Intel 386 manual LAN Station

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

231732i8-14

Figure 8-14. LAN Station

•Direct memory access (DMA)

•Buffer chaining

•High-level (user) command interpretation

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

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