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LED information
POST progress codes and definitions
The following table shows the current boot progress codes and associated messages, sent
to the POST progress LEDs:
Progress Code Definition
Host Processor
0×10 Power-on initialization of the host processor (Boot Strap
Processor)
0×11 Host processor cache initialization (including AP)
0×12 Starting Application processor initialization
0×13 SMM initialization
Chipset
0×21 Initializing a chipset component
Memory
0×22 Reading configuration data from memory (SPD on DIMM)
0×23 Detecting presence of memory
0×24 Programming timing parameters in the memory controller
0×25 Configuring memory parameters in the memory controller
0×26 Optimizing memory controller settings
0×27 Initializing memory, such as ECC init
0×28 Testing memory
PCI Bus
0×50 Enumerating PCI busses
0×51 Allocating resources to PCI busses
0×52 Hot-plug PCI controller initialization
0×53-0×57 Reserved for PCI bus
USB
0×58 Resetting USB bus
0×59 Reserved for USB devices
ATA/ATAPI/SATA
0×5A Resetting PATA/SATA bus and all devices
8510702.book Page 203 Thursday, July 7, 2005 11:21 AM