Xycom XVME-956 Series Manual page 96

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6.1 I N T R O D U C T I O N
The XVME-956/411 is a 16-bit Ethernet interface implemented on a PC/104 compatible card. The
XVME-956/411 supports 10BaseT (Twisted pair) and 10Base2 (Thin-BNC) Ethernet, plus has an AUI
connector for connection to external transceivers. The XVME-956/411 is compatible with the NE2000
or WD8013EBT depending 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 options 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 address, 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 use. T h e all CMOS design of the XVME-
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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. T h e
XVME-956/411 is capable of writing to the boot PROM, allowing use of a 5V flash boot PROM i f
desired.
6.2 H A R D W A R E CONFIGURATION
The XVME-956/411 has two hardware configuration options: 10Base2 (BNC) termination, and 8
bit/AUTO bus size selection. The options are selected with shorting jumpers placed on three pin
headers. I n 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 6-1 for jumper locations.
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Chapter 6 - 16-BIT ETHERNET INSTALLATION
6-1