Boot Block Bios - American Megatrends Enterprise-III User Manual

Boot Block BIOS POST Checkpoint Codes
Code
02h Verify the Boot Block BIOS checksum and disable internal cache memory.
0Eh Make the CMOS RAM checksum bad and initialize the CMOS RAM status
registers.
10h Disable DMA Controllers 1 and 2. Disable Interrupt Controllers 1 and 2.
13h Initialize the chipset registers.
18h If the main BIOS is good, transfer control to the main BIOS.
1Bh Initialize the system timer.
1Dh Begin the refresh test.
20h Begin the 16 KB base memory test.
23h Initialize the interrupt vectors.
28h Determine the CPU clock frequency.
30h Program the system speed-dependent parameters according to the CPU
clock frequency.
40h Begin the memory test.
50h The memory test has completed.
65h Initialize the DMA controller.
67h Initialize the interrupt controller.
80h Initialize the I/O chipset, if any.
85h Enable the appropriate IRQs.
86h Enable the internal cache memory.
88h Initialize the floppy drives.
90h Indicate an error. The BIOS stops here if there is an error.
A0h Reading the floppy disk in drive A: to program the Flash EPROM.
E0h Configure the proper stack.
E3h Display a message to ask the user to insert the Boot Block Floppy Disk in
drive A:.
E4h Floppy read error.
E5h Begin the search for the S68P.ROM file in the floppy disk root directory.
E6h The S68P.ROM file not present in the floppy disk root directory.
E7h Begin reading the File Allocation Table.
E8h Begin reading S68P.ROM, sector by sector.
E9h S68P.ROM is not the proper size.
EFh Disable internal cache memory.
F0h Enable and reset flash memory.
F1h Detect the flash type if present.
F2h Flash memory not detected.
F3h Begin erasing flash blocks.
F4h Begin programming flash blocks.
FFh Flash programming successful and the system reboots, if possible.
Enterprise-III EISA VLB Motherboard User's Guide
Description
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