From: msschaa@cs.vu.nl (Schaap MS)
Newsgroups: comp.os.msdos.programmer
Subject: Re: Logitech mouse driver and COM port programming
Keywords: mouse, logitech, com1, com3, com4, com2
Date: 30 Jul 91 11:23:11 GMT
Organization: Fac. Wiskunde & Informatica, Vrije Universiteit, Amsterdam

In article <1991Jul29.155028.21640@doug.cae.wisc.edu> bodoh@cae.wisc.edu (Daniel Bodoh) writes:
>I have a question and the Logitech techs weren't much help:
>I have a Logitech mouse on COM1 with version 4.10 of the driver.

You could try using version 5 of the driver.
FTP to wuarchive.wustl.edu, directory mirrors/msdos/mouse,
filename something like drvr501.zip.