Standard Bios Post Codes - Acer Altos G900 User Manual

Standard BIOS post codes

The table below lists the port-80 codes displayed during the boot
process. A beep code is a series of individual beeps on the PC speaker,
each of equal length. The table describes the error conditions
associated with each beep code and the corresponding POST check
point code as seen by a port 80h card. For example, if an error occurs
at checkpoint 22h, the BIOS issues the beep code 1-3-1-1.
CP Beeps
02
04
06
08
09
0A
0B
0C
0E
0F
10
11
12
14
Reason
Verify real mode
Get processor type
Initialize system hardware
Initialize chipset registers with initial POST
values
Set in POST flag
Initialize processor registers
Enable processor cache
Initialize caches to initial POST values
Initialize I/O
Initialize the local bus IDE
Initialize power management
Load alternate registers with initial POST
values
Restore processor control word during warm
boot
Initialize keyboard controller
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