American Megatrends Apollo, User Manual

Page: 82 / 88

76 Apollo Motherboard User’s Guide
Programming the Flash ROM,
Continued
S728P.ROM S728P.ROM resides on a floppy disk and contains the updated main BIOS code. American Megatrends will
provide this file when the AMIBIOS for the Apollo Pentium PCI ISA motherboard must be updated.
S728P.ROM must be present in the root directory of the floppy disk before the onboard Flash EPROM can
be reprogrammed. The file that has the main BIOS code must be named S728P.ROM.
Sequence of Operation The sequence of operation and expected behavior of the boot block BIOS code is:
Step Expected behavior
1 Look for floppy
disk. The system beeps one time before the BIOS
attempts to read from floppy drive A:.
2 Look for
S728P.ROM on the
floppy disk. S728P.ROM must be in the root directory of
the floppy disk in drive A:. There is no beep if
successful.
3 Read the floppy
disk. The floppy disk is read. There is no beep if
this step is successful.
4 Check for BIOS file
size. The BIOS file size is checked. There is no
beep if this step is successful.
5 Check for Flash
EPROM. The BIOS looks for an Intel i28F001BX-T
Flash EPROM. It does not beep if this step is
successful.
6 Erase the Flash
EPROM. Two beeps sound when the BIOS begins
erasing the Flash EPROM.
7 Program the Flash
EPROM. Three beeps sound when the AMIFlash Code
begins reprogramming the Flash EPROM.
8 Continue
programming the
Flash EPROM. Four beeps sound when reprogramming has
been successfully completed.
9 AMIFlash does a
reset. A CPU reset is generated to reboot the
computer.
Cont’d