That's correct...I counted and then forgot.  So, same story, but start with
a 2764 and go up from there.  At some point you can stop, because in 1983
they didn't make the bigger sizes yet.

Barry

On Mon, Feb 4, 2013 at 1:06 PM, Bob Blick <bobblick@ftml.net> wrote:

> The picture showed a 28 pin device, so it's probably at least 64 Kbits.
>
> Cheers,
>
> Bob
>
> On Mon, Feb 4, 2013, at 12:56 PM, Barry Gershenfeld wrote:
> > ROMs for those games matched up with the 24-pin EPROMS of the day.  271=
6
> > would be a good starting guess.  If it's still in the circuit you can
> > deduce the details of the pinout.  If you want to read it out, you can
> > hook
> > it up as a 2732 and if you've got the smaller part you will just get tw=
o
> > copies of the same file.
>
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