Emulating old computers on FPGA

Philip Pemberton classiccmp at philpem.me.uk
Wed Jun 20 09:58:19 CDT 2007

Liam Proven wrote:
> Since I see this is coming up, I though folk might be interested in this:
> http://www.msx.org/One-Chip-MSX-MKII.newspost3805.html

I've got a single-chip version of the Atari Digital Vector Generator that I 
cooked up for fun last year. One of these days I'll reimplement the POKEY chip 
in Verilog (that should be fun <grin>) and build a Eurocard-sized Asteroids 
clone, complete with vector output circuitry.

But alas, the floppy drive reader comes first. Creating schematic symbols for 
208-pin QFP parts is painful at best. I really need to order a few of the 
smaller (144-pin IIRC) XC95288XL gate arrays from Digikey - because there is 
no way in hell I'm paying RS's 3x markup *and* extortionate postage on top of 
that. What's really annoying is that the CPLD is the one part that's stopping 
me building the prototype - the logic code is done, and a good bit of the 
firmware. Just I don't have a CPLD that fits :-/

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