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.
TABLE2-16 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.
TABLE2-15 Boot Block POST Progress LED Code Table (Port 80h Codes) (Continued)
POST
Code Diagnostic LED Decoder
(G = green, R = red, A = amber) Description