D-2

 

Appendix D

 

 

 

 

 

 

 

25

Early PCI Initialization:

 

 

 

-Enumerate PCI bus number.

 

 

 

-Assign memory & I/O resource

 

 

 

-Search for a valid VGA device & VGA BIOS, and put it into C000:0

 

26

1.

If Early_Init_Onboard_Generator is not defined Onboard clock generator initialization.

 

 

 

Disable respective clock resource to empty PCI & DIMM slots.

 

 

2.

Init onboard PWM

 

 

3.

Init onboard H/W monitor devices

 

27

Initialize INT 09 buffer

 

29

1.

Program CPU internal MTRR (P6 & PII) for 0-640K memory address.

 

 

2.

Initialize the APIC for Pentium class CPU.

 

 

3.

Program early chipset according to CMOS setup. Example: onboard IDE controller.

 

 

4.

Measure CPU speed.

 

2B

Invoke Video BIOS

 

2D

1.

Initialize double-byte language font (Optional)

 

 

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 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

 

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

 

2.

Initialize Init_Onbaord_AUDIO

 

 

 

60

Okay to enter Setup utility; i.e. not until this POST stage can users enter the CMOS setup

 

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

AN7