5-1
Chapter 5 - 16-Bit Ethernet Installation
Introduction
The XVME-956/411 is a 16-bit Ethernet interface implemented on a PC/104 com-
patible card. The XVME-956/411 supports 10BaseT (Twisted pair) and 10Base2
(Thin-BNC) Ethernet, plus has an AUI connector for connection to external trans-
ceivers. The XVME-956/411 is compatible with the NE2000 or WD8013EBT de-
pending on user configurable EEPROM setup options.
Most XVME-956/411 options are able to be set via a provided setup utility. The two
option jumpers available are
8/16 bit bus select
and
10Base2 termination
. Setup op-
tions are stored in an on card EEPROM so that the setup utility need only be run
when changing hardware settings.
Programmable options include emulation mode NE2000 or WD8013EBT, I/O ad-
dress, boot PROM enable, boot PROM location, boot PROM size, interrupt select,
and 10BaseT / 10Base2 / AUI selection. Selectable interrupts are IRQ2, IRQ3,
IRQ4, IRQ5, IRQ10, IRQ11, and IRQ12.
The 10Base2 DC-DC converter can be turned off to minimize power when idle, and
is automatically disabled when the XVME-956/411 is setup for twisted pair cable
use. The all CMOS design of the XVME-956/411 plus efficient DC-DC converter
keeps operating power below 2 watts. Standard packet buffer is 16 Kbytes.
A 32-pin dip socket allows installation of 28 or 32-pin boot PROMs from network
vendors. The XVME-956/411 is capable of writing to the boot PROM, allowing use
of a 5V flash boot PROM if desired.
Hardware Configuration
The XVME-956/411 has two hardware configuration options:
10Base2 (BNC) ter-
mination
, and
8 bit/AUTO bus size selection
. The options are selected with shorting
jumpers placed on three pin headers. In the following sections, when the words
"up"
,
"down"
,
"right"
, and
"left"
are used, it is assumed that the XVME-956/411
card is oriented with its bus connectors J1 and J2 at the bottom edge of the card. See
Figure 5-1 for jumper locations.
Summary of Contents for XVME-976/202
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