Intel SE7221BK1-E manual Post Progress Codes

SE7221BK1-E Technical Product Specification

		Diagnostic LED				Description
			Decoder
	G=Green, R=Red,
			A=Amber
	Hi				Low
15h	Off		G	Off	A	Pass control to the uncompressed code in shadow RAM. The initialization code
						is copied to segment 0 and control will be transferred to segment 0.
						Control is in segment 0. Verify the system BIOS checksum.
16h	Off		G	G	R	If the system BIOS checksum is bad, go to checkpoint code E0h.
						Otherwise, going to checkpoint code D7h.
17h	Off		G	G	A	Pass control to the interface module.
18h	G		Off	Off	R	Decompress of the main system BIOS failed.
19h	G		Off	Off	A	Build the BIOS stack. Disable USB controller. Disable cache.
1Ah	G		Off	G	R	Uncompress the POST code module. Pass control to the POST code module.
1Bh	A		R	Off	R	Decompress the main system BIOS runtime code.
1Ch	A		R	Off	A	Pass control to the main system BIOS in shadow RAM.
E0h	R		R	R	Off	Start of recovery BIOS. Initialize interrupt vectors, system timer, DMA controller,
						and interrupt controller.
E8h	A		R	R	Off	Initialize extra module if present.
E9h	A		R	R	G	Initialize floppy controller.
Eah	A		R	A	Off	Try to boot floppy diskette.
Ebh	A		R	A	G	If floppy boot fails, intialize ATAPI hardware.
Ech	A		A	R	Off	Try booting from ATAPI CD-ROM drive.
Eeh	A		A	A	Off	Jump to boot sector.
Efh	A		A	A	G	Disable ATAPI hardware.

					Table 77. POST Progress Codes
	Diagnostic LED				Description
	Decoder
	G=Green, R=Red,
	A=Amber
	Hi			Low
20h	Off	Off	R	Off	Uncompress various BIOS Modules
22h	Off	Off	A	Off	Verify password Checksum
24h	Off	G	R	Off	Verify CMOS Checksum.
26h	Off	G	A	Off	Read Microcode updates from BIOS ROM.
28h	G	Off	R	Off	Initializing the processors. Set up processor registers. Select least featured
					processor as the BSP.
2Ah	G	Off	A	Off	Go to Big Real Mode
2Ch	G	G	R	Off	Decompress INT13 module
2Eh	G	G	A	Off	Keyboard Controller Test: The keyboard controller input buffer is free. Next,
					issuing the BAT command to the keyboard controller
30h	Off	Off	R	R	Keyboard/Mouse port swap, if needed
32h	Off	Off	A	R	Write Command Byte 8042: The initialization after the keyboard controller BAT
					command test is done. The keyboard command byte will be written next.
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