Arduino, Hacking, SEM, Rom, Hacdc.
The Oddbloke Geek Blog. I’ve taken his approach and modified some of the code to work with the chips I’m using. The d27128 he refers to is a much larger ROM from the BBC micro. The ROMS in our SEM come in two varieties: 25L32 and 2516. The first thing to do is find the datasheets. As far as I can