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Ethernet controller
The Ethernet controller on the LS Pro system board uses a block of 17 I/O ports from
0300h to 0310h.
Port
300
0301-0303
304
0305-0307
0308-030F
310
82596 PORT
This is a 16-bit write only port. The data definition of this port is given in the
address
manufacturers data book.
82596 CA
This is a 16-bit write only port that has no data associated with it. An access to this
address
port activates the CA control signal. A definition of the operation of this port is
given in the manufacturers data book.
Ethernet ID
The lower six bytes of the ID PROM contain the six byte Ethernet ID.
PROM
030Eh is reserved, and 030Fh contains a checksum for the other seven bytes.
Ethernet status
This port has different functions in read and write cycles.
register
7
6
5
4
Bit 0
Bits 1-3
Memory and I/O Usage
Function
82596 PORT address
reserved
82596 CA address
reserved
Ethernet ID PROM
Ethernet status register
Port
308
309
030A
030B
030C
030D
3
2
1
0
596IRQ
reserved
LAN ID0
LAN ID1
revision
speed
This bit returns the current state of the IRQ line from the 82596
Ethernet coprocessor.
Reserved.
LS PRO HARDWARE TECHNICAL REFERENCE 5/15
ID byte
0
1
2
3
4
5
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