AMD SB750 First step initialize if single CPU onboard, Final Initial KBC and setup BIOS data area

Models: SB750 790GX

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Page 57
Image 57
First step initialize if single CPU onboard

 

B

Onboard Audio init

Onboard audio controller initialize if

 

 

 

exist

 

C

Reserved

 

 

 

 

D

Reserved

 

 

 

 

E

CheckSum Check

Check the intergraty of the ROM,BIOS and

 

 

 

 

 

message

 

F

Reserved

 

 

 

 

10

Auto detec EEPROM

Check Flash type and copy flash

 

 

 

 

 

write/erase routines to 0F000h segments

 

11

Reserved

 

 

 

 

12

Cmos Check

Check Cmos Circuitry and reset CMOS

 

 

 

13

Reserved

 

 

 

 

14

Chipset Default

Program the chipset registers with CMOS

 

 

 

 

load

values

 

15

Reserved

 

 

 

 

16

Clock Init

Init onboard clock generator

 

 

 

17

Reserved

 

 

 

 

18

Identify the CPU

Check the CPU ID and init L1/L2 cache

 

 

 

19

Reserved

 

 

 

 

1A

Reserved

 

 

 

 

1B

Setup Interrupt

Initialize first 120 interrupt

 

 

 

 

Vector Table

vectors with SPURIOUS_INT_HDLR and

 

 

 

initialize

 

 

 

INT 00h-1Fh according to INT_TBL

 

1C

Reserved

 

 

 

 

1D

Early PM Init

First step initialize if single CPU onboard

 

 

 

1E

Reserved

 

 

 

 

1F

Re-initial KB

Re-init KB

 

 

 

20

Reserved

 

 

 

 

21

HPM init

If support HPM, HPM get initialized here

 

 

 

22

Reserved

 

 

 

 

23

Test CMOS Interface

Verifies CMOS is working correctly,

 

 

 

 

and Battery Status

detects bad battery. If failed, load CMOS

 

 

 

defaults and load into chipset

 

24

Reserved

 

 

 

 

25

Reserved

 

 

 

 

26

Reserved

 

 

 

 

27

KBC final Init

Final Initial KBC and setup BIOS data area

 

 

 

28

Reserved

 

 

 

 

29

Initialize Video

Read CMOS location 14h to find out type of

 

 

 

 

Interface

video in use.

 

 

 

Detect and Initialize Video Adapter.

 

2A

Reserved

 

 

 

 

2B

Reserved

 

 

 

 

2C

Reserved

 

 

 

 

2D

Video memory test

Test video memory, write sign-on

 

 

 

 

 

message to screen.

 

2E

Reserved

Setup shadow RAM - Enable shadow

 

 

 

 

 

according to Setup.

 

2F

Reserved

 

 

 

 

30

Reserved

 

 

 

 

31

Reserved

 

 

 

 

32

Reserved

 

 

 

 

33

PS2 Mouse setup

Setup PS2 Mouse and reset KB

 

 

 

34

Reserved

 

 

 

 

35

Test DMA Controller

Test DMA channel 0

 

 

 

 

0

 

 

 

 

36

Reserved

 

 

 

 

37

Test DMA Controller

Test DMA channel 1

 

 

 

 

1

 

 

 

 

38

Reserved

 

 

 

 

39

Test DMA Page

Test DMA Page Registers.

 

 

 

 

Registers

 

 

 

 

3A

Reserved

 

 

 

 

3B

Reserved

 

 

 

 

 

 

 

 

 

 

 

 

52

 

 

Page 57
Image 57
AMD SB750, 790GX user manual First step initialize if single CPU onboard, Final Initial KBC and setup BIOS data area