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BIT 90

This is an obscure and rare system, compatible with Colecovision cartridges, just like the Coleco Adam computer. Apparently, BIT Corporation was involved in the development of the Colecovision project. So this system is maybe not a outlaw project after all.

This computer had a completely rubber keyboard a bit like the ZX-Spectrum. Basic statements and graphic symbols could be accessed via combinations of "function" keys such as CTRL, BASIC, FCTN and a special symbol key.

The BIT-90 could display 16 colors and 32 sprites, with a high-resolution of 256 x 192 pixels.

Like its little brother the BIT-60, the BIT 90 could directly accept Colecovision cartridges, and Atari 2600 cartridges through a special interface.

The BIT-90 bears a striking resemblance with the Sega SC-3000 computer. It is not compatible, but share a lof things in common. The main common point is that they are both designed around the powerful Texas-Instruments Video Display Processor TMS-9929A which was revolutionnary for the time. A lot of systems used it, and that explains the common feeling when using them: Colecovision, Creativision, MSX computers, Sega SG-1000, Sega-SC3000, Tomy Tutor, Casio PV-1000/2000, etc.. not to forget the TI-99/4 which of course the first to use that VDP.

The BIT-90, like the BIT-60 seems to have been available in different colored models, at least one white and one grey.

Maybe due to legal problems, this computer didn't last long.

We need more info about this computer ! If you designed, used, or have more info about this system, please send us pictures or anything you might find useful.
Please consider donating your old computer / videogame system to or one of our partners from anywhere in the world (Europe, America, Asia, etc.).


I got this computer when I was 10 years. played a few games (had 5 or so). Does anyone know how I can find games for this computer. It still workes fine.

Wednesday 6th September 2017
Ray (Netherlands)

Coleco carts work but not all of them
also can not assign 2nd fire button to joystick for games
that use it so you have to use one button in keyboard and one in joystick

Friday 11th July 2014
Laios  (Greece)

I owned a Bit-90 when I was child and I always remember that everytime started to program, after a few lines it showed "Out of memory". Now I understand why, it has 1KB of RAM!! Great memories of 80''.

Sunday 19th May 2013
Fernando L


MANUFACTURER  Bit Corporation
TYPE  Home Computer
YEAR  1983
KEYBOARD  Rubber keyboard, 66 keys with Basic statements and graphic symbols
ESC, CAPS LOWER, SHIFT (x2), CTRL, BASIC, FCTN, RETURN, BS (backspace), DEL, INS, RETURN, RST (Reset), arrow keys, symbol key
CPU  Zilog Z80A
SPEED  3.85 MHz
CO-PROCESSOR  Texas Instruments TMS-9929A (Video Generator)
RAM  2 KB RAM (TMM2016AP) (up to 64 Kb), 1Kb left for programming
VRAM  16 KB VRAM (AM9016 x 8)
ROM  24 kb
TEXT MODES  32 x 24 with 16 colors
GRAPHIC MODES  64 x 48 (semi-graphic mode), 256 x 192
SOUND  Texas Instruments SN76489AN soundchip, 3 voices, 5 octaves
SIZE / WEIGHT  330mm width x 214mm depth x 50mm heigth
I/O PORTS  Cardridge slot, Cassette interface (2400 bauds), RGB video output, RF TV output, Audio output, 2 x Joystick port (DB9), Expansion Bus
PERIPHERALS  Memory expansion, printer, disk drive, modem, RS232c interface
PRICE  Unknown

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