Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!think!snorkelwacker!apple!well!oster
From: oster@well.sf.ca.us (David Phillip Oster)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Serial interface replacement for mouse
Message-ID: <16784@well.sf.ca.us>
Date: 21 Mar 90 03:19:42 GMT
References: <1990Mar19.001639.28530@caen.engin.umich.edu>
Reply-To: oster@well.UUCP (David Phillip Oster)
Organization: Whole Earth 'Lectronic Link, Sausalito, CA
Lines: 10

I wrote a the driver software for serial digitizing tablets once sold by Kurta.
You can use a serial device as a replacement for a mouse if you call your
SetMouse routine from the completion routine of the aysnchronous serial i/o
that is reading the serial port. Of course, you can't use a SetMouse that has
a Delay in it, and you can't change the cursor while it is busy. Setting the
button state is more of a problem since there is a VBL that resets it from the
hardware, and some VBL tasks look at the button state.
-- 
-- David Phillip Oster - Note new address. Old one has gone Bye Bye.
-- oster@well.sf.ca.us = {backbone}!well!oster