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3
Programming Flash ROM
Programming the Flash EPROM
Step
1
Turn power off. Make sure the computer has a working speaker.
2
Insert the floppy disk with the S774P.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.
Since MegaRUM II uses a 2 megabit BIOS, the flashing process may
take up to 3 minutes.
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.
All versions of the MegaRUM II 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.
Action
Chapter 3 Programming the Flash ROM
Cont'd
71
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