--- Nicolas Welte <welte@chemie.uni-konstanz.de> wrote:
> Daniele Gratteri wrote:
> > > The design is freeware, please do.
> >
> > Ok, I published it on my web site. You can find it at
> > http://utenti.tripod.it/danielegratteri/65028501.gif
>
> I just had a quick look at the design, because I once thought about making my
> own, but to save parts (one inverter) I would've used a 6526.
Since the 6522 was made by multiple vendors (Rockwell, MOS, Synertek, UMC...),
I would think that it's a "safer" chip to use. The 6526, while millions
were made, was strictly a Commodore/MOS product, right?
While I'm on the subject of 40-pin 6502-family ICs, while fixing up amn AIM-65
this weekend and going through my bins of parts, I ran across both 6522 chips
and 6522A chips. Are there any substantial differences? Current drive on
the output ports? Anything?
-ethan
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