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Hard Disk(s) fail (08)
Keyboard is locked out - Unlock the key.
BIOS detect the keyboard is locked. P17 of keyboard controller is pulled low.
Keyboard error or no keyboard present.
Cannot initialize the keyboard. Make sure the keyboard is attached correctly and no keys are
being pressed during the boot.
Manufacturing POST loop.
System will repeat POST procedure infinitely while the P15 of keyboard controller is pull low.
This is also used for M/B burn in test.
BIOS ROM checksum error - System halted.
The checksum of ROM address F0000H-FFFFFH is bad.
Memory test fail.
BIOS reports the memory test fail if the onboard memory is tested error.
3-13 POST Codes
POST (hex)
CFh
C0h
C1h
C3h
C5h
0h1
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
0Ch
0Dh
0Eh
Sector Verify failed.
Test CMOS R/W functionality.
Early chipset initialization:
-Disable shadow RAM
-Disable L2 cache (socket 7 or below)
-Program basic chipset registers
Detect memory
-Auto-detection of DRAM size, type and ECC.
-Auto-detection of L2 cache (socket 7 or below)
Expand compressed BIOS code to DRAM
Call chipset hook to copy BIOS back to E000 & F000 shadow RAM.
Expand the Xgroup codes locating in physical address 1000:0
Reserved
Initial Superio_Early_Init switch.
Reserved
1. Blank out screen
2. Clear CMOS error flag
Reserved
1. Clear 8042 interface
2. Initialize 8042 self-test
1. Test special keyboard controller for Winbond 977 series Super I/O chips.
2. Enable keyboard interface.
Reserved
1. Disable PS/2 mouse interface (optional).
2. Auto detect ports for keyboard & mouse followed by a port & interface
swap (optional).
3. Reset keyboard for Winbond 977 series Super I/O chips.
Reserved
Reserved
Reserved
Test F000h segment shadow to see whether it is R/W-able or not. If test
Description
37
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