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Chapter 3 Configuration and Installation
VXIpc-850 Series User Manual
3 - 10
© National Instruments Corporation
SCSI Termination
The VXIpc-850 uses active termin ation on the SCSI-2 bus. Because the
VXIpc-850 is always an end device, you should not need to disable the
termination; however, Figure 3-10 shows the settings for jumper W1.
W1
a. Terminate SCSI
Signals (Default)
W1
b. Do Not Terminate
SCSI Signals
Figure 3-10. SCSI Termination
GPIB Interrupt Level
You can program the GPIB interface on the VXIpc-850 to use one of
two ISA interrupts—5 or 11. Switch S8 controls which interrupt line
the GPIB interface uses. Figure 3-11 shows these settings.
S8
S8
a. GPIB Uses IRQ11 (Default)
b. GPIB Uses IRQ5
Figure 3-11. GPIB Interrupt Level
System CMOS
The VXIpc-850 contains a backed-up memory used to store BIOS
defaults and configuration information.
To clear the CMOS contents, simply short the pins of W2 as shown in
Figure 3-12b.
Warning:
You should not keep these two pins shorted because the CMOS
memory cannot be sustained when the power is turned off if these two
pins are shorted.