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Apollo IV PCI Pentium ISA Motherboard User’s Guide
66
Programming the Flash ROM, Continued
S772P.ROM S772P.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 IV ISA motherboard must be updated.
S772P.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 S772P.ROM.
Sequence of Operation The sequence of operation and expected behavior of the bootblock
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
S772P.ROM on the
floppy disk.
S772P.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.