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From: cur022%cluster@ukc.ac.uk (Bob Eager)
Newsgroups: comp.sys.ibm.ps2.hardware
Subject: Re: IBM PS/2 Model 50 Clock and Mouse Problems
Message-ID: <22613.2861c14d@cluster.ukc.ac.uk>
Date: 21 Jun 91 09:05:16 GMT
References: <1991Jun19.165223.15297@ms.uky.edu> <91171.101417U39648@uicvm.uic.edu>
Organization: Computing Lab, University of Kent at Canterbury, UK.
Lines: 36

In article <91171.101417U39648@uicvm.uic.edu>, U39648@uicvm.uic.edu (Darius Vaskelis) writes:
> 1. Obtain the latest DASDDRVR.SYS file and make sure it's installed in
>    your CONFIG.SYS file.  It's recommended to be the very first line of
>    the CONFIG.SYS file.  It fixes all sorts of problems with earlier
>    PS/2s with DOS.  The latest one I've seen is 1170 bytes long, and
>    you can get it by contacting your IBM authorized dealer if you're
>    an individual or your IBM marketing or technical support rep if
>    you're an organization.  It also can be found on any IBM PS/2
>    Reference Diskette for any model PS/2, provided it's a new enough
>    version of the reference.  I believe the latest Reference Diskette
>    for the Models 50/60 was 1.06.

It might be worth mentioning, for the curious, that this file doesn't just
fix DASD (the IBM word for disk) problems. It was originally intended for that;
what it actually contains are at least half a dozen BIOS patches to fix
various disk, clock and other bugs in early revisions of the various IBM
BIOS ROMs on PS/2s. It does a lot of checks on the precise BIOS revision, and
doesn't install itself if it isn't needed. So, there is no harm in installing
it anyway; it won't take up space unless you actually need it.

As far as I am aware, there is one DASDDRVR.SYS for *all* PS/2s except the
Model 30; it installs the bits needed for the appropriate system and BIOS
revision. The Model 30 one is different (the machine itself is substantially
different, e.g. it isn't MCA).

If you're using OS/2 (from IBM) it automatically installs an F?????.BIO
file which does the same job. The numbers after the F refer to the machine
type and BIOS revision being fixed.

P.S. DASD = 'Direct Access Storage Device'    (I think)
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Bob Eager                   | University of Kent at Canterbury
rde@ukc.ac.uk               | +44 227 764000 ext 7589
rde@ibmpcug.co.uk           |
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