52
POST (hex)
Description
51h
Reserved
52h
Test all memory (clear all extended memory to 0)
53h ~54h Reserved
55h
Display number of processors (multi-processor platform)
56h
Reserved
57h
1. Display PnP logo
2. Early ISA PnP initialization
-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 (optional)
5Ch
Reserved
5Dh
1. Initialize Init_Onboard_Super_IO switch.
2. Initialize Init_Onbaord_AUDIO switch.
5Eh ~ 5Fh Reserved
60h
Okay to enter Setup utility; i.e. not until this POST stage can users
enter the CMOS setup utility.
61h ~ 64h Reserved
65h
Initialize PS/2 Mouse
66h
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.