Post Code Checkpoints

		System Resources
POST Code Checkpoints
	Checkpoint	Description
	03	Disable NMI, Parity, video for EGA, and DMA controllers. Initialize BIOS,
		POST, Runtime data area. Also initialize BIOS modules on POST entry
		and GPNV area. Initialized CMOS as mentioned in the Kernel Variable
		"wCMOSFlags."
	04	Check CMOS diagnostic byte to determine if battery power is OK and
		CMOS checksum is OK. Verify CMOS checksum manually by reading
		storage area. If the CMOS checksum is bad, update CMOS with power- on
		default values and clear passwords. Initialize status register A.
		Initializes data variables that are based on CMOS setup questions.
		Initializes both the 8259 compatible PICs in the system
	05	Initializes the interrupt controlling hardware (generally PIC) and interrupt
		vector table.
	06	Do R/W test to CH-2 count reg. Initialize CH-0 as system timer.Install the
		POSTINT1Ch handler . Enable IRQ-0 in PIC for system timer interrupt.
		Traps INT1Ch vector to "POSTINT1ChHandlerBlock."
	07	Fixes CPU POST interface calling pointer.
	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
		initialized at this checkpoint.
	2A	Initializes different devices through DIM.
		See DIM Code Checkpoints section of document for more information.
	2C	Initializes different devices. Detects and initializes the video adapter
		installed in the system that have 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. See DIM Code Checkpoints
		section of document for more information. USB controllers are initialized
		at this point.
		4-5