Hi
> There are several I/O controller chips for PC. I consider to use
>PC87309 of National Semiconductor. It includes keyboard/mouse
>controller, floppy disk controller, parallel and serial ports.
>
How about hardware compatibility. PC87.. have own i/o adress space.
KBD is it problem too. RS232 must +-12V. ( I like more RS422 )
Valery
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