OT: An AVR "blast from the past"

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#1
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Oh, you think you are an AVRFreak, do you? Well: how many have worked with a '1300, '2312, or '8514? I know I haven't.

http://cgi.ebay.com/ws/eBayISAPI...

"AVR - ATMEL CORPORATION ENHANCED RISC MIROCONTROLLERS DATA BOOK - MAY 1996 - PRELIMINAY. INSIDE: OVERVIEW, AT90S1300, AT90S2312, AT90S8414, ..."

I >>do not<< think this is the updated printed databook that was discussed in a recent thread. :)

Lee

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That part list sounds like it came from the Land of Misfit Toys.

j.

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"off by one bit"... like anybody want a 7bit processor!? Process
ASCII better than anything in the world?! Whoa.. good that some things
never make it. Darwin of CPUs.

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I used to program these things the MC14500.
It is a 1 bit microprocessor.
Motorola or was it RCA used to made the CMOS MC14500 Industrial Control Unit.
It had 16 four bit instructions, a program counter, a 1 bit register with carry, the works. Anybody else remember programming them?
http://www.cpu-museum.com/14500B...

We used to do creative things like run 8 of them in parallel to process 8 bit data.
But it's main purpose was to replace relay logic systems. But like all things it's a dinosaur now, but there are still fossilzed examples about.

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Well the AT90S1300 was one little hot rod.
With an external clock she could run at 24 MHz.

Peter

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The 8514 was an 8515 with half the memory.
It was probably just the same part.

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