Soyo has posted a bios for the 7IWM/L.
file name: 7wmv4bb2.binDownload
checksum: 0EEA
release date: 06/29/2000
BIOS revision: 7IWM/L V1.0_4BB2
Changes: Correct issue Celeron 2 CPU display Pentium III. Fix multiplier fail when it over 8.