The present invention includes a multi-mode SCSI backplane and a detection logic
that is used in conjunction with the backplane. In this invention, the SCSI backplane
can be configured in different modes, included simplex mode and duplex mode. The
detection logic can also detect when an illegal configuration is connected to the
SCSI backplane and indicate the presence of the illegal configuration by triggering
a light emitting diode (LED) or some other indicating mechanism. The detection
logic is implemented with a handful of cost-effective field effect transistors
(FETs), resistors and LEDs and no additional IC logic gates or Programmable Array
Logic (PAL) is necessary.
