I want to build a complete Z80 computer on a credit card sized PCB
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22-01-2021
Finally had some time to put all the parts on the map. Now comes the big work, programming and testing. First the memory mapper in the CPLD then the ATmega and then the Z80
08-05-2021
Build uploaded 2 files for the CPLD one is just a memory mapper and the second is the configuration for if you want to build a MSX computer with 512K Ram. its all tested and working fine. Now working on the software for the ATMega
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did you read the comments???????????????????????????
"Z84C1510. This chip has a Z80, a PIO, a SIO and a CTC on board and can handle 20MHz."
Wow! All in One. Good luck!
bert.hoogenboom
Dylan Brophy
Scott
mel
Nick Brok
Have you considered adding a FDC37C I/O Controller...?
It has lots of stuff on one chip.
FDC...compatible with upd765
RTC Clock Calendar
Timers
Parallel I/O
Serial I/O 16c552
PATA IDE interface
And other stuff !!