Undocumented 8085 opcodes? (was Re: z80 timing... 6502 timing)

From: Eric Smith <eric_at_brouhaha.com>
Date: Sat Apr 17 19:53:33 1999

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?
Received on Sat Apr 17 1999 - 19:53:33 BST