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?


-- 
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space,  a critter that can
be killed but can't be tamed.  --Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James 
M Dakin



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