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POST
Code
0xB7
Initialize ACPI BIOS.
0x9B
Enable CPU management (Geyserville I)
0xBD
Display Boot First menu if MultiBoot is installed and hotkey
pressed.
0xBF
Check virus and backup reminders.
0x97
Create pointer to MP table in Extended BDA.
0x99
Check support status for Self-Monitoring Analysis Reporting
Technology (disk-failure warning).
0xB1
Unload ROM Pilot
0xDD
Perform remote flash if requested
0xC7
If UCR redirection is installed, remove display manager and
unhook INT10
0XDF
Shutdown the PXE UNDI code
0xB3
Store enhanced CMOS values in non-volatile area
0xE4
Last Legacy BIOS Task before hand off to UEFI/DXE
0xB9
Clear all screen graphics before booting.
0xC0
INT19 entry for legacy boot
0xEF
Invalid AP #
0xEF
Non-Yohna and non-Modem class CPU found for SDXE
(getTSCFreq)
0xEE
AP cannot synch BSP in SDXE (syncWithBSP)
0xEE
BSP cannot synch w/ AP in SDXE (syncWithAP)
146
Function
Phase
Component
LBT
Core
LBT
Core
LBT
Core
LBT
Core
LBT
Core
LBT
Core
LBT
Core
LBT
Core
LBT
Core
LBT
Core
LBT
Core
LBT
Core
bootLegacy
Core
bootLegacy
Core
SDXE
Core
SDXE
Core
SDXE
Core
SDXE
Core
Chapter 4
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