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6C
Reserved
6D
Reserved
6E
Reserved
6F
Reserved
70
Setup Init
71
Setup Cache
Controller
72
Install FDD
73
Install HDD
74
Detect & Initialize
Math Coprocessor
75
HDD Check for Write
protection
76
Reserved
77
Display POST error
78
CMOS and Option ROM
Init
79
Reserved
7A
Reserved
7B
Reserved
7C
Reserved
7D
Boot Medium
detection
7E
Final Init
7F
Special KBC patch
80
Boot Attempt
FF
Boot
and turn on all necessary CPU features
Display PnP logo and PnP early init
Setup virus protect according to
Setup. If required, will auto load
Awdflash.exe in POST
Initializing onboard superIO
Display setup message and enable setup
functions Detect if mouse is present,
initialize mouse, install interrupt
vectors. Special treatment to PS2
Mouse port
ACPI sub-system initializing
Initialize cache controller.
Enter setup check and auto-
configuration check up
Initialize floppy disk drive
controller and any drives.
Install FDD and setup BIOS data area
parameters
Initialize hard drive controller and
any drives.
IDE device detection and install
Initialize any serial and parallel
ports (also game port).
Initialize math coprocessor.
HDD check out
Check POST error and display them
and ask for user intervention
Ask password security (optional).
Write all CMOS values back to RAM and
clear screen.
Enable parity checker
Enable NMI, Enable cache before boot.
Initialize any option ROMs present
from C8000h to EFFFFh.
NOTE: When FSCAN option is enabled,
ROMs initialize from C8000h to
F7FFFh.
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.
65
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