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Checkpoint
No.
Description
D4h
Normal POST start
3Ah
Interval timer channel 2 test in-progress or
failure
3Bh
Time-Of-Day clock test in-progress or failure
3Ch
Serial port test test in-progress or failure
3Dh
Parallel port test test in-progress or failure
3Eh
Math Coprocessor test in-progress or failure
50h
Initial M1429
52h
Dynamic Memory Configuration & check
external Cache size
53h
Shadow BIOS
54h
Perform PCI device initialization
55h
Check CMOS checksum
56h
Check CMOS config against actual
57h
Enable/disable enternal cache
5Fh
Initial PnP device nodes
90h
Enable/disable external cache
70h
For PCI
71h
For PCI
72h
For PCI
73h
For PCI
74h
For PCI
75h
For PCI
76h
Begin PCI devices initialization
77h
Configures PCI VGA devices
78h
Except VGA
79h
Begin PCI service routines
7Ah
PCI Option ROM initialization
E0h
Shadow PCI non-VGA option ROM
E1h
Shadow PCI VGA option ROM to C000 segment
E3h
Start to find PCI option ROM
E4h
Begin to shadow PCI option ROM
A-4
Error Messages