American Megatrends X6DVA-EG, X6DVA-4G user manual 48h

	Appendix B: BIOS POST Checkpoint Codes
Checkpoint	Code Description
48h	Patterns written in base memory. Determining the amount of memory
	below 1 MB next.
49h	The amount of memory below 1 MB has been found and verified.
	Determining the amount of memory above 1 MB memory next.
4Bh	The amount of memory above 1 MB has been found and verified.
	Checking for a soft reset and clearing the memory below 1 MB for
	the soft reset next. If this is a power on situation, going to checkpoint
	4Eh next.
4Ch	The memory below 1 MB has been cleared via a soft reset. Clearing
	the memory above 1 MB next.
4Dh	The memory above 1 MB has been cleared via a soft reset. Saving
	the memory size next. Going to checkpoint 52h next.
4Eh	The memory test started, but not as the result of a soft reset.
	Displaying the first 64 KB memory size next.
4Fh	The memory size display has started. The display is updated during
	the memory test. Performing the sequential and random memory test
	next.
50h	The memory below 1 MB has been tested and initialized. Adjusting
	the displayed memory size for relocation and shadowing next.
51h	The memory size display was adjusted for relocation and shadow-
	ing.
	Testing the memory above 1 MB next.
52h	The memory above 1 MB has been tested and initialized. Saving
	the memory size information next.
53h	The memory size information and the CPU registers are saved.
	Entering real mode next.
54h	Shutdown was successful. The CPU is in real mode. Disabling the
	Gate A20 line, parity, and the NMI next.
57h	The A20 address line, parity, and the NMI are disabled. Adjusting
	the memory size depending on relocation and shadowing next.
58h	The memory size was adjusted for relocation and shadowing.
	Clearing the Hit <DEL> message next.
59h	The Hit <DEL> message is cleared. The <WAIT...> message is
	displayed. Starting the DMA and interrupt controller test next.

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