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From: 2212msr@whuts.UUCP (ROBIN)
Newsgroups: net.micro.pc
Subject: Re: PC/AT memory size/error; help needed
Message-ID: <607@whuts.UUCP>
Date: Thu, 27-Mar-86 09:04:30 EST
Article-I.D.: whuts.607
Posted: Thu Mar 27 09:04:30 1986
Date-Received: Fri, 28-Mar-86 06:49:23 EST
References: <227@spdcc.UUCP>
Organization: AT&T Bell Laboratories
Lines: 23

> In pirating my AT for a memory board to put in my AT clone, I find now
> that I cannot reboot the AT: I neglected to run SETUP from the diagnostic
> disk first to resize the CMOS RAM's idea of how much memory I have.
> Instead, the boot ROM sizes memory up to its new hi-water point, then
> reports a 201-- memory error, then reports a memory size error, then
> says "Run SETUP".  However, although the diskette then runs as if to
> boot from disk, the system then simply hangs.  The behavior is identical
> regardless of what copy of AT Diagnostics or DOS I load.
> 
> Short of taking down and opening up a perfectly well-running system to
> temporarily snarf the memory board back, is there anything I can do?
> I tried unplugging the battery from the board, but that seemed to have
> no effect.
> -- 
I did some swapping of memory boards on my AT and found that simply inserting
the diagnostics disk (either one that comes with the machine or IBM's Adv. 
Diag.)and runnign setup was all that was required to overcome the error.
My machine had been configured with 3M and in the swapping/experimenting
process it was reconfigured numerous times with memory ranging from
512K to 3.5512K to 3.5M with no problems.

Max Robin
email:whuxg!2212msr