Abit AW8 user manual Appendix H. Post Code Definition, Award Post Code Definitions, Description

POST Code Definition H-1

Appendix H. POST Code Definition

AWARD POST Code Definitions

POST		Description
(hex)
CF		Test CMOS R/W functionality
		Early chipset initialization:
C0			-Disable shadow RAM
			-Disable L2 cache (socket 7 or below)
			-Program basic chipset registers
C1		Detect memory
			-Auto-detection of DRAM size, type and ECC
			-Auto-detection of L2 cache (socket 7 or below)
C3		Expand compressed BIOS code to DRAM
C5		Call chipset hook to copy BIOS back to E000 & F000 shadow RAM
01		Expand the Xgroup codes locating in physical address 1000:0
03		Initial Superio_Early_Init switch
05	1.		Blank out screen
	2.		Clear CMOS error flag
07	1.		Clear 8042 interface
	2.		Initialize 8042 self-test
08	1.		Test special keyboard controller for Winbond 977 series Super I/O chips
	2.		Enable keyboard interface
0A	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
0E		Test F000h segment shadow to see whether it is R/W-able or not. If test fails, keep
		beeping the speaker
10		Auto detect flash type to load appropriate flash R/W codes into the run time area in F000
		for ESCD & DMI support
12		Use walking 1’s algorithm to check out interface in CMOS circuitry. Also set real-time
		clock power status, and then check for override
14		Program chipset default values into chipset. Chipset default values are MODBINable by
		OEM customers
16		Initial onboard clock generator if Early_Init_Onboard_Generator is defined. See also
		POST 26.
18		Detect CPU information including brand, SMI type (Cyrix or Intel) and CPU level (586
		or 686)
1B		Initial interrupts vector table. If no special specified, all H/W interrupts are directed to
		SPURIOUS_INT_HDLR & S/W interrupts to SPURIOUS_soft_HDLR.
1D		Initial EARLY_PM_INIT switch

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