Mitsubishi Electric Apricot LS Pro, Hardware Technical Reference

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Chapter 4
Chapter 6
Memory and I/O Usage
Appendix A
Appendix C
Pr
eface
Chapter 4Chapter 5
LS PRO HARDWARE TECHNICAL REFERENCE 5/15
Ethernet controller
The Ethernet controller on the LS Pro system board uses a block of 17 I/O ports from
0300h to 0310h.
Port Function
300 82596 PORT address
0301-0303 reserved
304 82596 CA address
0305-0307 reserved
0308-030F Ethernet ID PROM
310 Ethernet status register
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
Port ID byte
308 0
309 1
030A 2
030B 3
030C 4
030D 5
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 3 2 1 0
596IRQ
reserved
LAN ID0
LAN ID1
revision
speed
Bit 0 This bit returns the current state of the IRQ line from the 82596
Ethernet coprocessor.
Bits 1-3 Reserved.