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From: gnome@olivee.UUCP (Gary Traveis)
Newsgroups: net.micro.att
Subject: Re: PC6300 and PC-DOS
Message-ID: <454@olivee.UUCP>
Date: Wed, 14-Aug-85 13:28:57 EDT
Article-I.D.: olivee.454
Posted: Wed Aug 14 13:28:57 1985
Date-Received: Sat, 17-Aug-85 16:14:52 EDT
References: <2062HBX@psuvm>
Organization: Olivetti ATC; Cupertino, Ca
Lines: 30

> I recently purcased an AT&T 6300, and for reasons of compatibility
> with existing software, must run IBM's PC-DOS rather than use
> Microsoft MS-DOS 2.11 for the 6300.  To date everything has worked
> well, (I am using the newest revision of the BIOS, Ver. 1.21.),
> except for one thing.  The system clock gains time.  If I set
> the time correctly when I boot, leave the system unattended for
> a few hours and then check the time, it may gain as much as
> 15 minutes.  Can anyone else confirm this, and does anyone
> have a fix?
>      
> Terry Harrison
> 310 Business Administration Building
> Penn State University
> University Park, PA  16802
> (814) 863-3357
>      
> BITNET: hbx@psuvm
> UUCP:   ....!psuvax1!psuvm.bitnet!hbx
> ARPA    hbx%psuvm.bitnet@wscvm.arpa
>      

The ATT 6300 has an on-board CMOS battery backed-up clock.
PC-DOS doesn't make use of that circuit, and because that
6300 runs a lot faster than an XT, the software clock gets
ahead pretty quickly.  See if you can do set/reads from the
hardware clock.

Gary
(hplabs,allegra,ihnp4)oliveb!olivee!gnome
@Olivetti ATC, Cupertino, CA -- where the 6300 was designed.