Chapter 3 Programming the Flash ROM
75
3
Programming Flash ROM
All versions of the MegaPro 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
S745P.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
