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Code(hex)
Name
18
InitCPU
19
Reserved
1A
Reserved
1B
Setup Interrupt
1C
CMOS Battery Check
1D
Early PM Early PM
initialization
1E
Reserved
1F
Re-initial KB
20
Reserved
21
HPM init
22
Reserved
23
Program chipset
24
Init PNP
25
Shadow VBIOS
26
Clock
27
Setup BDA
28
Reserved
29
CPU Speed detect
2A
Reserved
2B
Init video
2C
Reserved
2D
Video memory test
2E
Reserved
2F
Reserved
30
Reserved
31
Reserved
32
Reserved
33
Early keyboard reset
34
Reserved
35
Test DMA Controller
0
36
Reserved
37
Test DMA Controller
On-board LED Codes
Description
CPU ID and initialize L1/L2 cache
Initialize first 120 interrupt vectors Vector Table with
SPURIOUS_INT_HDLR and initialize INT 00h-1Fh
according to INT_TBL
Test CMOS and check Battery Fail
Load keyboard matrix
Init Heuristic Power Management (HPM)
Early Programming of chipset registers
Init PNP
Shadow system/video BIOS
Gen Init onboard clock generator and sensor
Setup BIOS DATA AREA (BDA)
Chipset programming and CPU Speed detect
Initialize Video
Test Video Memory and display Logos
Early Keyboard Reset
Test DMA channel 0
Test DMA channel 1
113
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