User`s manual
Motherboard Manual
50
6.5 BIOS POST CODE LIST
CODE
Name Description
C0 Turn Off Chipset and CPU test Read/Write/Verify all CPU registers
C1 Memory Presence First block memory detect,presence test
C2 Early Memory Initial OEM Specific- Board Initialization
C3 Extend Memory DRAM select OEM Specific- Turn on extended memory
C4 Special Display Handling OEM Specific- Display/Video Switch
C5 Early Shadow Early sha dow enable for fast boot
C6 Cache presence test External cache size detection
CF CMOS Check CMOS checkup
B0 Spurious If interr upt occurs i n pr otec ted mode
B1 Unclaimed NMI
If unmasked NMI occurs
,
dis
p
la
y
Press F1 to disable NMI
,
F2
reboot.
BF Program C hip Set To pr ogram c hipset fr om de faults v alues
E1-EF Setup Pa ges E1- Page 1, E2 - Page 2, etc.
1 Build BIOS Engine Build Award Decompression Bios Engine
2 Setup Bios item Setup the Bios item segment and Read CMOS data into stack
3 Build PMM Node Initialize Post Memory Manager
5 Blank video screen Reset Video controller
7 Initial keyboard Initialize the keyboard controller
8 Test Keyboar d Test the Key board
A Initial mouse Initialize the mouse
E
Checksum the BIOS a nd
message
Check the intergraty of the ROM,BIOS and message
10 Auto detec Flash
Check Flash type a nd copy flash write/erase routines to
0F00 0h segments
12 Check CMOS Check CMOS circuitry
14 Chipset Default load Programs the chipset registers with default values
18 Identify the CPU Check the CPU ID and init Cache controller
1B Setup Interrupt Vector Table Initialize interrupt vectors table
1C Check CMOS Check normal CMOS checksum and battery
1D Record MP system Record MP system
21 initial HPM If support HPM, HPM get initialized here
23 Programs chipset Programs the chipset registers
24 PNP System Resource PNP System Resource
25 Shadowing system Shadowing system and video BIOS to speedup booting
26 Initialize Device program t he Peripheral Device and i nit Generator,Sensor
27
Initial KBC and setup BIOS
data
Final Initialize the ke
y
board controller and set u
p
BIOS area
data
29 Set video i nterface set VGA to special state Before initial
2B initial Video device initial Video device
2D Video memory test Test the vi deo mem ory
2F show message show Summary message
33 PS2 Mouse setup Setup PS2 Mouse and reset KB