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computers / comp.sys.apple2 / Legend RAM S' Card - Logic Troubleshooting

Legend RAM S' Card - Logic Troubleshooting

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https://news.novabbs.org/computers/article-flat.php?id=5417&group=comp.sys.apple2#5417

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From: dog_cow@macgui.com (D Finnigan)
Newsgroups: comp.sys.apple2
Subject: Legend RAM S' Card - Logic Troubleshooting
Date: Tue, 11 Jul 2023 19:26:17 -0000 (UTC)
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by: D Finnigan - Tue, 11 Jul 2023 19:26 UTC

FozzTexx recently acquired a 1 MB Legend RAM S' Card, but discovered it had
some glitch which affected display of hi-res screens. As part of
troubleshooting, he derived a schematic from the board, then even recreated
part of the bank-select logic on a breadboard!

Follow his troubleshooting to its startling conclusion. If you like stories
with surprise endings, this is a good one.

https://www.insentricity.com/a.cl/287/look-at-that-scard-go

Subject	Author
Legend RAM S' Card - Logic Troubleshooting	D Finnigan