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POST Code (Hex)
51h
52h
53h
54h
55h
56h
57h
58h
59h
5Ah
5Bh
5Ch
5Dh
5Eh
5Fh
60h
6 h
6 h
6 h
6 h
6 h
6h
67h
68h
69h
6Ah
6Bh
6Ch
6Dh
6Eh
6Fh
70h
71h
72h
73h
74h
75h
66
Reserved
Test all memory (clear all extended memory to 0)
Clear password according to H/W jumper (Optional)
Reserved
Display number of processors (multi-processor platform)
Reserved
1 Display PnP logo
2 Early ISA PnP initialization
Assign CSN to every ISA PnP device
q
Reserved
Initialize the combined Trend Anti-Virus code
Reserved
(Optional Feature) Show message for entering AWDFLASH.EXE from FDD
Reserved
1 Initialize Init_Onboard_Super_IO
2 Initialize Init_Onbaord_AUDIO
Reserved
Reserved
Okay to enter Setup utility; i.e. not until this POST stage can users enter the CMOS
setup utility.
Reserved
Reserved
Reset keyboard if Early_Reset_KB is not defined
Reserved
Initialize PS/2 Mouse
Reserved
Prepare memory size information for function call: INT 15h ax=E820h
Reserved
Turn on L2 cache
Reserved
Program chipset registers according to items described in Setup & Auto-
configuration table.
Reserved
1 Assign resources to all ISA PnP devices.
2 Auto assign ports to onboard COM ports if the corresponding item in Setup is set
to "AUTO".
Reserved
1 Initialize floppy controller
2 Set up floppy related fields in 40:hardware
Reserved
Reserved
Reserved
Reserved
Reserved
Detect & install all IDE devices: HDD, LS120, ZIP, CDROM.....
POST Routine Description
Chapter 4
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