The Bit 90 is a rare 8-bit home computer manufactured by Bit Corporation of Taiwan, released in 1983–1984. It is essentially a ColecoVision with a full keyboard and BASIC programming language — making it both a home computer and a ColecoVision game console in one unit.
The Bit 90 features a ColecoVision-compatible cartridge slot that accepts standard ColecoVision game cartridges directly. It shares the same core hardware: the Zilog Z80 CPU, a Texas Instruments TMS9918-family VDP, and the SN76489 sound chip. The built-in Bit90 BASIC 3.1 turns it into a capable home computer with dedicated BASIC keys on the keyboard for quick command entry.
The computer bears a striking resemblance to the Sega SC-3000, which shares the same TMS VDP family. While not compatible with the SC-3000, both machines represent the same era of Z80/TMS9918-based home computing. Available in at least two color variants: white with black keys and silver/grey with green keys.
An optional Atari VCS/2600 cartridge adapter was also sold separately, mirroring the ColecoVision’s own Expansion Module #1 capability. Bit Corporation was reportedly involved in the development of the original ColecoVision project, which may explain the deep hardware compatibility.
