27 Sep
1999
27 Sep
'99
7:12 p.m.
Date: Tue, 28 Sep 1999 19:06:02 -0400
Reply-to: classiccmp(a)u.washington.edu
From: Roger Merchberger <zmerch(a)30below.com>
To: "Discussion re-collecting of classic computers"
<classiccmp(a)u.washington.edu>
Subject: Re: Ace & Security
Anyone care to take a guess as to the difference?
The 12887A has a "erase" pin on the package, so even if there are no
jumpers on the motherboard to erase the CMOS, you can jumper that pin to
ground for a few seconds and Voila! Wiped settings.
To clarify that, that shorting withing futher steps do NOTHING. The
usual practice is jumper it and toggle power for few seconds then
power down and pull aside that jumper.
a 12887A, or wait 10+ years for the battery to die.
(even for that, the
board's close to useless... once you turn off the 'puter, it'll forget all
your CMOS settings.)
12B887 is same thing too as 12887A far as I can tell.
PDF's of those parts are available from Dallas's website, which IIRC is
http://www.dalsemi.com/
HTH,
Roger "Merch" Merchberger
--
Roger "Merch" Merchberger --- sysadmin, Iceberg Computers
Recycling is good, right??? Ok, so I'll recycle an old .sig.
If at first you don't succeed, nuclear warhead
disarmament should *not* be your first career choice.
Wizard