User`s guide

1
Introduction
This chapter describes the main components of the EB140A–TX. The chapter
describes how to interpret the LEDs and connectors on the EB140A–TX, and it
describes the bit mapping of the general-purpose port.
1.1 What is the EB140A–TX?
The EB140A–TX is a 10BASE–T and 100BASE–TX PCI bus master adapter
board that demonstrates the functionality of the 21140A. With the EB140A–TX
installed in a personal computer (PC), you can evaluate the hardware, PCI
protocols, Ethernet controller, and autonegotiation protocols, and develop
drivers for an Ethernet node.
For more information about the 21140A, refer to the Digital Semiconductor
21140A PCI Fast Ethernet LAN Controller Data Sheet.
Preliminary—Subject to Change—July 1996 1–1