Technical information

7-65
Register Descriptions
MacAddr1 Register
Type: R/W
Internal Registers Subgroup: PCI Functional Registers
Byte Address: 0120h - 0123h
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
NIC’s MAC Addr Byte 1 --> MacAddr[7:0]
NIC’s MAC Addr Byte 0 --> MacAddr[15:8] (MSB)
Table 7-81. MacAddr1 Register
Bit(s) rw
Reset
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
M
AC
A
DDR
register. The
software driver can overwrite the value by writing to this register.
Table 7-82. MacAddr2 Register
Bit(s) rw
Reset
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
M
AC
A
DDR
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.