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3
Programming the 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 S742P.ROM file in drive A:.
3
Before DOS boots, press and hold down the <Ctrl> and
<Home> keys to reprogram the Flash EPROM-based AMIBIOS.
The bootblock code immediately reads the A: drive, looking for
the new BIOS information.
4
When the flash ROM has successfully been programmed, the
computer will reboot.
Bootblock BIOS Actions When you reprogram from system boot,
Chapter 3 Programming the Flash ROM
All versions of the Apollo II 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.
the bootblock BIOS code:
Reads S742P.ROM from the root directory of the
floppy disk in drive A:.
Erases the Flash EPROM.
Programs the Flash EPROM with the data read
from the floppy disk in drive A:.
Generates a CPU reset, rebooting the computer.
The bootblock part of the Flash EPROM is not
programmed. Should you inadvertently open the
disk drive door or turn power off to the computer
while programming the Flash EPROM, the
bootblock will be unaffected. Simply turn power
back on and begin the Flash ROM programming
process again.
Action
Cont'd
61
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