Adaptec 1737100 Programmer Manual - Page 137

Register Descriptions MacAddr1 Register Type: R/W Internal Registers Subgroup: PCI Functional Registers Byte Address: 0120h - 0123h Table 7-81. MacAddr1 Register Reset Bit(s) rw Value Description/Function 31:0 r/w 0 MacAddr[31:0]: The MAC address of the AIC-6915 is read from the external serial EPROM and loaded in to the MACADDR register. The software driver can overwrite the value by writing to this register. NIC's MAC Addr Byte 5 --> MacAddr[7:0] (LSB) NIC's MAC Addr Byte 4 --> MacAddr[15:8] NIC's MAC Addr Byte 3 --> MacAddr[23:16] NIC's MAC Addr Byte 2 --> MacAddr[31:24] MacAddr2 Register Type: R/W Internal Registers Subgroup: PCI Functional Registers Byte Address: 0124h - 0127h Table 7-82. MacAddr2 Register Reset Bit(s) rw Value Description/Function 31:16 r 0 Reserved: Always reads 0. 15:0 r/w 0 MacAddr[47:32]: The MAC address of the AIC-6915 is read from the external serial EPROM and loaded to the MACADDR register. The software driver can overwrite the value by writing to this register. The transmit engine uses the address to create the media header when selecting an ECB descriptor format. NIC's MAC Addr Byte 1 --> MacAddr[7:0] NIC's MAC Addr Byte 0 --> MacAddr[15:8] (MSB) 7-65