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- Path: sparky!uunet!utcsri!utgpu!attcan!john
- From: john@attcan.UUCP (John Benfield)
- Newsgroups: comp.os.msdos.misc
- Subject: Re: CMOS Setup on Tandy 2500 XL?
- Message-ID: <19260@vpk1.UUCP>
- Date: 20 Nov 92 15:46:38 GMT
- References: <1992Nov18.102441.8806@iscsvax.uni.edu>
- Organization: AT&T Canada - MIS Network Development
- Lines: 53
-
- In article <1992Nov18.102441.8806@iscsvax.uni.edu>, kraai4712@iscsvax.uni.edu writes:
- > How do I get to the setup on a Tandy 2500 XL?
- >
- > I get a message saying something like:
- > "Invalid configuration, press <F1> to continue"
- >
- > I unhooked my printer from LPT1 and am now using a switchbox on COM1.
- >
- > Obvious question: Are these related? Why?
-
- Probably not.
- No PC system that I know of keeps track of port connections in CMOS,
- so it's very unlikely that the error has anything to do with what devices
- you have on which ports. Though it could be related to the fact that you
- CHANGED the connections (hold on...I'll explain :)
-
- I've heard of cases where machines with shoddy electrical isolation
- on the ports will actually lose CMOS configuration or suffer some sort
- of damage when you change connections with the machine or peripheral
- powered up. In other words, connecting devices live sends a blast through
- you machine and nukes a few bits inside (some time permanently). This
- can also happen with static charges with both systems powered off.
- (pretty rare though, unless you're in a high static environment)
-
- Another situation the may occur is that the CMOS backup battery may
- be low and connecting a device causes an additional load (to the
- powered off, badly isolated machine) that causes the current to dip
- just low enough to lose a few data bits. It's an unlikely situation,
- but possible. It would require that the port be poorly isolated, the
- battery backup system be badly designed and that both be eletrically
- connected even when the machine is turned off
-
- It's probably nothing to worry about. Just reconfigure your CMOS
- (check your manual under CMOS, SETUP or NON-VOLATILE MEMORY to
- find out how). You might also want to check your backup battery.
- If you continue to experience the problem, swap your battery and
- if you STILL have the problem, take it in for repair.
-
- >
- > Thanks. --jim
-
-
- ______Opinions stated are my own. Transcripts available by request______
- ===
- =--==== AT&T Canada Inc. John Benfield
- =----==== 3650 Victoria Park Ave. Network Support Analyst (MIS)
- =----==== Suite 700
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