Re: Interesting programming description for bank selection

From: Michał Pleban <>
Date: Wed, 23 Apr 2014 14:36:10 +0200
Message-ID: <>

HÁRSFALVI Levente wrote:

> Well, then they might have produced both. One of my friends has talked
> me about a Soviet i8255 clone that he could in no way use, as the chip
> just didn't fit the socket ;-). Back in the early '90s, when he started
> building circuits, standard MSI components (and above) were still hard
> to come by / expensive here, so young techies like him just cooked from
> what they could obtain (thus the Soviet stuff). I've never met those
> Soviet MSI clones myself (though, even I should have some K155***s
> packed away somewhere at home |-))) ).

That is interesting. My father works in a Polish institute producing
radars since the beginning of '70s, they had lots of Soviet chips
(though of course they used Polish CEMI parts wherever they could) and
he supplied me with them in the '90s. I never had such problems with
them. I specifically remember Soviet EPROMs, they had this strange
bulging window protruding 2-3 milimeters above the chip casing. He
programmed them for me at the institute, as virtually nobody had
programmers back then. They were 27xx-compatible and fit in a standard
DIL socket.

I will ask him about this pin spacing stuff, maybe he would remember
something interesting...


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Received on 2014-04-23 13:01:00

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