properly
again! I believe this is the first time I've run into a faulty
CPU in a vintage computer (or peripheral).
Wow, that's bizarre. 6502s don't fail very often.
I can't remember if I'ev ever had to replace a 6502, but I've certainly
had other CPUs fail. Z80, 8085, 6800, 8035 (fortunately ROMless), some
6803-seires microcontrolelr (again ROMless), and so on.
My expeirence, as I've said beore is that while LSI ICs (including
microprocessors) are more reliable than the same circuit built from TTL or
discretes, the LSI chips are less reliable than idividualt TTL ICs.
-tony