Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!pasteur!ames!amdahl!pacbell!sactoh0!ianj
From: ianj@sactoh0.UUCP (Ian R. Justman)
Newsgroups: comp.os.cpm
Subject: Bug in ZMP 1.4's dialing routine
Keywords: hang up, linefeed, carriage return, fix
Message-ID: <951@sactoh0.UUCP>
Date: 5 May 89 20:13:44 GMT
Organization: SAC-UNIX (Public Access), Sacramento, Ca.
Lines: 21

There is a slight bug in ZMP 1.4's dialing routine.  It sends a
linefeed as well as a carriage return to the modem causing some
modems to hang up before dialing.  Here's where the faulty code
resides:

0B82	LD	HL,0Ah
0B85	PUSH	HL
0B86	CALL	1437

To fix this bug, put zeroes in locations 0B82h-0B88h (opcode for
NOP) and then save the program using the command:

A>SAVE 56 ZMP.COM

Happy modeming!

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