Chapter 2
Hardware Configuration and Installation
© National Instruments Corporation
2-5
VXI-AT2000/NI-VXI MS-DOS Getting Started
Table 2-2 lists the 24 possible switch settings, the corresponding base I/O address, and the I/O
address space used for that setting. Notice that the base address settings that correspond to an
I/O address in the range from 0 to FF hex are not listed. These addresses are used by logic on the
PC AT motherboard and cannot be used by I/O adapter modules.
Table 2-2. Possible Base I/O Address Settings for the AT-MXI
Switch Setting
Base I/O Address
I/O Ports Used
A9 A8 A7 A6 A5
(hex)
(hex)
0 1 0 0 0
100
100 - 11F
0 1 0 0 1
120
120 - 13F
0 1 0 1 0
140
140 - 15F
0 1 0 1 1
160
160 - 17F
0 1 1 0 0
180
180 - 19F
0 1 1 0 1
1A0
1A0 - 1BF
0 1 1 1 0
1C0
1C0 - 1DF
0 1 1 1 1
1E0
1E0 - 1FF
1 0 0 0 0
200
200 - 21F
1 0 0 0 1
220
220 - 23F
1 0 0 1 0
240
240 - 25F
1 0 0 1 1
260
260 - 27F
1 0 1 0 0
280
280 - 29F
1 0 1 0 1
2A0
2A0 - 2BF
1 0 1 1 0
2C0
2C0 - 2DF
1 0 1 1 1
2E0
2E0 - 2FF
1 1 0 0 0
300
300 - 31F
1 1 0 0 1
320
320 - 33F
1 1 0 1 0
340 (default)
340 - 35F
(continues)