17 Apr
1999
17 Apr
'99
3:53 p.m.
Allison wrote:
Again all of the 8085s had the extra unsupported
instructions as they were
deem important!
The officially undocumented Z-80 are fairly well known and documented. But
I've never heard about undocumented 8085 instructions. There weren't too
many left-over opcodes on the 8085, and it seems unlikely that they would have
put in logic to handle two-byte opcodes only for undocumented features, so
I'm guessing that there aren't very many of them. What were they?