Early PCI Initialization | Intel AW8D specification

	Early PCI Initialization:
25		-Enumerate PCI bus number.
25		-Assign memory & I/O resource
		-Assign memory & I/O resource
		-Search for a valid VGA device & VGA BIOS, and put it into C000:0
	1.	If Early_Init_Onboard_Generator is not defined Onboard clock generator initialization.
26		Disable respective clock resource to empty PCI & DIMM slots.
26	2.	Init onboard PWM
	2.	Init onboard PWM
	3.	Init onboard H/W monitor devices
27	Initialize INT 09 buffer
	1.	Program CPU internal MTRR (P6 & PII) for 0-640K memory address.
29	2.	Initialize the APIC for Pentium class CPU.
29	3.	Program early chipset according to CMOS setup. Example: onboard IDE controller.
	3.
	4.	Measure CPU speed.
2B	Invoke Video BIOS
	1.	Initialize double-byte language font (Optional)
2D	2.	Put information on screen display, including Award title, CPU type, CPU speed, full screen
		logo.
33	Reset keyboard if Early_Reset_KB is defined e.g. Winbond 977 series Super I/O chips. See
33	also POST 63.
	also POST 63.
35	Test DMA Channel 0
37	Test DMA Channel 1.
39	Test DMA page registers.
3C	Test 8254
3E	Test 8259 interrupt mask bits for channel 1
40	Test 8259 interrupt mask bits for channel 2
43	Test 8259 functionality
47	Initialize EISA slot
49	1.	Calculate total memory by testing the last double word of each 64K page
49	2.	Program writes allocation for AMD K5 CPU
	2.	Program writes allocation for AMD K5 CPU
	1.	Program MTRR of M1 CPU
	2.	Initialize L2 cache for P6 class CPU & program CPU with proper cacheable range
4E	3.	Initialize the APIC for P6 class CPU
	4.	On MP platform, adjust the cacheable range to smaller one in case the cacheable ranges
		between each CPU are not identical
50	Initialize USB
52	Test all memory (clear all extended memory to 0)
53	Clear password according to H/W jumper (Optional)
55	Display number of processors (multi-processor platform)
	Display PnP logo
57	Early ISA PnP initialization
		-Assign CSN to every ISA PnP device
59	Initialize the combined Trend Anti-Virus code
5B	(Optional Feature) Show message for entering AWDFLASH.EXE from FDD (optional)
5D	1.	Initialize Init_Onboard_Super_IO
5D	2.	Initialize Init_Onbaord_AUDIO
	2.	Initialize Init_Onbaord_AUDIO
60	Okay to enter Setup utility; i.e. not until this POST stage can users enter the CMOS setup
60	utility
	utility
63	Reset keyboard if Early_Reset_KB is not defined
65	Initialize PS/2 Mouse
67	Prepare memory size information for function call: INT 15h ax=E820h
69	Turn on L2 cache

5-2

Early PCI Initialization:

Initialize double-byte language font (Optional)

AW8D