If it has AWARD or AMI BIOS - you have a good chance that it can be successfully patched. Otherwise - sorry, you are out of luck, because AFAIK there were NO updates for MediaGX motherboards.
Just becouse of curiousity -what is the motherboard manufacturer / bios version (ID)right now ?
Award Bios V4.51PG
5520 Bios
09/28/1998-Gxm-Cx5520-2A433Q19C-00
Seems to be QDI P5C5520GXM... But www.qdigrp.com don't know this MB.
According to main sources ,yes, its QDI, however many (and will stress on Many) chineese websites identify it as HOOVER (Lenovo), i did some research but did not find any useful info.
Is it possible to have a look on the picture of the motherboard and/or may be there are some other numbers/words printed on board/pcb or anywhere else?
В соответствии с основными источниками,да QDI, а вот китайцы говорят ето HOOVER(LENOVO)
5520 Bios
09/28/1998-Gxm-Cx5520-2A433Q19C-00
Is it possible to have a look on the picture of the motherboard and/or may be there are some other numbers/words printed on board/pcb or anywhere else?
В соответствии с основными источниками,да QDI, а вот китайцы говорят ето HOOVER(LENOVO)
http://translate.google.com/translate?hl=en&sl=zh-CN&u=http://www.moon-soft.com/program/bbs/readelite143889.htm&sa=X&oi=translate&resnum=7&ct=result&prev=/search?q=Gxm-Cx5520&hl=en