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Chapter 2
Installation and Configuration
2-10
©
National Instruments Corporation
Figure 2-6. AT-GPIB/TNT Base I/O Address Switch Settings
Configure the AT-GPIB/TNT Interrupt Request
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 GPIB hardware and software use
interrupts to get service from the CPU when necessary. By default, the
AT-GPIB/TNT is configured to use interrupt request line 11.
Note:
If there are no interrupt lines available for your GPIB hardware, the
jumpers that set the interrupt request line have no effect. You can leave
them at the default setting.
1
9
8
7
6
5
0
Binary
1
1
0
0
0
0
0
0
0
0
Hex
3
0
0
Push this side down (OFF) for logic 1
Push this side down (ON) for logic 0
1
9
8
7
6
5
0
Binary
1
0
1
1
0
0
0
0
0
0
Hex
2
C
0
Switch Set to Base I/O
Address hex 300
Switch Set to Default
Base I/O Address hex 2C0
OFF
5
4
3
2
1
OFF
5
4
3
2
1