IBM EP-8KTA specifications Appendix B, For Bios 6.0 Code

EP-8KTA Appendix

Appendix B

B-1 POST CODES

For BIOS 6.0 Code

POST (hex)	DESCRIPTION
CFh	Test CMOS R/W functionality.
C0h	Early chipset initialization:
	- Disable shadow RAM
	- Disable L2 cache (socket 7 or below)
	- Program basic chipset registers
C1h	Detect memory
	- Auto-detection of DRAM size, type and ECC.
	- Auto-detection of L2 cache (socket 7 or below)
C3h	Expand compressed BIOS code to DRAM
C5h	Call chipset hook to copy BIOS back to E000 & F000
	shadow RAM.
0h1	Expand the Xgroup codes locating in physical address
	1000:0
02h	Reserved
03h	Initial Superio_Early_Init switch.
04h	Reserved
05h	1. Blank out screen
	2. Clear CMOS error flag
06h	Reserved
07h	1. Clear 8042 interface
	2. Initialize 8042 self-test
08h	1. Test special keyboard controller for Winbond 977
	series Super I/O chips.
	2. Enable keyboard interface.
09h	Reserved
0Ah	1. Disable PS/2 mouse interface (optional).
	2. Auto detect ports for keyboard & mouse followed by
	a port & interface swap (optional).

B-1