BIOS POST Check Point List 4-37
BI
O
S Se
tu
p
1A
The memory refresh line is toggling. Checking the 15us on/off time.
23
Reading the 8042 input port and disabling the MEGAKEY Green PC
feature. Making the BIOS code segment writable and performing any
necessary configuration before initializing the interrupt vectors.
24
The configuration or Setup required before interrupt vector initialization
has completed. Interrupt of vector initialization is about to begin.
25
Interrupt vector initialization is done. Clearing the password if the POST
DIAG switch is on.
27
Any initialization before setting video mode.
28
Going for monochrome mode and color mode settings.
2A
Bus initialization system, static, output devices, 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 transfer 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, perform the display memory read/write test.
2F
EGA/VGA not found. Display memory R/W test is about to begin.
30
Display memory R/W test passed. Look for retrace checking.
31
Display memory R/W test or retrace checking failed. Perform alternate
display retrace checking.
32
Alternate display memory R/W test passed. Look for the alternate display
retrace checking.
34
Video display test is over. Setting the display mode.
Table 4-12.Uncompressed Initialization Codes
(Continued)
Code
Description
