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Subject: the way I would do it
Name:
 ludicrous
Date: 3/5/2002 10:24:46 PM (GMT-7)
IP Address: 138.67.74.229
In Reply to: Re: CMOS posted by
Castle50
Message:
...if I was in your situation, is to start comparing the physical chips between my scrap board collection and the board I wanted to repair. Ideally, the donor board will be one that can at least boot a floppy, even if very little else.
Then, look up the specs for both the donor, and the "to be fixed" board, on the manufacturer websites -- and verify if they are the same BIOS chip density (usually 1 or 2Mbit, as noted by JFreak). You can probably do this easily by browsing the lists of available BIOS updates. If so:
(1) Download the most recent BIOS for the board you are repairing.
(2) Boot the "donor" board to a command prompt, and flash the BIOS chip with the code for the "to be fixed" board. (Uh, success OR failure, the donor board is now toast, so make sure it's one you don't want to keep around.)
(3) Pull the EPROM chip from the donor board, pull the EPROM chip from the "to be fixed" board (and make CAREFUL note of the orientation), insert the newly flashed donor chip.
(4) If the flash was successful and the chip is oriented correctly in the socket, the "fixed" board should operate normally. If the flash was not successful...you may have lost the EPROM chip, unless the "to be fixed" board has an auto-flash recovery feature. And if the chip is inserted incorrectly, the magic smoke will quite possibly come out 
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