Chapter 2
Hardware Configuration and Installation
© National Instruments Corp.
2-5
AT-GPIB for SCO UNIX
To change the base I/O address press each switch to the desired position,
then check each switch to make sure it is pressed down all the way.
Table 2-3 lists the possible switch settings, the corresponding base I/O
address, and the I/O address space used for that setting.
Table 2-3. Possible Base I/O Address Switch Settings for the AT-GPIB
Switch Setting
A9 A8 A7 A6 A5
Base I/O Address
(hex)
I/O Address Space
Used (hex)
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
1
0
1
0
0
280
280 to 29F
1
0
1
0
1
2A0
2A0 to 2BF
1
0
1
1
0
2C0
2C0 to 2DF
1
0
1
1
1
2E0
2E0 to 2FF
1
1
0
0
0
300
300 to 31F
1
1
0
0
1
320
320 to 33F
1
1
0
1
0
340
340 to 35F
1
1
0
1
1
360
360 to 37F
1
1
1
0
0
380
380 to 39F
(continues)