Bios update for atc 5220

Question

i've computer
motherboard atc5220 mainboard a-trend mvp3-586b-smc669
chipset via vt82c596mvp [appolo vp3]
processor amd k6-2 model 8 @501Mhz

i already instal it with windows 2000 but it cant upgrade to windows 2000 service pack 2 or higher..
is anyone can help me with update bios and the download link for the bios?
and tell me the other way beside update the bios...
tq