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38
25
Interrupt vector initialization is done. Clearing the password if
the POST
DIAG switch is on.
27 Any initialization before setting video mode to be done.
28 Going for monochrome mode and color mode setting.
2A
Bus initialization system, static, output devices will be done
next, if present.
2B
Passing control to the video ROM to perform any required
configuration before the video ROM test.
2C To look for optional video ROM and give control.
2D
The video ROM has returned control to BIOS POST. Performing
any required processing after the video ROM had control.
2E
Completed post-video ROM test processing. If the EGA/VGA
controller is not found, performing the display memory
read/write test next.
2F EGA/VGA not found. Display memory R/W test about to begin.
30
Display memory R/W test passed. Look for retrace checking
next.
31
Display memory R/W test or retrace checking failed. To do
alternate display retrace checking.
32
Alternate display memory R/W test passed. To look for the
alternate display retrace checking.
34 Video display checking is over. Setting the display mode next.
37 The display mode is set. Displaying the power on message next.
Code Description
38
Initializing the bus input, IPL, and general devices next, if
present.
39 Displaying bus initialization error message.
3A
The new cursor position has been read and saved. Displaying
the Hit <DEL> message next.
40 Preparing the descriptor tables next.
42 Entering protected mode for the memory test next.
43
Entered protected mode. Enabling interrupts for diagnostics
mode next.
44
Interrupts enabled if the diagnostics switch is on. Initializing
data to check memory wraparound at 0:0 next.
45
Data initialized. Checking for memory wraparound at 0:0 and
finding the total system memory size next.
46
The memory wraparound test has completed. The memory size
calculation has been done. Writing patterns to test memory next.
47
The memory pattern has been written to extended memory.
Writing patterns to the base 640 KB memory test.
48 Patterns written in base memory. Determining the amount of
memory below