I am after a 4004 chip. Do you which calculators used one?
Thank you
Ciao
enrico
Larry Groebe wrote:
>
> >On Fri, 8 May 1998 Philip.Belben_at_powertech.co.uk wrote:
> >
> >> The electronic one was interesting mainly for its display. It was
> >> fluorescent (greenish digits sealed in a long glass tube), but not
> >> 7-segment. Instead, there were (I think) nine segments, all of strange
> >> curly shapes, which made up digits much easier to read than the angular,
> >> blocky, 7-segment types. But I can no longer remember how these were
> >> arranged, nor even any details like the manufacturer of the calculator.
> >>
> >> Does anyone know of machines with such displays?
> >
> >Somebody was describing this same calculator to me yesterday. It was the
> >Sharp EL-8 and had a 9-segment display.
> >
> >> At what date were they made?
> >
> >Weren't these the first microprocessor-based calcs (4004) from around
> >1974?
> >
> The EL-8 was Sharp's original portable calculator from 1971 (in Japan in
> late 1970) and cost $345 back then (for your basic 4-function
> calculator!) The display is listed in my reference book as a flourescent
> -type tube display.
>
> I don't believe it used the 4004 chip - relatively few calculators
> actually did use the 4004.
>
> --Larry
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Received on Sat May 09 1998 - 01:25:19 BST