Hand clocking CPUs

[Dave McGuire]

On 7/21/10 5:24 PM, Eric Smith wrote:
>> A single-stepping circuit for a Z80 is pretty simple.
> 
> True, but it is not quite as simple as hooking up a debounced pushbutton
> to the clock, which was how I interpreted the OP's question.

  Yes, I suppose you're right.  It's much nicer (IMO) to do the full
trick by asserting /WAIT with /M1, a flip-flop, AND a debounced
pushbutton, though.  Then you get true instruction stepping, rather than
cycle stepping.

            -Dave

-- 
Dave McGuire
Port Charlotte, FL