Re: Convert your Z80 pod to Z80/AA

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Minor changes actually, the crystal is bumped up to 6.5Mhz, and a pull up
resistor is added, plus one other small change..and they do recommend the
shielded cable. I shall scan the sucker in and post in a day or two...

John :-#)#

At 08:35 AM 17/09/2002 -0700, Paul Swan wrote:

>Hi John,
>
>Hmm, I have a Z80/AA pod and a Z80 pod and have took them appart to see
>what the difference is and there appeared to be no difference at all.
>
>The Z80 pod was manufactured 1982 (by chip date code), the Z80/AA pod
>was manufactured 1988 (again, from the chip date codes). That was it.
>Z80B in both. Same logic families. Same EPROM. Same 1980 PCB.
>
>I too expected that the AA was a faster version but I could find no
>evidence that this was the case or any other difference from the none-AA
>version at all.
>
>Regards,
>
>Paul.
>
>
>John Robertson wrote:
> >
> > i just got in, with a pile of other items, a three page modification for
> > the old Z80 pod to make it work up to 6Mhz. (Z80B). It appears to be an
> > Eprom change, shielded cable (that may not be required - test) and some ALS
> > parts. A couple of cuts and jumper wires and you are on your way.
> >
> > I'll scan it in to the FTP site in a day or two - if anyone want sit that
> > is... otherwise I'll get around to it someday...
> >
> > John :-#)#

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Received on Tue Sep 17 11:00:26 2002