Posted By
MMS
on 2013-07-30
19:14:57
 |  Re: Z80 GUI: SymbOS
Thanks for the lot of interesting and useful information!
BTW Z80s boards for C64 for CP/M DO exist for C64 (I ithink at least 4-5 brands available).
So, the problem highlighted seems to be not so complex, and the circuit diagrams does not look too complex. Available here:
http://www.baltissen.org/newhtm/c64_cpm.htm
http://www.z80.eu/c64.html
Fortunately the 6502 allows the complete shut-down of CPU (with or without NMI)
Upgrading this ready concept to a newer HW + Symb OS could be a very nice project.
So mapping the gfx seems done by the system previously too, though I read that only 1MHz Z80 CPU was used
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