Intel AT80604004872AA User Manual
Features
156
Intel® Xeon® Processor 7500 Datasheet, Volume 1
7.5.1.12
HCKS: Header Checksum
This location provides the checksum of the Header Section. Writes to this register have
no effect.
no effect.
7.5.2
Processor Data
This section contains three pieces of data:
• The S-spec/QDF of the part in ASCII format.
• (1) 2-bit field to declare if the part is a pre-production sample or a production unit.
• The system bus speed in BCD format
• (1) 2-bit field to declare if the part is a pre-production sample or a production unit.
• The system bus speed in BCD format
7.5.2.1
SQNUM: S-Spec QDF Number
This location provides the S-Spec or QDF number of the processor. The S-spec/QDF
field is six ASCII characters wide and is programmed with the same S-spec/QDF value
as marked on the processor. If the value is less than six characters in length, leading
spaces (20h) are programmed in this field. Writes to this register have no effect.
field is six ASCII characters wide and is programmed with the same S-spec/QDF value
as marked on the processor. If the value is less than six characters in length, leading
spaces (20h) are programmed in this field. Writes to this register have no effect.
Example: A processor with a QDF mark of QWFZ contains the following in field
0E-13h: 20h, 20h, 51h, 57h, 46h, 5Ah. This data consists of two blanks at 0Eh and 0Fh
followed by the ASCII codes for QEU5 in locations 10 - 13h.
0E-13h: 20h, 20h, 51h, 57h, 46h, 5Ah. This data consists of two blanks at 0Eh and 0Fh
followed by the ASCII codes for QEU5 in locations 10 - 13h.
Offset:
0Dh
Bit
Description
7:0
Header Checksum
One-byte checksum of the Header Section
00h- FFh: See
for calculation of this value.
Offset:
0Eh-13h
Bit
Description
47:40
Character 6
S-Spec or QDF character or 20h
00h-0FFh: ASCII character
39:32
Character 5
S-Spec or QDF character or 20h
00h-0FFh: ASCII character
31:24
Character 4
S-Spec or QDF character
00h-0FFh: ASCII character
23:16
Character 3
S-Spec or QDF character
00h-0FFh: ASCII character
15:8
Character 2
S-Spec or QDF character
00h-0FFh: ASCII character
7:0
Character 1
S-Spec or QDF character
00h-0FFh: ASCII character