Appendix C
Hardware and Software Configuration
© National Instruments Corp.
C-9
GPIB-PCII/IIA for Graphics
To change the base I/O address, locate the switches at U2, press each switch to
the desired position, and check each switch to make sure it is pressed down all
the way.
If you change the base I/O address setting from the default setting, record the
new setting on the GPIB-PCII/IIA Hardware and Software Configuration Form
in Appendix E, Customer Communication. Remember that you must run the
IBDIAG
diagnostic program and configure the software, as explained later in
this appendix, after you change any hardware configuration settings.
Possible Conflicts
Table C-3 lists some of the I/O addresses used by other PC plug-in interface
boards and adapters. This is not a complete list, but it may help in determining
possible address conflicts. Symptoms of I/O address conflicts vary widely. At
one extreme, conflicts can prevent the computer from booting. At the other
extreme, they can cause problems that do not surface until a considerable
amount of time has elapsed. When conflicts do surface, the problems can
exhibit themselves simply as strange behavior.
National Instruments has made every effort to select a default base I/O address
that will work. However, because of the numerous different interface boards
available for use in the PC, it is not possible to select a base I/O address that is
guaranteed to work in all systems.
Note:
In GPIB-PCII mode, eight consecutive addresses are used, while in
GPIB-PCIIA mode, sixteen addresses spread throughout the upper
address space are used.
