BOXD945GCZL Intel (CPU), BOXD945GCZL Datasheet - Page 88

• Manufacturer Part Number: BOXD945GCZL
• Manufacturer: Intel (CPU)

Specifications of BOXD945GCZL

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Intel Desktop Board D945GCZ Technical Product Specification
4.4 Port 80h POST Codes
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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.
The POST card must be installed in PCI bus connector 1.
The following tables provide information about the POST codes generated by the BIOS:
•
•
•
In the tables listed above, all POST codes and range values are listed in hexadecimal.
Table 44.
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
NOTE
NOTE
Table 44 lists the Port 80h POST code ranges
Table 45 lists the Port 80h POST codes themselves
Table 46 lists the Port 80h POST sequence
Port 80h POST Code Ranges
Category/Subsystem
Debug codes: Can be used by any PEIM/driver for debug.
Reserved for future use.
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.
Boot device selection.
F0 – FF: FF processor exception.
E0 – EE: Miscellaneous codes. See Table 45.
EF boot/S3: resume failure.
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.
I/O Busses: PCI, USB, ISA, ATA, etc. 5F is an unrecoverable error. Start with PCI.
Reserved for future use (for new busses).