And many EEPROM's if flashed incorrectly cannot be reverted back by re-flashing....some can...most can't.
They all can. The only point of contention is that generally there is no way to do that without a working BIOS.
That's what the backup "emergency" BIOS ROM's are for. In this case the main ROM is corrupted (or more precisely, it refuses to use it) so it's booting up to the special BIOS designed with the specific purpose of facilitating a floppy-based flash (thus why it requires a diskette)
All EEPROMs are re-flashable. It's right in their name- Electrically Erasable.
What is needed is what I noted previously. a Diskette with the appropriate Award Flash utility and the correct BIOS .BIN file for the machine. (I'm not sure wether that particular backup ROM will actually attempt to boot to the diskette or perform the flash immediately)
http://www.birdjanitor.com/bootblock.htmlIt seems I was wrong on a few of the speculations I made regarding the bootblock; it's not actually on a separate chip, but is on the same EEPROM as the normal BIOS code; however, very few flash procedures write to it. Also, we can say with 100% certainty that there is no problem with the boot block, since it is clearly working and trying to do exactly what it was designed to.
In any case, the link above provides some information on what procedures to follow to get the BIOS flashed properly.
Also, let this be a lesson that updating the BIOS for no reason is a great way to waste a weekend.