Intel Desktop Board DP55KG Product Guide
76
Table 17 lists the Port 80h POST codes in hexadecimal notation.
Table 17. Port 80h POST Codes
POST Code
Description
ACPI S States
00
Entering S0 state, standard
01-05
Entering S1-S5 state
10, 20, 30,
40, 50
Resuming from S1-S5 state
Security Phase (SEC)
08
Starting BIOS execution after CPU BIST
09
SPI prefetching and caching
0A, 0B
Load BSP/APS microcode
0C
Platform program base addresses
0D
Wake up all APS
0E Initialize
NEM
0F
Pass entry point of the PEI core
PEI Phase Before MRC
11
Set bootmode, GPIO init
12
Early chipset register programming
13
Basic PCH init, discrete device init
14 LAN
init
15
Exit early platform init driver
16
SMBUS driver init
17, 18
Entry/Exit to SMBUS execute read/write
19, 1A
Entry/Exit to CK505 programming
1B, 1C
Entry/Exit to PEI overclock programming
MEC Memory Detection
21
MRC entry point
23
Reading SPD from memory DIMMs
24
Detecting presence of memory DIMMs
27 Configuring
memory
28
Testing memory
29
Exit MRC driver
PEI After MRC
2A, 2B
Start/finish programming MTRR settings
PEIMs/Recovery
31, 33, 34
Recovery has initiate, load, valid
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