Introduction
1230B0026701
1-11
Checkpoint Description
C7
Early CPU Init Exit
0A
Initialize the 8042 compatible Key Board Controller.
0B
Detect the presence of PS/2 mouse.
0C
Detect the presence of Keyboard in KBC port.
0E
Testing and initialization of different Input Devices. Also, update the Kernel
Variables.
Trap 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.
24
Uncompress and initialize any platform specific BIOS modules.
30
Initialize System Management Interrupt.
2A
Initialize different devices through DIM.
See DIM Code Checkpoints section of document for more information.
2C
Initialize different devices. Detects and initializes the video adapter installed in the
system that has optional ROMs.
2E
Initialize 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
Initialize 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
Initialize different devices through DIM.
39
Initialize DMAC-1 & DMAC-2.
3A
Initialize RTC date/time.
3B
Test for total memory installed in the system. Also, Check for DEL or ESC keys to
limit memory test. Display total memory in the system.
3C
Mid POST initialization of chipset registers.
40
Detect different devices (Parallel ports, serial ports, and coprocessor in CPU, etc.)
successfully installed in the system and update the BDA, EBDA, etc.
50
Programming the memory hole or any kind of implementation that needs an
adjustment in system RAM size if needed.
