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Chapter 3 Programming the Flash ROM 79
3 Programming Flash ROM
All versions of the MegaRUM PCI motherboard use Flash EPROM to store the
system BIOS. The advantage of Flash EPROM is the EPROM chip does not
have to be replaced to update the BIOS. The end user can actually reprogram
the BIOS, using a ROM file supplied by American Megatrends.
Programming the Flash EPROM
Step Action
1 Turn power off. Make sure the computer has a working speaker.
2
Insert the floppy disk with the
S758P.ROM file
in drive A:.
3 Press and hold the <Ctrl> and <Home> keys down while turning the power on.
Continue to hold the <Ctrl> and <Home> keys down until the access light on the
floppy drive comes on. It may take 10 seconds or more before this light turns on.
4 Release the <Ctrl> and <Home> keys. AMIBIOS issues a series of beep codes that
indicate that the system BIOS ROM file is being updated.
5 When the flash ROM has successfully been programmed, the computer will reboot.
6 When the computer reboots, check the BIOS Release text at the bottom of the first
boot screen to make sure that the correct BIOS has been used.
7 The error message
NVRAM checksum bad, NVRAM cleared
will appear during the first boot after a successful BIOS ROM update. This
message indicates that the NVRAM area in the system BIOS has been cleared.
AMIBIOS will reconstruct the NVRAM area before the computer boots
completely, so you can safely ignore this message.
8 Load the optional default and save.
Cont’d