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Code
AAh
ACh
AEh
B0h
B2h
B4h
B5h
B6h
B9h
BAh
BBh
BCh
BDh
BEh
BFh
C0h
C1h
C2h
C3h
C4h
C5h
C6h
C7h
C8h
C9h
D2h
E0h
E1h
E2h
E3h
E4h
E5h
E6h
E7h
E8h
E9h
EAh
EBh
ECh
EDh
EEh
EFh
Chapter 1
Beeps
1
POST Routine Description
Scan for F2 key stroke
Enter SETUP
Clear Boot flag
Check for errors
POST done—prepare to boot operating
system
One short beep before boot
Terminate QuietBoot (optional)
Check password (optional)
Prepare Boot
Initialize DMI parameters
Initialize PnP Option ROMs
Clear parity checkers
Display MultiBoot menu
Clear screen (optional)
Check virus and backup reminders
Try to boot with INT 19
Initialize POST Error Manager (PEM)
Initialize error logging
Initialize error display function
Initialize system error handler
PnPnd dual CMOS (optional)
Initialize notebook docking (optional)
Initialize notebook docking late
Force check (optional)
Extended checksum (optional)
Unknown interrupt
Initialize the chipset
Initialize the bridge
Initialize the CPU
Initialize the system timer
Initialize system I/O
Check force recovery boot
Checksum BIOS ROM
Go to BIOS
Set Huge Segment
Initialize Multi Processor
Initialize OEM special code
Initialize PIC and DMA
Initialize Memory type
Initialize Memory size
Shadow Boot Block
System memory test
73
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