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Checkpoint Code
25h
27h
28h
2Ah
2Bh
2Ch
2Dh
2Eh
2Fh
30h
31h
32h
34h
Description
Interrupt vector initialization is done. Clearing the
password if the POST DIAG switch is on.
Any initialization before setting video mode will
be done next.
Initialization before setting the video mode is
complete. Configuring the monochrome mode and
color mode settings next.
Bus initialization system, static, output devices will
be done next, if present. See page 91 for additional
information.
Passing control to the video ROM to perform any
required configuration before the video ROM test.
All necessary processing before passing control to
the video ROM is done. Looking for the video ROM
next and passing control to it.
The video ROM has returned control to BIOS POST.
Performing any required processing after the video
ROM had control.
Completed post-video ROM test processing. If the
EGA/VGA controller is not found, performing the
display memory read/write test next.
The EGA/VGA controller was not found. The display
memory read/write test is about to begin.
The display memory read/write test passed. Look
for retrace checking next.
The display memory read/write test or retrace
checking failed. Performing the alternate display
memory read/write test next.
The alternate display memory read/write test
passed. Looking for alternate display retrace
checking next.
Video display checking is over. Setting the display
mode next.
85
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