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Code(hex)
Name
4
Reserved
5
Blank video
6
Reserved
7
Init KBC
8
KB test
9
Reserved
A
Mouse Init
B
Onboard Audio init
C
Reserved
D
Reserved
E
CheckSum Check
F
Reserved
10
Auto detec EEPROM
11
Reserved
12
Cmos Check
13
Reserved
14
Chipset Default
load
15
Reserved
16
Clock Init
17
Reserved
18
Identify the CPU
19
Reserved
1A
Reserved
1B
Setup Interrupt
Vector Table
1C
Reserved
1D
Early PM Init
1E
Reserved
1F
Re-initial KB
20
Reserved
21
HPM init
22
Reserved
23
Test CMOS
Interface and
Battery Status
24
Reserved
25
Reserved
26
Reserved
27
KBC final Init
28
Reserved
29
Initialize Video
Interface
2A
Reserved
2B
Reserved
2C
Reserved
2D
Video memory test
2E
Reserved
Description
Reset Video controller
Keyboard controller init
Test the Keyboard
Initialized the mouse
Onboard audio controller initialize if
exist
Check the intergraty of the ROM,BIOS and
message
Check Flash type and copy flash
write/erase routines to 0F000h segments
Check Cmos Circuitry and reset CMOS
Program the chipset registers with CMOS
values
Init onboard clock generator
Check the CPU ID and init L1/L2 cache
Initialize first 120 interrupt
vectors with SPURIOUS_INT_HDLR and
initialize
INT 00h-1Fh according to INT_TBL
First step initialize if single CPU
onboard
Re-init KB
If support HPM, HPM get initialized here
Verifies CMOS is working correctly,
detects bad battery. If failed, load
CMOS defaults and load into chipset
Final Initial KBC and setup BIOS data
area
Read CMOS location 14h to find out type
of video in use.
Detect and Initialize Video Adapter.
Test video memory, write sign-on
message to screen.
Setup shadow RAM - Enable shadow
according to Setup.
i2
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