Quote:
Originally Posted by cmjones01
By the way, when I mentioned starting with an 8255, I meant a *model* of the 8255 in VHDL or Verilog as a starting point for developing a Z80-PIO model which would be compatible enough with the existing software
|
Appeals to me too, but although I have been putting together microprocessors and microcontrollers since the late seventies I have absolutely no experience with or tools for using programmable logic (sorry if that's not what you are talking about - I'm assuming it is) - it would probably be a pretty hefty (and expensive) learning curve for me now.
I have a lot of admiration for what people seem to be able to do with them though - there's a guy who has built a modern version of Sinclair's original home computer (the MK14) and most of it seems to be a large programmable device used to replace most/all of the original separate logic.
Still, the best solution for me seems to be replication of the original Spectrum AMX mouse interface.