Re: PLAs, anyone?

From: silverdr_at_wfmh.org.pl
Date: Fri, 2 Aug 2019 01:13:15 +0200
Message-Id: <386C3123-6AFD-45C7-943B-DA41A7E96457_at_wfmh.org.pl>
> On 2019-08-02, at 00:02, HÁRSFALVI Levente <publicmailbox_at_harsfalvi.net> wrote:
> 
> Almost forgot to comment that there was once a Soviet copy of the 82S100
> / PLS100 (--> KR556RT2), which seems to be available from eBay sellers
> today. ...While that might sound bizarre, and is AFAIK also a completely
> untested route in spite of a prospective Commodore PLA replacement
> (...who knows if all the original specs of the 82S100 have been kept at
> the first place), it might have some potential. The chips (new old
> stock) currently sell for some $7.5 + p&p / 5 pieces... which is around
> the price of the cheapest PLS100 chip I could find (a piece, that is).
> Personally, I have no serious doubts about the general reliability of
> (post-) Soviet chips. The risk of running into counterfeits while
> shopping for NOS KR556RT2 chips should be also really small I guess... ;-)))

I found those too. One risk is that they may not be fully timing-wise equivalent (assuming that they are fully functionally equivalent), another is whether they are programmed the very same way (need to search deeper if there's a valid datasheed available somewhere) and the last (common for all, actually) is that even if counterfeiting may not be an issue, the main question is whether they're really unprogrammed. Right now I am looking for a programming option. Of course the programmer I coughed up some $s not so long ago to be able to program Atmel's GALs does not have a way to treat the chips in question.

-- 
SD! - https://e4aws.silverdr.com/
Received on 2020-05-29 22:16:26

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