PS/2 keyboard to matrix converter for the Aster CT-80 computer

From the original developer -

A recently aquired vintage computer came without the keyboard. As this is a simple 8x8 matrix, and the PS/2 keyboard protocol is supported by the Arduino environment, is should be simple to fix. This solution uses a Arduino Nano to interpret the PS/2 keyboard and convert it to an address for the MT8816 Analog Switch Array having a 16x8 matrix. The required matrix is only 8x8, so a smaller array might also work, but the MT8816 was easier to obtain.

The hardware side of the Aster keyboard is very similar to the Tandy Radio Shack models 3 and 4, so board and firmware could be used for these computers too, with minimal changes. More info on this after I tested this on my Model 4P.

(This was reproduced from the authors Github and has no assigned license)