63
Checkpoint Code
Description
03h
The NMI is disabled. Next, checking for a soft reset or a power on
condition.
05h
The BIOS stack has been built. Next, disabling cache memory.
06h
Uncompressing the POST code next.
07h
Next, initializing the CPU and the CPU data area.
08h
The CMOS checksum calculation is done next.
0Bh
Next, performing any required initialization before the keyboard BAT
command is issued.
0Ch
The keyboard controller input buffer is free. Next, issuing the BAT
command to the keyboard controller.
0Eh
The keyboard controller BAT command result has been verified. Next,
performing any necessary initialization after the keyboard controller BAT
command test.
0Fh
The initialization after the keyboard controller BAT command test is done.
The keyboard command byte is written next.
10h
The keyboard controller command byte is written. Next, issuing the Pin 23
and 24 blocking and unblocking commands.
11h
Next, checking if the <End or <Ins> keys were pressed during power on.
Initializing CMOS RAM if the Initialize CMOS RAM in every boot
AMIBIOS POST option was set in AMIBCP or the <End> key was
pressed.
12h
Next, disabling DMA controllers 1 and 2 and interrupt controllers 1 and 2.
13h
The video display has been disabled. Port B has been initialized. Next,
initializing the chipset.
14h
The 8254 timer test will begin next.
19h
The 8254 timer test is over. Starting the memory refresh test next.
1Ah
The memory refresh line is toggling. Checking the 15 second on/off time
next.
23h
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.
24h
The configuration required before interrupt vector 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.
28h
Initialization before setting the video mode is complete. Configuring the
monochrome mode and color mode settings next.
2Ah
Bus initialization system, static, output devices will be done next, if present.
See page 71 for additional information.
2Bh
Passing control to the video ROM to perform any required configuration
before the video ROM test.
