> > For the interfacing part Im thinking to use a PIC with 4 (4x4 bit > > dual acces RAM to make it emulate the matrix). > Like 74LS670? 4*4*4 is 64 while SAM have 69 keys. > > What do you want to do with Spectrum programs that test keyboard > with 0 in high byte? Hi byte is 0 mostly for a PRESS 'ANY KEY' test. I would map row SPACE SS M N B as the first row to scan. So one of these keys can be pressed in a ANY KEY situation.
Edwin Blink.
