Intel DB75EN, Specification

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Intel Desktop Board DB75EN Technical Product Specification
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Table 47. Port 80h POST Codes
Port 80 Code Progress Code Enumeration
ACPI S States
0x00,0x01,0x02,0x03,0x04,0x05 Entering S0, S2, S3, S4, or S5 state
0x10,0x20,0x30,0x40,0x50 Resuming from S2, S3, S4, S5
Security Phase (SEC)
0x08 Starting BIOS execution after CPU BIST
0x09 SPI prefetching and caching
0x0A Load BSP microcode
0x0B Load APs microcodes
0x0C Platform program baseaddresses
0x0D Wake Up All APs
0x0E Initialize NEM
0x0F Pass entry point of the PEI core
PEI before MRC
PEI Platform driver
0x11 Set bootmode, GPIO init
0x12 Early chipset register programming including graphics init
0x13 Basic PCH init, discrete device init (1394, SATA)
0x14 LAN init
0x15 Exit early platform init driver
PEI SMBUS
0x16 SMBUSriver init
0x17 Entry to SMBUS execute read/write
0x18 Exit SMBUS execute read/write
PEI CK505 Clock Programming
0x19 Entry to CK505 programming
0x1A Exit CK505 programming
PEI Over-Clock Programming
0x1B Entry to entry to PEI over-clock programming
0x1C Exit PEI over-clock programming
Memory
0x21 MRC entry point
0x23 Reading SPD from memory DIMMs
0x24 Detecting presence of memory DIMMs
0x27 Configuring memory
0x28 Testing memory
0x29 Exit MRC driver
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