Acer X1301 manual Post Code Hex Post Routine Description

POST Code (Hex)		POST Routine Description
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…..

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