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Chapter 2
Installation and Configuration
2-8
©
National Instruments Corporation
Follow these steps to reconfigure the base I/O address of the
AT-GPIB/TNT:
1.
Locate the base I/O address switch at SW1 on your AT-GPIB/TNT
board. Refer to the parts locator diagram, Figure 2-5.
2.
Change the switch settings to configure the GPIB board to match
the base I/O address of the Input/Output Range assigned by
Windows.
Press down on the side marked OFF to select a binary value of 1 for
the corresponding address bit. Press down on the ON side of the
switch to select a binary value of 0. Refer to Figure 2-6 for an
example of the switch settings and corresponding base I/O
addresses. Table 2-2 shows the possible switch settings, the
corresponding base I/O addresses, and the I/O address space used
for each setting. The default settings are in bold italics.
Table 2-2. Possible Base I/O Address Switch Settings for AT-GPIB/TNT
Switch Setting
Base I/O
Address (hex)
I/O Address
Space Used (hex)
A9
A8
A7
A6
A5
0
1
0
0
0
100
100 to 11F
0
1
0
0
1
120
120 to 13F
0
1
0
1
0
140
140 to 15F
0
1
0
1
1
160
160 to 17F
0
1
1
0
0
180
180 to 19F
0
1
1
0
1
1A0
1A0 to 1BF
0
1
1
1
0
1C0
1C0 to 1DF
0
1
1
1
1
1E0
1E0 to 1FF
1
0
0
0
0
200
200 to 21F
1
0
0
0
1
220
220 to 23F
1
0
0
1
0
240
240 to 25F
1
0
0
1
1
260
260 to 27F