ADWPCIXRSKU20 Intel, ADWPCIXRSKU20 Datasheet - Page 139

• Manufacturer Part Number: ADWPCIXRSKU20
• Manufacturer: Intel

Specifications of ADWPCIXRSKU20

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Intel® Server Board SE7320VP2
6.5
6.5.1
The BIOS sends a 1-byte hex code to port 80 before each task. The port 80 codes provide a
troubleshooting method in the event of a system hang during POST. Table 73 provides a list of
the Port 80 codes and the corresponding task description.
6.5.2
All port 80 codes are displayed using the Diagnostic LEDs found on the back edge of the
baseboard. The diagnostic LED feature consists of a hardware decoder and four dual color
LEDs. During POST, the LEDs will display all normal POST codes representing the progress of
the BIOS POST. Each code will be represented by a combination of colors from the four LEDs.
The LEDs are capable of displaying three colors: Green, Red, and Amber. The POST codes are
divided into two nibbles, an upper nibble and a lower nibble. Each bit in the upper nibble is
represented by a Red LED and each bit in the lower nibble is represented by a green LED. If
both bits are set in the upper and lower nibbles then both Red and Green LEDs are lit, resulting
in an Amber color. If both bits are clear, then the LED is off.
In the below example, BIOS sends a value of ACh to the Diagnostic LED decoder. The LEDs
are decoded as follows:
Since the red bits correspond to the upper nibble and the green bits correspond to the lower
nibble, the two are concatenated to be ACh.
Revision 2.1
Ach
Result
LEDs
Checkpoints
Red bits = 1010b = Ah
Green bits = 1100b = Ch
System ROM BIOS POST Task Test Point (Port 80h Code)
Diagnostic LEDs
1
Amber
Red
MSB
1
Green
Table 74. POST Progress Code LED Example
Intel order number C91056-002
0
Green
Red
1
Green
1
Red
Red
0
Green
Error Reporting and Handling
0
Off
Red
LSB
0
Green
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