Intel Desktop Board D945GRW BLKD945GRWLK User Manual
Product codes
BLKD945GRWLK
Intel Desktop Board D945GRW Technical Product Specification
86
4.4 Port 80h POST Codes
During the POST, the BIOS generates diagnostic progress codes (POST-codes) to I/O port 80h. If
the POST fails, execution stops and the last POST code generated is left at port 80h. This code is
useful for determining the point where an error occurred.
the POST fails, execution stops and the last POST code generated is left at port 80h. This code is
useful for determining the point where an error occurred.
The following tables provide information about the POST codes generated by the BIOS:
• Table 42 lists the Port 80h POST code ranges
• Table 43 lists the Port 80h POST codes themselves
• Table 44 lists the Port 80h POST sequence
• Table 43 lists the Port 80h POST codes themselves
• Table 44 lists the Port 80h POST sequence
NOTE
In the tables listed above, all POST codes and range values are listed in hexadecimal.
Table 42. Port 80h POST Code Ranges
Range Category/Subsystem
00 – 0F
Debug codes: Can be used by any PEIM/driver for debug.
10 – 1F
Host Processors: 1F is an unrecoverable CPU 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.
50 – 5F
I/O Busses: PCI, USB, ISA, ATA, etc. 5F is an unrecoverable error. Start 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).
B0 – BF
Boot Devices: Includes fixed media and removable media. BF is an unrecoverable error.
C0 – CF
Reserved for future use.
D0 – DF
Boot device selection.
E0 – FF
F0 – FF: FF processor exception.
E0 – EE: Miscellaneous codes. See Table 43.
EF boot/S3: resume failure.