Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ulowell!m2c!applix!jim
From: jim@applix.UUCP (Jim Morton)
Newsgroups: comp.unix.xenix
Subject: Re: using a Logitech Bus Mouse with SCO 2.3.1
Summary: 10 bits of IO addressing
Message-ID: <963@applix.UUCP>
Date: 25 Apr 89 13:45:59 GMT
References: <532@tiamat.fsc.com> <764@dms.UUCP> <589@lilink.UUCP> <540@tiamat.fsc.com>
Organization: APPLiX Inc., Westboro MA
Lines: 16

In article <540@tiamat.fsc.com>, jim@tiamat.fsc.com (Jim O'Connor) writes:
> that the cause might be connected to the "number of bit of I/O address
> decoding" that the system bus performs.  For instance, on Mike's system,
> on which the mouse works from COLD boot, the following boot output is
> generated:
> 		*A10 bits of I/O address decoding

What this means is that you can't use I/O port addresses higher than 0x3FF,
like some newer serial port cards use. (The "standard" AT serial/parallel
adapter lives at INT 4, IO 0x3F8 for the serial portion) Also, PS/2 machines 
have I/O port addresses higher than 0x3FF. Can anyone post a listing of what 
AT bus machines go above 0x3FF ??
--
Jim Morton, APPLiX Inc., Westboro, MA
UUCP: ...harvard!m2c!applix!jim
      jim@applix.m2c.org