Thanks for that. Looked around a bit, and found this discussion (https://retrocomputing.stackexchange.com/questions/5080/fastest-cp-m-z80-based-computer-ever-bu

Thanks for that. Looked around a bit, and found this discussion (https://retrocomputing.stackexchange.com/questions/5080/fastest-cp-m-z80-based-computer-ever-built https://retrocomputing.stackexchange.com/questions/5080/fast...) which reminded me of the EZ80 (top ~ 100Mhz) and the limitations of RAM. Oh well ... maybe 80MIPS will have to do ...