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