Robert Morrison

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…and in with the…Old! I replaced the 1984 Z80 with one produced in 2018 but it caused some weird screen corruption. I swapped it for another from 1984 (produced the same week!) and it works perfectly. Meanwhile the 2018 Z80 is perfectly happy in my Harlequin; CMOS/NMOS issue??

ZX Spectrum circuit board with a very shiny heat-sink and a Z80A CPU with the date code of 8425same as the other image but two more Z80 chips are in shot. the second chip also has date code 8425 and the third reads (partly obscured) 1839