Scsi Termination; Ethernet Interface - Motorola MVME2700 Series Installation And Use Manual

SCSI Termination

The individual configuring the system must ensure that the SCSI bus is
properly terminated at both ends.
In MVME712M I/O mode, the base board uses the sockets provided for
SCSI bus terminators on the three-row P2 adapter board supplied with the
MVME712M. If the SCSI bus ends at the adapter board, termination
resistors must be installed there. +5V DC power to the SCSI bus
signal and termination resistors is supplied through a fuse located on the
adapter board. The five-row P2 adapter, MVME761P2-011 is compatible
with the MVME712M for support of 16-bit SCSI and PMC I/O. It requires
a five-row backplane.
In MVME761 I/O mode, the P2 adapter board used with the MVME761
has a jumper to enable/disable SCSI bus terminators. +5V DC power for
SCSI termination is supplied through a polyswitch located on the adapter
board.

Ethernet Interface

The MVME2700 VME module uses Digital Equipment's DEC21140 PCI
Fast Ethernet LAN controller to implement an Ethernet interface that
supports both AUI (via MVME712M) and 10BaseT/100BaseTX (via
MVME761) connections. The balanced differential transceiver lines are
coupled via on-board transformers.
The MVME2700 routes its AUI or 10BaseT/100BaseTX lines through the
P2 connector to the transition module. The MVME712M front panel has
an industry-standard DB-15 connector for an AUI connection. The
MVME761 supports 10BaseT/100BaseTX connections.
Every MVME2700 is assigned an Ethernet station address. The address is
$08003E2xxxxx, where xxxxx is the unique 5-nibble number assigned to
the board (every board has a different value for xxxxx).
Each MVME2700 displays its Ethernet station address on a label attached
to the base board in the PMC connector keepout area just behind the front
panel. In addition, the six bytes including the Ethernet station address are
stored in the NVRAM (BBRAM) configuration area specified by boot
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Block Diagram
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TERMPWR
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