Forgotten PC History
Roy J. Tellason
rtellason at verizon.net
Mon Aug 11 22:13:56 CDT 2008
On Sunday 10 August 2008 04:53, Eric Smith wrote:
> Philip Belben wrote:
> > I have a couple of Sharp calculators from about that date. I just
> > grabbed the nearest (an ELSI-160) and opened it up, to find that the
> > four chips have date codes in early 1971 and forty-two (yes, 42) pins
> > each in a dual zigzag arrangement.
> 42-pin DIP packages were common among Japanese semiconductor vendors but
> I don't recall seeing any from US vendors.
> For example, the early NEC cassette/cartridge tape controller chip,
> uPD371 was in a 42-pin DIP. I think their single-density floppy
> controller chip, uPD372, might also have been in a 42-pin DIP.
I think I may even have a NEC databook that features some of those, and
remember how odd it was that those seemed to me at the time. Probably
somewhere around 1978, maybe?
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