Acer G301 manual Checkpoint Code, Description

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Checkpoint Code	Description
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 shadowing. 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.