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BIOS Setup Information
Uncompressed Initialization Codes
The following runtime checkpoint hex codes are listed below in order of execution.
These codes are uncompressed in F0000h shadow RAM
.
Code
Description
03
The NMI is disabled. Checking for a soft reset or a power on
condition.
05
The BIOS stack has been built. Disabling cache memory.
06
Uncompressing the POST code next.
07
Initializing the CPU and the CPU data area.
08
The CMOS checksum calculation is done next.
0B
Performing required initialization before the keyboard BAT
command is issued.
0C
The keyboard controller input buffer is free. Issuing the BAT
command to the keyboard controller.
0E
The keyboard controller BAT command result has been
verified. Performing necessary initialization after the K/B
controller BATcommand test.
10
Issuing pin 23 and 24 blocking and unblocking commands.
11
Checking if the [End] or [Ins] keys were pressed during power
on.
12
Initializing CMOS if the
“
initialize CMOS RAM in every
boot
” is set or the [End] key is pressed. Disabling DMA and
Interrupt controllers.
13
The video display has been disabled. Port B has been
initialized. Initializing the chipset.
14
The 8254 timer test will begin next.
19
The 8254 timer test is finished. Starting the memory refresh
test.
