1541 Assy# 250442

From: silverdr_at_wfmh.org.pl
Date: Mon, 21 Nov 2016 19:18:21 +0100
Message-Id: <9E4C5B73-FB3E-4CAC-AB8C-E397111A287A@wfmh.org.pl>
Do we have correct schematics for this 1541 board?

It uses 74LS123 in place of DM9602 but all the schematics I found refer to the 9602 mulitvibrator, which - as Ruud noticed here:


seems not to be a drop-in replacement. Also I found that:


says: "1541A2   250446-01   A 74LS123 replaces the 9602 at UD4" but all 250442 I have are already equipped with '123


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Received on 2016-11-21 19:00:02

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