User manual

BIOS Setup
53
POST
Code
(Hex)
Name Description
08h
CS_INIT
Set DRAM controller registers to values
that are needed for DRAM discovery and
testing.
0Ah
CPU_INIT
Set CPU configuration registers.
0Bh
CPU_CACHE_ON
Turns on the CPU cache.
0Ch
CACHE_INIT
Set L2 cache controller registers to
values needed for SRAM discovery and
testing.
0Eh
IO_INIT
IF <onboard super I/O exists> THEN
Turn Off LPT and COM ports in super
I/O.
Set I/O controller registers to default
values.
ENDIF
0Fh
FDISK_INIT
IF <secondary IDE controllers exists>
THEN
Set secondary IDE controller
configuration registers
to default values.
ENDIF
10h
PM_INIT
IF <power management enabled> THEN
Set the power management
configuration registers
to default values.
ENDIF
11h
REG_INIT
Set Cx5520 configuration registers to
default values.
Set any other configuration registers to
default values.
12h
RESTORE_CR0
Return to real mode.
13h
PCI_BM_RESET
Early reset of PCI devices required to
disable bus masters. Assumes the
presence of a stack and running from
decompressed shadow memory.
14h
8742_INIT
Verify 8742 (keyboard controller) is
responding. Improper connections/timing
to the 8742. Send self test command to
8742.
16h
CHECKSUM
Checksum the system BIOS ROM
IF <checksum is incorrect> THEN
Halt.
ENDIF