STD BUS, CMOS STD BUS
FEATURES
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LPM-NE2000
MCM-NE2000
Ethernet LAN Card
IEEE 802.3 Ethernet controller board
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10 Mbps operation, CSMA/CD
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Supports 10BASE2 thin coax, 10BASE5 via an AUI
and 10BASE-T
twisted pair interfaces
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NE2000 compatible architecture
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Software configurable settings for jumperless, auto-
configurable,
鈥渆asy-to-use鈥?network designs
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EPROM socket for auto-boot applications
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Five LEDs onboard for visual status information
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Compatible with many Network Operating Systems
drivers and utilities
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Diagnostic loopback support for increased testability
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Supports 20- or 24-bit memory addressing
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Available for CMOS STD Bus: LPM-NE2000
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Single +5 volt power required
The MCM/LPM-NE2000 module is a NE2000 compatible
local area network adapter board designed for the STD
Bus. As a result, most network operating systems, dri-
vers and utilities for using Ethernet in a PC-compatible
environment can be used without modification.
It conforms to the IEEE 802.3 and Ethernet standards for
a 10 Mbps Carrier Sense Multiple Access/Collision
Detection (CSMA/CD) local area network. The module
provides connectivity for 10BASE5 thick coax, 10BASE2
thin coax, and 10BASE-T twisted-pair on a single board.
Also an EPROM socket is included to support user
installed remote boot extensions.
with the IEEE 802.3 standards. Supported interfaces
include both the Thin and Thick Ethernet and Twisted-
pair Ethernet (10BASE-T) on a single STD Bus board.
Attachment Unit Interface (AUI)
- The LPM/MCM-
NE2000 can be used with an external Medium
Attachment Unit (MAU) so that connectivity to
10BASE5 or another medium can be achieved. This
interface is via the 15-pin D-type connector at the board
edge. The board provides a +12 volt line to power the
transceivers via the AUI connector.
Twisted Pair Interface
- The MCM/LPM-NE2000 also
supports the use of unshielded twisted pair cable so
that it can plug into a concentrator in a 10BASE-T net-
work. An RJ-45 connector is located at the board edge.
Thin Ethernet Connection
- The board has a coaxial
transceiver interface with an onboard RG-58 type BNC
connector. A DC/DC power supply provides isolated
power from the STD Bus +5 volt supply.
EPROM Socket
- A socket is provided to support a user
installed device for auto-boot software drivers.
EEPROM
- The configuration information describing
the device鈥檚 architecture, address, interrupt, etc. can
either be loaded from jumpers or from an EEPROM.
Use of the EEPROM allows the board to be configured
FUNCTIONAL CAPABILITY
Bus Interface
- The LPM-NE2000 is the CMOS STD Bus
version and the MCM-NE2000 is the STD Bus version of
this card. The LPM/MCM prefix is used when the card
has the same features and functionality.
Addressing
- The LPM/LPM-NE2000 supports 20- or 24-
bit addressing for memory and 10-bit for I/O for use with
XT or AT compatible STD Bus processors.
Interrupts
- The LPM/MCM-NE2000 supports the STD-
8088 interrupt priority scheme on the backplane with 4
separate jumper selectable priority levels.
Ethernet Controller
- The LPM/MCM-NE2000 module
uses a 8390 compatible integrated controller. This con-
troller provides the Ethernet Media Access Control
(MAC), Encoder-Decoder (ENDEC) with an AUI inter-
face, and 10BASE-T transceiver functions in accordance
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