CompuMate

The CompuMate SV010 was a home computer peripheral manufactured by Spectravideo International for the Atari 2600 home video game console. It was released on 6 January 1983 at the Winter Consumer Electronics Show in Las Vegas, Nevada.
In Germany, the CompuMate was marketed by Quelle, a catalogue company, as the Universum Heimcomputer. In Brazil (circa 1985), at least two clones of CompuMate were made: the Dactar-Comp by Milmar Electronics, and the CompuGame.
Hardware.
The ComputeMate consists of a membrane keyboard, output interfaces, and read-only internal storage. It connects to the console's module slot and to both controller ports. The user could optionally place the ComputeMate on top of the console—although not when used with the Atari 2600 Jr. model.
The CompuMate has a 3.5-mm phone connector in order to connect a Compact Cassette unit for non-volatile data storage. Its read-only memory is preinstalled with three computer programs.
PAL and NTSC versions of the CompuMate were manufactured.
Software.
The CompuMate has three simple computer programs in its internal read-only memory:
Spectravideo only published two programs for the CompuMate on Compact Cassette, PictureMate (1983) and SongMate (1983).