25 Dec
2010
25 Dec
'10
6:23 a.m.
On Fri, 24 Dec 2010, Jim Brain wrote:
* I so want to start learning Verilog. I thought,
if I got a
basic environment going, I could then take a look at virtualizing
the pieces to an FPGA connected to the C128/C64. But, since I
know little of Z80 and CP/M (having used it long ago), I thought
going to FPGAs from nothing was too large a leap.
Learning is always a valid motivation for a project.
* The next step after that is an accelerated CP/M.
This plays in
with my hope to obtain the rights to the SuperCPU for the
C64/C128. It lacked accelerated Z80/CP/M compatibility, which I
thought I could add, though maybe not.
Now you're talking! I suspect you'd have considerably more commercial
success with a reissue of the SuperCPU. If you use an actual WDC 65816
with verilog-based FPGA glue logic it should be a relatively
straightforward job. With a large enough FPGA, you might well be able to
synthesize both the 65816 and a Z80. I suspect the latter approach might
be cheaper in the long run.
Steve
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