Bootblock Code Checkpoint Codes - American Megatrends Atlas III PCI User Manual

Bootblock Code Checkpoint Codes

Code
E0h
E1h
E2h
E3h
E4h
E5h
E6h
E7h
E8h
E9h
EAh
EDh
EEh
EFh
F0h
F1h
F2h
F3h
F4h
F5h
FBh
FCh
FDh
FEh
FFh
68 Atlas PCI-III PCI Pentium ISA Motherboard User's Guide
Description
Verify the bootblock BIOS checksum. Disable the internal
cache, DMA, and interrupt controllers. Initialize the
system timer. Start memory refresh.
Initialize the chipset registers. Set the BIOS size to 128K.
Make the 512 KB base memory available.
Test the base 64 KB of system memory. Send the BAT
command to the keyboard controller. Make sure that
<Ctrl> <Home> was pressed. Verify the main system
BIOS checksum.
The main system BIOS is good. Transfer control to the
main system BIOS.
Start the memory test.
The memory test is over. Initialize the interrupt vector
table.
Initialize the DMA and interrupt controllers.
Determine the CPU internal clock frequency.
Initialize the I/O chipset, if any.
Program the CPU clock-dependent chip set parameters.
Enable the timer and the floppy diskette interrupt. Enable
the internal cache. Copy the bootblock BIOS and pass
control to the bootblock BIOS in the 0000h segment.
Initialize the floppy drive.
Look for a diskette in drive A:. Read the first sector of the
diskette.
Floppy read error.
Search for AMIBOOT.ROM in the root directory of the
floppy diskette in drive A:.
The AMIBOOT.ROM file is not in the root directory.
Read the FAT. Analyze the FAT to find the clusters
occupied by the AMIBOOT.ROM.
Start reading the AMIBOOT.ROM file, cluster by cluster.
The AMIBOOT.ROM file is not the correct size.
Disable the internal cache. Raise the Vpp. Enable Flash
write and reset the Flash ROM.
Detect the flash type.
Start erasing flash blocks.
Program the Flash ROM in the E0000-EFFFFh region.
Start programming Flash at F0000-FFFFF region.
Flash programming is successful. The computer reboots.