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910GL датащи(PDF) 163 Page - Intel Corporation |
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910GL датащи(HTML) 163 Page - Intel Corporation |
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163 / 426 page ![]() Host-PCI Express* Bridge Registers (D1:F0) (Intel® 82915G/82915P/82915PL Only) R Datasheet 163 8.1.45 VCECH—Virtual Channel Enhanced Capability Header (D1:F0) PCI Device: 1 Address Offset: 100h Default Value: 14010002h Access: RO Size: 32 bits This register indicates PCI Express device Virtual Channel capabilities. Note: Extended capability structures for PCI Express devices are located in PCI Express extended configuration space and have different field definitions than standard PCI capability structures. Bit Access & Default Description 31:20 RO 140h Pointer to Next Capability: The Link Declaration Capability is the next in the PCI Express* extended capabilities list. 19:16 RO 1h PCI Express Virtual Channel Capability Version: Hardwired to 1 to indicate compliances with the 1.0a version of the PCI Express specification. 15:0 RO 0002h Extended Capability ID: Value of 0002 h identifies this linked list item (capability structure) as being for PCI Express Virtual Channel registers. 8.1.46 PVCCAP1—Port VC Capability Register 1 (D1:F0) PCI Device: 1 Address Offset: 104h Default Value: 00000001h Access: RO, R/WO Size: 32 bits This register describes the configuration of PCI Express Virtual Channels associated with this port. Bit Access & Default Description 31:7 Reserved 6:4 RO 000b Low Priority Extended VC Count: This field indicates the number of (extended) Virtual Channels in addition to the default VC belonging to the low-priority VC (LPVC) group that has the lowest priority with respect to other VC resources in a strict-priority VC Arbitration. The value of 0 in this field implies strict VC arbitration. 3 Reserved 2:0 R/WO 001b Extended VC Count: This field indicates the number of (extended) Virtual Channels in addition to the default VC supported by the device. |
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