BOXD946GZISSL Intel (CPU), BOXD946GZISSL Datasheet - Page 84

• Manufacturer Part Number: BOXD946GZISSL
• Manufacturer: Intel (CPU)

Specifications of BOXD946GZISSL

• Lead Free Status / RoHS Status: Compliant

Intel Desktop Board D946GZIS Technical Product Specification
4.4 Port 80h POST Codes
84
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.
Displaying the POST-codes requires a PCI bus add-in card, often called a POST card.
The POST card can decode the port and display the contents on a medium such as a
seven-segment display.
NOTE
The POST card must be installed in PCI bus connector 1.
The following tables provide information about the POST codes generated by the
BIOS:
•
•
•
NOTE
In the tables listed above, all POST codes and range values are listed in hexadecimal.
Table 42. Port 80h POST Code Ranges
Range
00 – 0F
10 – 1F
20 – 2F
30 – 3F
40 – 4F
50 – 5F
60 – 6F
70 – 7F
80 – 8F
90 – 9F
A0 – AF
B0 – BF
C0 – CF
D0 – DF
E0 – FF
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
Category/Subsystem
Debug codes: Can be used by any PEIM/driver for debug.
Host Processors: 1F is an unrecoverable CPU error.
Memory/Chipset: 2F is no memory detected or no useful memory detected.
Recovery: 3F indicated recovery failure.
Reserved for future use.
I/O Busses: PCI, USB, ISA, ATA, etc. 5F is an unrecoverable error. Start with PCI.
Reserved for future use (for new busses).
Output Devices: All output consoles. 7F is an unrecoverable error.
Reserved for future use (new output console codes).
Input devices: Keyboard/Mouse. 9F is an unrecoverable error.
Reserved for future use (new input console codes).
Boot Devices: Includes fixed media and removable media. BF is an unrecoverable error.
Reserved for future use.
E0 – EE: Miscellaneous codes. See Table 43.
EF boot/S3: resume failure.
Boot device selection.
F0 – FF: FF processor exception.