Homebuilt TTL and transistor CPUs - test-drb@ccmp.vtda.org

4 Jan 2006

...
 From: "Chuck Guzis" <cclist at
sydex.com>

On 1/4/2006 at 11:29 AM Dwight Elvey wrote:

  If it was some IP you bought or got from someone
else,
I don't think it would qualify. If you did the work your
self, then it is valid.
 Think in terms of:
  I build my PC by plugging these cards in.
 versus:
  I build my cpu using FPGA for my alu and instruction
  decoder. I used my own MISC instruction set. 
Okay, so where does "I put together the logic (or used an FPGA) but
implemented someone else's instruction set (e.g.  PDP-11, VAX, 6502, Z80,
etc.) fit in?

Cheers,
Chuck

Hi
 I'd consider that to be home built. Just as the EPROM alu
that he used on the 6502 was homebuilt.
 Still, it is much more fun to think about your own processor.
Dwight