User manual

BIOS Setup
55
POST
Code
(Hex)
Name Description
33h
PDM_INIT
Initialize the Phoenix Dispatch Manager.
34h
CMOS_TEST
Clear CMOS diagnostic byte.
IF <CMOS battery is dead> THEN
Set “bad battery” flag in CMOS
IF <CMOS checksum is bad> THEN
Set “bad CMOS check” flag in CMOS
Checksum CMOS
ENDIF
ENDIF
36h
CHK_SHUTDOWN
Vector to proper shutdown routine (reset).
38h
SYS_SHADOW
Copy system BIOS ROM to shadow
RAM.
3Ah
CACHE_AUTO
Detect the amount of SRAM for the L2
cache. Set L2 cache controller
configuration registers to enable SRAM.
3Ch
ADV_CS_CONFIG
IF <CMOS is valid (checksum good and
battery good) THEN
Load DRAM controller configuration
registers with
values from CMOS fields.
ENDIF
3Dh
ADV_REG_CONFI
G
IF <CMOS is valid> THEN
Load ISA controller configuration
registers with
values from CMOS fields and load any
other
configuration registers with values from
CMOS
fields.
ENDIF
42h
VECTOR_INIT
Set interrupt vectors 0-77h to BIOS
general interrupt handler.
44h
SET_BIOS_INT
Set interrupt vectors 0-20h to correct
BIOS interrupt handlers.
45h
CORE_DEVICE_IN
IT
Initialize all motherboard devices.
46h
COPYRIGHT
Verify that the Phoenix BIOS copyright
message is correct.
47h
PCI_OP_INIT
Initialize PCI option ROM manager.
48h
CONFIG
Determine video type to be used and
store.