Chapter 2 Hardware Installation and Configuration
© National Instruments Corporation
2-7
AT-FBUS for Windows NT
2.
Locate the memory base address switch on your AT-FBUS board.
Refer to Figure 2-3, AT-FBUS/2 Parts Locator Diagram.
3.
Change the switch settings to configure the AT-FBUS board to the
new memory base address as shown in Table 2-2. See Figure 2-4 for
the default switch settings.
OFF
6
4
3
2
15
Push this side down for (ON)
Push this side down for (OFF)
Figure 2-4. Memory Base Address Switch Settings for 0D0000
4.
Record your new settings on the Hardware and Software
Configuration Form in Appendix B, Customer Communication, for
future reference.
Selecting the Interrupt Request Line
PC AT-compatible computers have a series of interrupt lines available to
devices. Devices use interrupts to get immediate service from the CPU
for asynchronous events. Your AT-FBUS board and the NI-FBUS
software use interrupts to get service from the CPU when necessary.
If there are no interrupt request lines available in your system, you can
configure the AT-FBUS not to use interrupts by removing the jumper
completely. If you remove the jumper, NI-FBUS periodically polls your
board.
By default, the AT-FBUS board uses interrupt request line 11. Figure 2-5
shows the setting for IRQ11.
