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Checkpoint
Beep Code
Code
68h
69h
6Ah
6Bh
6Ch
6Eh
70h
72h
76h
7Ch
7Dh
Description
Enable external cache and CPU cache if
present.
Configure non-cacheable regions if neces-
sary.
NOTE: Hook routine must preserve DX,
which carries the cache size to the Display-
CacheSizeJ routine.
Initialize the handler for SMM.
Display external cache size on the screen if it
is non-zero.
NOTE: Hook routine must preserve DX,
which carries the cache size from the cache-
ConfigureJ routine.
If CMOS is bad, load Custom Defaults from
flash into CMOS. If successful, reboot.
Display shadow message.
Display the starting offset of the non-dis-
posable segment of the BIOS.
Check flags in CMOS and in the BIOS data
area for errors detected during POST. Dis-
play error messages on the screen.
Check status bits to see if configuration
problems were detected. If so, display error
messages on the screen.
Check status bits for keyboard-related fail-
ures. Display error messages on the screen.
Initialize the hardware interrupt vectors
from 08 to 0F and from 70h to 77h. Also set
the interrupt vectors from 60h to 66h to
zero.
Initialize Intelligent System Monitoring.
29
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