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1985-02-09
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896b
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25 lines
Date: 10 Jan 1982
From: Frank J. Wancho <FJW>
To: All
Re: MTN 2.2A DCHayes Bug Fix
With the help of Ron Fowler, we tracked down the bug using an
old listing of MTN 2.1. (My listing and disk for MTN 2.2A are
apparently permanently and irretrievably archived...) I have just now
found a machine with a DCHayes modem in it and tested the following
patch - and it worked! With this patch installed in a copy of the
uncustomized MTN22A.COM, REName it to MTN22B.COM. My apologies to all
for not finding and fixing this rather elusive bug much sooner...
This patch will prevent a reentered MTN from hanging up the phone when
there is a carrier already present:
21B4 -> 3E A5 00 (LD A,0A5H)
27ED -> 42 ("B")
For those who still have 2.2, this upgrades it to 2.2A:
2.2 -> 2.2A 11E4 to 11E7 -> 00
--Frank