Z80 CPU Tester (Fail)

Recently I was watching Lee from More Fun Making|Fixing It with an “unpacking” video that contained a pile of Z80 CPUs ordered from a large Chinese supplier, and he was testing them using a neat Z80 CPU tester to work out if they were CMOS or NMOS devices and what frequency they would support. I… Continue reading Z80 CPU Tester (Fail)