (85 lbs) industrial product, and required an external data storage device to be really useful as a stand-alone computer. In 1978 Intecolor released theirCompucolor II - a cheaper all-in-one personal computer designed for the consumer market.

We have over a dozen floppy disk archives that you can download, convert, and run on yourCompucolor system. Download theZIP file (350KB) - make sure you read the readme.txt file for important information.

Related Links Detailed History Of ISC/Intecolor fromPeripheral Exchange ISC company profile fromClassic Tech ISC 8001 fromCarl Richard Friend old-computers.com February 1976 BYTE Magazine advertisement January 1977 73-Magazine advertisement

CPU card

4K/8K RAM memory card

24K ROM/PROM memory card

Display controller card

Mini-floppy disk controller card


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