> I think the 6502 was less 'general purpose' than the Z80 (which I've seen huge banks of in Honeywell FEP's, years ago, f.e.). Z80 has more registers than a 6

> I think the 6502 was less 'general purpose' than the Z80 (which I've seen huge banks of in Honeywell FEP's, years ago, f.e.). Z80 has more registers than a 6502, plus that built in dram refresh was nice to have. They're still useful for quite a bit, which may explain why you can still find Z80 parts on digi-key.