Acer G301 manual AMIBIOS POST Checkpoint Codes, Uncompressed Initialization Codes

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AMIBIOS POST Checkpoint Codes

Uncompressed Initialization Codes

The uncompressed initialization checkpoint codes are listed in order of execution:

Checkpoint Code	Description
D0h	The 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 next.
D3h	Starting memory sizing next.
D4h	Returning to real mode. Executing any OEM
	patches and setting the stack next.
D5h	Passing control to the uncompressed code in
	shadow RAM at E000:0000h. The initialization code
	is copied to segment 0 and control will be
	transferred to segment 0.
D6h	Control is in 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.