I/O INTERFACING
, ..
II
II
II
II
I
CHANNEL
82586
HOST ATIENTION LAN
CPU
INTERRUPT COPROCESSOR
SERIAL
INTERFACE
82501 ETHERNET SERIAL INTERFACE
TRANSCEIVER
CABLE
82C502
IEEE 802.3 COMPATIBLEETHERNET
WORKSTATIONTRANSCEIVER
CHIP
L ______
IEEE 802.3/ETHERNET LINK
Figure 8-14. LAN Station
•Direct memory access (DMA)
•Buffer chaining
•
The 82586 has two interfaces: a bus interface to the Intel386 DX microprocessor local bus and a network interface to the Serial Interface Unit. The bus interface is described here. For detailed information on using the 82586, refer to the Local Area Networking
(LAN) Component User's Manual.
The 82586, which is a master on the Inte1386 DX microprocessor local bus, communi- cates directly with the Inte1386 DX microprocessor through the Channel Attention (CA) and interrupt (INT) signals. There are several ways to design an interface between the
