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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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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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