17 Jan
2008
17 Jan
'08
12:33 a.m.
Good luck.. The 9915 keyboard interface is for a
matrix-of-switches dumb
keyboard. I don't know how fast it scans, a microcontorller might be able
to keep up. The main prolem is that it's not at TTL levels (I think it's
at 6V CMOS levels).
Tony, as fast as it could be, just an interrupt onto the first (or in
all) of the columns/lines and you can scan the entire matrix in sync with a
microcontroller. Thats what I did in a MSX keyboard converter. And it can be
done - as far as I know - to any old microcomputer avaiable
It isn't just a matter of rewiring switches - but the praticity of using
any PS2 keyboard - and better - the best keyboards you can find. I hear
someone shouting "IBM MODEL M" from way behind :o)
Greetings from Brazil
Alexandre
In a "hardware hacker" day :oD