edit: woops...the below are BIOS revisions
1.05 fixed these things:
Fix ASUS PC Probe shows CPU temperature much higher than the actual one after resuming from Suspend-to-RAM.
Remove Set off APM Mode 1.0 checking, fix Win 2000 APM cannot shut down.
The choice of 3mode floppy can only be disabled and enabled.
Add microcode update for Katmai & Coppermine.
Reserve IRQ 12 for PS/2 device other than mouse in Windows 98 ACPI mode when "PS/2 mouse function control" menu item is forced to be "Enabled".
Fix IDE hard drive having a formatted partition larger than 8.4G bytes cannot be enumerated by OS in "User Type HDD" mode.
Fix the system cannot boot from Sony DDU220E DVD-ROM.
Fix PME not enabled for some cards.
Add keyboard features setting in the setup menu.
Fix system can't boot from its LS-120 drive if a CD-R is inserted in its CD-RW (or CD-ROM) drive.
Add L2 disable functionality for Cu-Mine.
Fix yellow exclaimation mark on the display card under Windows 98 ACPI mode when printer port is set to "Normal" and "3BCH" mode in setup menu.
Patch for SunDisk 3DP3B-10 flash d
1.06 fixed these things (it's the newest i believe)
Fix Windows 2000 cannot be installed if all PnP devices in Super I/O are disabled.
Support 566MHz and 850MHz CPU with clock ratio equal or greater than 8.5x.
Revise Coppermine Vcore limit for 128K cache Coppermine.
Fix Hardware Monitor false alarm of CPU vcore when using old celeron
Hope this helps