4 Apr
2002
4 Apr
'02
3:46 p.m.
--- "Peter C. Wallace" <pcw(a)mesanet.com> wrote:
> > Yeah, there is the old 7400 series
arithmetic unit...
>
> The 74x181. I've used it many times. It's also used in many of the
> computers that I love (like the classic PERQs and the PDP11/45).
If anyone needs a few, I have a source here in town... the same place
I got my TI 980A from. He doesn't have tubes and tubes, but I think
a handful could be scored. These are 1972-era 74181s, not 74F181s,
if that matters for your application. He would be very happy to trade
some for BCD TTL for his electronics students (7492/74192 and similar
counters keep coming up in our conversations). He has a limited class
budget, so he would rather swap stuff than go to the well for extra
dollars for chips that the electronics lab has run out of.
-ethan
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