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Checkpoint
2Dh
23h
24h
25h
27h
28h
2Ah
2Eh
2Fh
30h
31h
32h
34h
37h
38h
39h
3Ah
3Bh
40h
42h
43h
44h
45h
46h
Code Description
The video ROM has returned control to BIOS POST. Performing any required
processing after the video ROM had control
Reading the 8042 input port and disabling the 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 initialization has completed.
Interrupt vector initialization is about to begin.
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
the last page for additional information.
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.
The display mode is set. Displaying the power on message next.
Initializing the bus input, IPL, general devices next, if present. See the last page
of this chapter for additional information.
Displaying bus initialization error messages. See the last page of this chapter for
additional information.
The new cursor position has been read and saved. Displaying the Hit <DEL>
message next.
The Hit <DEL> message is displayed. The protected mode memory test is about
to start.
Preparing the descriptor tables next.
The descriptor tables are prepared. Entering protected mode for the memory test
next.
Entered protected mode. Enabling interrupts for diagnostics mode next.
Interrupts enabled if the diagnostics switch is on. Initializing data to check
memory wraparound at 0:0 next.
Data initialized. Checking for memory wraparound at 0:0 and finding the total
system memory size next.
The memory wraparound test is done. Memory size calculation has been done.
Writing patterns to test memory next.
B-3
:
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