Appeal No. 2000-2207
Application No. 08/968,379
terminator at an internal end of the SCSI bus, and an internal
switchable terminator at an external end of the SCSI bus. If the
internal switchable terminator senses that any external SCSI
peripheral devices or an external terminator are connected to the
SCSI bus, the internal switchable terminator does not terminate
the SCSI bus on the external side. If no external SCSI devices
or an external terminator are attached to the bus, then the
internal switchable terminator terminates the SCSI bus on the
external end.
Claim 23 is illustrative of the invention and reads as
follows:
23. A bus system for use in a computer system having
an external periphery comprising:
a small computer standard interface (SCSI) bus
including a plurality of bus signal lines, the SCSI bus
having an internal connector terminated by a fixed
termination and a multi-pin external connector mounted to
the external periphery of the computer system to interface
with a removable, external termination device; and
an apparatus coupled to each of the plurality of bus
signal lines to automatically enable termination of the bus
signal lines of the SCSI bus in parallel at the external
connector when the external termination device is
disconnected from the SCSI bus, the apparatus including
a sensing line coupled to a pin of the external
connector, the sensing line to sense whether the external
termination device is coupled to the SCSI bus, the sensing
line being common to the bus signal lines,
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