Intel Raptor AT manual Memory refresh line is toggling. Checking

Raptor AT – Installation Guide
Checkpoint	Description
Code
1Ah	The memory refresh line is toggling. Checking the 15
	second on/off time next.
	Reading the 8042 input port and disabling the
23h	MEGAKEY Green PC feature next. Making the BIOS
	code segment writable and performing any necessary
	configuration before initializing the interrupt vectors.
	The configuration required before interrupt vector
24h	initialization has completed. Interrupt vector
	initialization is about to begin.
25h	Interrupt vector initialization is done.	Clearing	the
	password if the POST DIAG switch is on.
27h	Any initialization before setting video	mode will	be
	done next.
	Initialization before setting the video mode is complete.
28h	Configuring the monochrome mode and color mode
	settings next.
	Bus initialization system, static, output devices will be
2Ah	done next, if present. See Table D-7for additional
	information.
2Bh	Passing control to the video ROM to	perform	any
	required configuration before the video ROM test.
	All necessary processing before passing control to the
2Ch	video ROM is done. Looking for the video ROM next
	and passing control to it.
	The video ROM has returned control to BIOS POST.
2Dh	Performing any required processing after the video
	ROM had control.
	Completed post-video ROM test processing. If the
2Eh	EGA/VGA controller is not found, performing the
	display memory read/write test next.
2Fh	The EGA/VGA controller was not found. The display
	memory read/write test is about to begin.
30h	The display memory read/write test passed. Look		for
	retrace checking next.
	The display memory read/write test or retrace checking
31h	failed. Performing the alternate display memory
	read/write test next.
32h	The alternate display memory read/write test passed.
	Looking for alternate display retrace checking next.
34h	Video display checking is over. Setting the display
	mode next.

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