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Appendix A
Changing Hardware and Software Configuration Settings
Base I/O Address Selection
GPIB-PCII Mode
The GPIB-PCII base I/O address is set using the switches at position U2. The
switch block is used to set the address for address lines A3 through A9. The
addresses are in a consecutive block of eight beginning on any multiple of 8
between 000 and 3F8 hex. For example, for the default address, 2B8 hex, the
GPIB-PCII uses the address space 2B8 through 2BF hex.
Press the side marked 1 to select a binary value of 1 for the corresponding
address bit. Press the 0 side of the switch to select a value of 0 for the
corresponding address bit.
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.
Figure A-4 shows two possible switch settings. In this figure, the black side of
the switch is the side you press down. Each of the address selections shows how
the base I/O address was calculated from the switch positions.
© National Instruments Corp.
A-5
PCII/IIA and NI-488.2 MS-DOS
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