Networking Silicon — GD82559ER
The Subsystem Vendor ID field identifies the vendor of an
The Subsystem ID field identifies the
The 82559ER provides support for configurable Subsystem Vendor ID and Subsystem ID fields. After hardware reset is
The 82559ER checks bit numbers 15, 14, and 13 in the EEPROM, word Ah and functions according to Table 7 below.
Bits 15, 14 | Bit 13 | Device ID | Vendor ID | Revision ID | Subsystem ID | Subsystem | |
Vendor ID | |||||||
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11b, 10b, | X | 1209H | 8086H | 09H | 0000H | 0000H | |
00b |
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| (Default) | (Default) | |
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01b | 0b | 1209H | 8086H | 09H | Word BH | Word CH | |
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01b | 1b | 1209H | 8086H | Word AH, | Word BH | Word CH | |
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| bits 10:8 |
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Note: The Revision ID is subject to change according to the silicon stepping.
The above table implies that if the 82559ER detects the presence of an EEPROM (as indicated by a value of 01b in bits 15 and 14), then bit number 13 determines whether the values read from the EEPROM, words Bh and CH, will be loaded into the Subsystem ID (word BH) and Subsystem Vendor ID (word CH) fields. If bits 15 and 14 equal 01b and bit 13 equals 1b, the three least significant bits of the Revision ID field are programmed by bits
Between the
The Capability Pointer is a hard coded byte register with a value of DCH. It provides an offset within the Configuration Space for the location of the Power Management registers.
The Interrupt Line register identifies which system interrupt request line on the interrupt contoller the device’s PCI interrupt request pin (as defined in the Interrupt Pin register) is routed to.
Datasheet | 53 |