Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!bcm!dimacs.rutgers.edu!mips!sjsca4!poffen
From: poffen@sj.ate.slb.com (Russ Poffenberger)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Runaway Motherboard
Message-ID: <1991Jan31.224210.27813@sj.ate.slb.com>
Date: 31 Jan 91 22:42:10 GMT
References: <1816@devildog.att.com> <2169@njitgw.njit.edu>
Reply-To: poffen@sj.ate.slb.com (Russ Poffenberger)
Distribution: na
Organization: Schlumberger Technologies, San Jose, CA.
Lines: 19

In article <2169@njitgw.njit.edu> cd5340@mars.njit.edu (Charlap) writes:
>The problem might also be in your clock battery.  Solid-state clocks
>tend to speed up as the battery dies, until they stop all together.
>
>Try replacing it.  A Ray-o-vac computer battery costs about $9 at 
>trade shows.  Mine has gone about 2 years without a problem.  Before,
>when I was using lithium watch cells, the clock would run away from
>me all the time.
>

The CMOS real-time clock does NOT drive the system clock while the system is
running. It is read once at boot time, then the BIOS keeps the time. Also,
the CMOS clock is usually powered by the system power supply when on, not by
the battery (this is only while turned off).

Russ Poffenberger               DOMAIN: poffen@sj.ate.slb.com
Schlumberger Technologies       UUCP:   {uunet,decwrl,amdahl}!sjsca4!poffen
1601 Technology Drive		CIS:	72401,276
San Jose, Ca. 95110             (408)437-5254