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88
Reserved
89
Reserved
8A
Reserved
8B
Reserved
8C
Reserved
8D
Reserved
8E
Reserved
8F
Reserved
90
Reserved
91
Reserved
92
Reserved
93
Boot Medium
detection
94
Final Init
95
Special KBC patch
96
Boot Attempt
FF
Boot
Quick POST Codes
Code(hex)
Name
65
Init onboard device
Code(hex)
Name
66
Early System setup
67
KBC and CMOS Init
68
Video Init
69
8259 Init
6A
Memory test
6B
CPU Detect and IO
init
Read and store boot partition head and
cylinders values in RAM
Final init for last micro details
before boot
Set system speed for boot
Setup NumLock status according to
Setup
Set low stack
Boot via INT 19h.
Description
Early Initialized the super IO
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
Description
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.
Init 8259 channel 1 and mask IRQ 9
Quick Memory Test
Detect CPU speed and display
CPU vendor specific version string
64
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