The Oasis users need not flash BIOS since each BIOS comes preinstalled for the right type of CPU.
Also, each BIOS corresponds for particular version of the CPU installed so that it is not possible to "upgrade" an older Oasis with a "newer" BIOS since there is only one BIOS version for each generation of Oasis.

BIOS files can be found at ftp://ftp.fic.com.tw/bios/system/oasis/

FIC Technical Suport