National Instruments 800 Series 사용자 설명서
Chapter 3
VXIpc 800 Series Configuration and Installation
3-12
© National Instruments Corporation
System CMOS
The VXIpc-800 contains a backed-up memory used to store BIOS
defaults and configuration information.
defaults and configuration information.
To clear the CMOS contents, simply short the pins of W2 as shown in
Figure 3-12b.
Figure 3-12b.
Caution:
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.
cannot be sustained when the power is turned off if these two pins are
shorted.
Figure 3-12. System CMOS
Parallel Port DMA Level
You can use jumper W4 to configure the parallel port for either DMA
level 1 or DMA level 3. Refer to Figure 3-13 for the jumper settings.
level 1 or DMA level 3. Refer to Figure 3-13 for the jumper settings.
Figure 3-13. Parallel Port DMA Channel
!
a. Normal Operation
(Default)
b. Clear CMOS
Contents
W2
W2
a. Parallel Port Uses DMA
Channel 1 (Default)
b. Parallel Port Uses
DMA Channel 3
W4
W4