Z80 TRAP and CP/M

Chuck Guzis cclist at sydex.com
Tue Apr 4 15:09:28 CDT 2006


On 4/4/2006 at 2:30 PM Roy J. Tellason wrote:

>On Tuesday 04 April 2006 10:23 am, Chuck Guzis wrote:
>> Everyone knows that Z80 timings are wrong for an 8259.
>
>They are?

If  you want to use the 3-byte CD xx xx vectored output of the 8259 they
are.  AFAIK, the Z80 doesn't output 3 INTA pulses in response to an INTR-CD
sequence, although with enough glue, I suppose anything's possible.

Cheers,
Chuck





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