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Adapter for Connecting and Terminating Mixed Bus Widths

IP.com Disclosure Number: IPCOM000122982D
Original Publication Date: 1998-Mar-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 2 page(s) / 72K

Publishing Venue

IBM

Related People

Kulich, AJ: AUTHOR

Abstract

Disclosed is a small computer system interface (SCSI) adapter to attach a two-byte wide SCSI bus to a one-byte wide SCSI bus. The use of standard SCSI cables and terminator are used to attach the buses to the adapter. With the adapter and standard SCSI components, correct cabling and termination of the high order data signals, DB(8-15, P1), is ensured.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 72% of the total text.

Adapter for Connecting and Terminating Mixed Bus Widths

      Disclosed is a small computer system interface (SCSI) adapter
to attach a two-byte wide SCSI bus to a one-byte wide SCSI bus.  The
use of standard SCSI cables and terminator are used to attach the
buses to the adapter.  With the adapter and standard SCSI components,
correct cabling and termination of the high order data signals,
DB(8-15, P1), is ensured.

      The SCSI adapter described here will consist of three
components.  These components and how they are connected will convert
a two-byte wide SCSI bus to a one-byte wide SCSI bus using standard
SCSI cables and terminate the high order data signals, DB(8-15, P1),
of the two-byte wide SCSI bus with a standard SCSI terminator.

      Attachment to the two-byte wide SCSI bus is made with a
standard 68 contact high-density device connector, connector one.
Termination of the high order data signals of the two-byte wide SCSI
bus is supplied by a standard two-byte wide SCSI terminator attached
to a second 68 contact high-density device connector, connector two.
This connector should be labeled to indicate it is for attachment
of the terminator to ensure correct cabling.  The attachment to the
one-byte wide SCSI bus is made using a standard 50 contact
low-density cable connector, connector three.

      Connections are made between connectors one and three to supply
all signals needed by the one-byte wide SCSI bus.  The appropriate
data signals,...