On Feb 24, 11:20=A0pm, David Wilson  wrote:
> On Feb 25, 2:09=A0am, Steven Hirsch  wrote:
>
> > Does anyone know if the MMI PROM on older Disk ][ controllers has the s=
ame
> > pinout as any of the 74S* programmable PROMs? =A0I'd like to read the c=
ontents,
> > but would prefer not to let the magic smoke out of my programmer.
>
> According to my Xref databook, the 6309 has the same pinout as
> DM74LS471 and N82S136N and a few others.

Bit of trivia - local (Bulgarian) Disk ][ controllers were made with
2x 4-bit PROM pairs, as sources of 8-bit must've been scarce during
those years (CoCom and friends).
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