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AM-6060 Computer Owner's Manual, Rev. 00
Appendix D - SCSI Termination
The preferred way to terminate the SCSI bus in an AMOS based computer is the installation of an
external terminator. Using an external terminator makes installing an add-on subsystem (like a portable
CD-ROM drive) easier, eliminating the need to remove terminators from a SCSI device located in the
host computer. In the AM-6060, the external terminator must be an “active” terminator. An active
terminator is included with your AM-6060.
The AM-176 board is sensitive to incorrect SCSI bus termination. If you are using the external
terminator and one of the SCSI devices inside the computer also has its terminators installed, you
will experience problems.
The SCSI bus must be terminated at each end of the cable. The AM-176 terminates one end of the bus.
The other end must be terminated by an active style external terminator. The correct type of active
terminator for your computer—either narrow (PRA-00222-21) or wide (PRA-00222-20)—is included
with the AM-6060.
To use the external terminator, make sure none of the SCSI peripherals inside the computer are
terminated. The termination power for the SCSI bus is provided by the AM-176 board.
The external terminator is shown in Figure D-1:
PRA-00222-20
EXTERNAL SCSI BUS
TERMINATOR
SCSI CONNECTOR
ON BACK PANEL
Figure D-1: Active External Terminator Installation