Monroe Programmable Electronic Calculator
melamy at earthlink.net
Fri Feb 29 09:07:57 CST 2008
my high school got one in 1971 and through the punch cards, you could get to binary &, |, and shift commands as well as program jumps. I have a complete one in a box with reader, manuals, unused punch cards, etc. It was an eBay nostalgia buy a few years ago. One of these days, I will be organized enough to have it on a table to play with it. It was always fun to see the flashing nixie tubes as it ran calculations.
As to the tech inside, I would expect that it was a multi-LSI "big" chip dedicated calculator design, so any memory was probably implemented as registers in the chips. JUst a gues anyway.
best regards, Steve Thatcher
>From: Brian Knittel <brian at quarterbyte.com>
>Sent: Feb 28, 2008 10:58 PM
>To: cctalk at classiccmp.org
>Subject: Re: Monroe Programmable Electronic Calculator
>Ooooh! That's really cool. My high school had one of
>these around 1975 or 1976, we used it before we talked them
>into buying an Altair. The punch card unit was pretty spiffy,
>I think it used 8 of the row bits? And IIRC there were
>instructions you could punch that were not available from
>the keyboard. The cards were the votamatic type: hanging
>chad and all. It was a lot of fun to program, and pretty
>interesting and complex for a calculator.
>I'd love to know what the memory technology was inside
>-- acoustic delay, static RAM, or what?
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