Data General AViiON 4600 Series, Customer Documentation

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Getting Started
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About VMEbus Options
The VMEbus backplane printed-circuit board and card cage in an AViiON 530 or 4600
series computer unit can support one or more of the following communications
options:
•
Ċ VME Asynchronous Controller that provides as many as 16 ports for
asynchronous devices such as user terminals.
•
Ċ VME Synchronous Controller that provides as many as three
synchronous communications ports.
•
(AViiON 4600 series) Ċ VME Distributed Asynchronous host adapter
that supports as many as 255 asynchronous user devices via a network of cluster
controllers.
•
(AViiON 4600 series) Ċ VME Terminal Controller that supports as many as
255 asynchronous user devices over a standard Ethernet/IEEE 802.3 LAN.
•
Ċ VME LAN Controller with a connector for a second Ethernet LAN
transceiver. Supplements the Ethernet connection managed by the integrated LAN
controller(s) on the system board and optional I/O expansion board.
•
Ċ VME Token Ring LAN Controller that enables a system to communicate
with other computers over an IEEE 802.5 token ring local area network.
About Mass–Storage Drives
The Small Computer System Interface (SCSI) is an ANSI-defined standard for
computer and peripheral interconnection. The SCSI bus connector(s) on the computer
unit allow you to connect SCSI-based mass-storage devices to your computer system.
Each SCSI controller in your system can support as many as seven SCSI drives,
including standĆalone drives or drives residing in mass-storage housing units.
Refer to Chapter 4 for information about connecting mass-storage devices using the
external SCSI bus connectors on the computer unit rear panel.