HP KAYAK XU800 verified, memory test, Starting Memory sizing, POST Routine Description, the system BIOS checksum, Bootblock Recovery Codes, go to checkpoint code E0h

6 Tests and Error Messages

Order in Which POST Tests Are Performed

A Check Point Code allows you to follow the POST schedule on the MaxiLife LCD panel. To achieve this, you first need to select the “Boot Step” option in the “Service” menu of MaxiLife.

The following table lists the POST checkpoint codes written at the start of each test and listed in order of execution.

Checkpoint	POST Routine Description
Code	(A Check Point Code is NOT an error code or error number)
	Uncompressed Initialization Codes
D0h	NMI is disabled. Power on delay is starting. Next, the initialization code checksum will be
	verified.
D1h	Initializing the DMA controller, performing the keyboard controller BAT test, starting
	memory refresh, and entering 4 GB flat mode.
D3h	Starting Memory sizing.
D4h	Returning to real mode. Executing any patches and setting the stack.
D5h	Passing control to the uncompressed code shadow RAM at E000:0000h. The initialization
	code is copied to segment 0 and control will be transferred to segment 0.
D6h	Control is segment 0. Next, checking if <Ctrl><Home> was pressed and verifying
	the system BIOS checksum.
	If either <Ctrl><Home> was pressed or the system BIOS checksum is bad, next will
	go to checkpoint code E0h.
	Otherwise, going to checkpoint code D7h.
D7h	Passing control to the interface module.
D8h	Main system BIOS runtime code will be decompressed.
D9h	Passing control to the main system BIOS in shadow RAM.
	Bootblock Recovery Codes
E0h	Onboard floppy disk driver controller is initialized. Next, beginning the base 512 KB
	memory test.
E1h	Initializing the interrupt vector table.
E2h	Initializing the DMA and Interrupt controllers.
E6h	Enabling the floppy disk drive controller, Timer IRQs and internal cache memory.

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