Port 80H Post Code Ranges; Typical Port 80H Post Sequence - Intel CoreTM 2 Duo Processor User Manual

Error Messages and Beep Codes
The following tables provide information about the POST codes generated by the BIOS:
• Table 24
• Table 25
Table 24.

Port 80h POST Code Ranges

Range (Hex)
E0 – FF F0 – FF
Table 25. Typical Port 80h POST Sequence (Sheet 1 of 2)
POST Code
June 2007
Order Number: 316639-002
lists the Port 80h POST code ranges
lists the Port 80h POST sequence
00 – 0F Debug codes: Can be used by any PEIM/driver for debug.
10 – 1F Host Processors: 1F is an unrecoverable processor error.
20 – 2F Memory/Chipset: 2F is no memory detected or no useful memory detected.
30 – 3F Recovery: 3F indicated recovery failure.
40 – 4F Reserved for future use.
I/O Busses: PCI, USB, ISA, ATA, etc. 5F is an unrecoverable error. Start
50 – 5F
with PCI.
60 – 6F Reserved for future use (for new busses).
70 – 7F Output Devices: All output consoles. 7F is an unrecoverable error.
80 – 8F Reserved for future use (new output console codes).
90 – 9F Input devices: Keyboard/Mouse. 9F is an unrecoverable error.
A0 – AF Reserved for future use (new input console codes).
Boot Devices: Includes fixed media and removable media. BF is an
B0 – BF
unrecoverable error.
C0 – CF Reserved for future use.
D0 – DF Boot device selection.
FF processor exception. E0 – EE: Miscellaneous codes. EF boot/S3: resume
failure.
21 Initializing a chipset component
22 Reading SPD from memory DIMMs
23 Detecting presence of memory DIMMs
25 Configuring memory
28 Testing memory
34 Loading recovery capsule
E4 Entered DXE phase
12 Starting Application processor initialization
13 SMM initialization
50 Enumerating PCI busses
51 Allocating resources to PCI bus
92 Detecting the presence of the keyboard
90 Resetting keyboard
94 Clearing keyboard input buffer
95 Keyboard Self Test EB Calling Video BIOS
58 Resetting USB bus
Category/Subsystem
Description
User's Manual
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