National Instruments 321042A-01 Manual De Usuario

STD/STD32 computers have a segment of address space reserved for input and output.
This segment is referred to as the I/O address space.  The base I/O address of an
STD/STD32 module such as the STD-GPIB is the first position in the I/O address space
occupied by the STD/STD32 module.

By default, the STD-GPIB is configured to use base I/O address 2C0 hex.  With this
setting, the module uses the I/O address space 2C0 hex through 2DF hex.  If this address
range is already in use by another device or if you are installing more than one
STD -GPIB, follow these steps to reconfigure the base I/O address setting.

1.

Choose a new base I/O address setting.

You can configure the base I/O addresses to any setting between 0x100 and 0x3E0
that is a multiple of 0x20 hex.  If you are installing more than one STD-GPIB, each
module must use a unique base I/O address.

Table 2-2 lists 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

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

(continues)