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Checkpoint Description
08 Initializes the CPU. The BAT test is being done on KBC.Program the keyboard
controller command byte is being done after Auto detection of KB/MS using AMI
KB
-
5.
C0 Early CPU Init Start -- Disable Cache – Init Local APIC
C1 Set up boot strap processor Information
C2 Set up boot strap processor for POST
C5 Enumerate and set up application processors
C6 Re-enable cache for boot strap processor
C7 Early CPU Init Exit
0A Initializes the 8042 compatible Key Board Controller.
0B Detects the presence of PS/2 mouse.
0C Detects the presence of Keyboard in KBC port.
0E Testing and initialization of different Input Devices. Also, update the
Kernel Variables.
Traps the INT09h vector, so that the POST INT09h handler gets control for IRQ1.
Uncompress all available language, BIOS logo, and Silent logo modules.
13 Early POST initialization of chipset registers.
20 Relocate System Management Interrupt vector for all CPU in the system.
24 Uncompress and initialize any platform specific BIOS modules. GPNV is
2A Initializes different devices through DIM.
2C Initializes different devices. Detects and initializes the video adapter installed in the
system that had optional ROMs.
2E Initializes all the output devices.
31
Allocate memory for ADM module and uncompress it. Give control to ADM module
for initialization. Initialize language and font modules for ADM. Activate ADM
module.
33 Initializes the silent boot module. Set the window for displaying text information.
37 Displaying sign-on message, CPU information, setup key message, and any
OEM specific information.
38 Initializes different devices through DIM. USB controllers are initialized at this point.