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traneus
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RS flipflop using single PAL output
traneus   8/23/2016 8:51:18 PM
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I recall there was a way to build an RS (set-reset, no clock) flipflop using just one unregistered PAL output, using the hand-design approach. In CUPL, it was impossible, as CUPL would optimize out the redundant-to-CUPL product term.

antedeluvian
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re: How It Was: Programmable Logic
antedeluvian   12/9/2011 6:41:28 PM
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Here is a story in a similar vein. http://www.edn.com/article/509249-An_old_PAL_saves_the_day.php I have cross posted back to here

Max The Magnificent
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re: How It Was: Programmable Logic
Max The Magnificent   11/14/2011 6:50:25 PM
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Aubrey sent the pics to me and I just added them into the article...

antedeluvian
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re: How It Was: Programmable Logic
antedeluvian   11/13/2011 3:29:38 PM
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Accessing the "before" was difficult in a basement full of furniture from migrating children. Max has the photos now. I am sure the photos will raise a smile.

David Ashton
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re: How It Was: Programmable Logic
David Ashton   11/12/2011 10:02:53 PM
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Thnaks Aubrey for that insight. I still have a handful of these devices (PALCE22V10 and the like) recovered from old boards and have wondered what I can use them for (maybe hexadecimal 7-seg or 5x7 dipsplay decoders or something, but I am glad there is PALASM and PCs around to do it instead of working it all out manually like you did... PS. No before and after pics??

Max The Magnificent
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re: How It Was: Programmable Logic
Max The Magnificent   11/11/2011 3:34:31 PM
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The thanks should go to Aubrey for taking the time to write all of this down... ...maybe you have some tales to tell of your own?

ReneCardenas
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re: How It Was: Programmable Logic
ReneCardenas   11/11/2011 3:27:30 PM
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Max, thanks for the memory refresh, PAL and GALS were my intro to replacing LSI in NASA JSC costumized hardware.



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