Undocumented 8080 instructions?

Richard legalize at xmission.com
Sun Dec 26 13:43:46 CST 2010


In article <4D164D02.6030004 at brouhaha.com>,
    Eric Smith <eric at brouhaha.com> writes:

> Chuck Guzis wrote:
>  > To the best of my recollection, the undocumented 8080
>  > opcodes are, by and large, no-ops or redundancies (i.e. they do the
>  > same as a close-valued opcode probably from incomplete PLA decoding).
> [...]
>  > No startling new "triple precision divide" instructions.
> 
> I wasn't expecting any.  The reason I'm asking is to be able to 
> replicate the behavior in a simulator, in case any software happened to 
> use them (intentionally or otherwise).

Didn't the visual 6502 guys also have a project to do the 8080?

http://www.visual6502.org/

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