During the classic era, just about every videogame hardware company either
promised a computer add-on or released one to market. For some reason, the
prevailing belief among the hardware giants was that a computer module added
credibility and helped to boost sales of the console as a result. As history
has shown us, this is far from being the case.
Atari planned to introduce a 7800 computer adapter shortly after the system's
release. It was to retail for a little over $100, and although it would not
run existing software for the Atari 8-bit computer, they 7800 keyboard was
supposed to be compatible with all peripherals designed for the 400/800/1200
As was the case with the Graduate (2600 computer add-on), the 7800 computer
adapter failed to make it to market. This isn't surprising given that
the 7800 was killed by the Tramiels shortly after they took over Atari
One interesting tidbit.... They prototype keyboard shown above hooks up
to the 7800 via the joystick port and not the expansion port at the back
of the unit as most people have theorized.