MSI AM-690E manual MS-9826 Mainboard Post Code Checkpoints, Checkpoint Description

MS-9826 Mainboard

Post Code Checkpoints

The POST code checkpoints are the largest set of checkpoints during the BIOS preboot process. The following table describes the type of checkpoints that may occur during the POST portion of the BIOS:

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
	“Wcomsflags”.
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”.
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.
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.
24	Uncompress and initialize any platform specific BIOS modules.
30	Initialize System Management Interrupt.
2A	Initializes different devices through DIM.
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 test
	information.
37	Displaying sign-on message, CPU information, setup key message, and
	any OEM specific information.

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