Rockwell PPS-4 info (was 8008 v. 4004...)

Brent Hilpert hilpert at
Thu Dec 18 21:30:57 CST 2008

Chuck Guzis wrote:
> On 18 Dec 2008 at 9:31, Brent Hilpert wrote:
> > 60's era ones yes, but by 1978 or earlier they were like this:
> >
> >
> >
> > LED display, keypad input. A friend has one, still in use, but I haven't bugged
> > him to let me look inside it. Could have been done with an ASIC of course but
> > it would also have been a good candidate to have used some mask-programmed 1 or
> > 2 chip micro such as the PPS-4/1.
> A Toshiba microwave (just junked) from the same time has 4000-series
> SSI CMOS and not much more.  Same goes for the 1978 Amana still
> sitting on my kitchen counter.  I think microprocessors might not
> have reached a competitive price point yet.

Scratch that one from the list then. I'm mildly surprised. They may not have
been making them by the millions but I would have guessed they were making
enough of them to make LSI worthwhile over SSI.

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