Table 2-16, Post prog – Sun Microsystems SUN STOREDGETM 5310 NAS User Manual
Page 78
2-32
Sun StorEdge 5310 NAS Troubleshooting Guide • December 2004
12h
Off
Off
G
R
Get start of initialization code and check BIOS header.
13h
Off
Off
G
A
Memory sizing.
14h
Off
G
Off
R
Test base 512K of memory. Return to real mode. Execute any OEM
patches and set up the stack.
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.
16h
Off
G
G
R
Control is in segment 0. Verify the system BIOS checksum. 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
Decompression 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.
EEh
A
A
A
Off
Jump to boot sector.
TABLE 2-16
POST Progress LED Code Table (Port 80h Codes)
POST
Code
Diagnostic LED Decoder
(G = green, R = red, A = amber)
Description
MSB
LSB
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.
TABLE 2-15
Boot Block POST Progress LED Code Table (Port 80h Codes) (Continued)
POST
Code
Diagnostic LED Decoder
(G = green, R = red, A = amber)
Description