Appendix B
Changing Board and Device Characteristics
© National Instruments Corp.
B-3
GPIB-PCII/IIA for Graphics
Note:
Do not give a GPIB device the same name as a directory or file on your
disk drive.
You can also use the configuration programs,
IBCONF
or
WIBCONF
, to examine
the current default settings in the handler file.
If you do not make changes to the configuration, the default characteristics of the
software remain in effect.
Primary Default Characteristics
The following are the primary default characteristics of the handler:
•
The GPIB-PC mode is assumed to be the default setting. See
Appendix C, Hardware and Software Configuration, for more information on
the GPIB-PC mode.
•
There are 32 active devices with symbolic names
DEV1
through
DEV32
.
•
GPIB addresses of these devices are the same as the device number. For
example,
DEV1
is at address 1.
•
The first 16 devices are assigned to
GPIB0
as their access board, and the
second 16 devices are assigned to GPIB1 as their access board.
GPIB0
is the
symbolic name of the first GPIB-PCII/IIA board in your system. If you have
an additional GPIB-PCII/IIA board in your system, its symbolic name is
GPIB1
.
•
Each GPIB-PCII/IIA is System Controller of its independent bus and has a
GPIB address of 0.
•
The END message is sent with the last byte of each data message to a device.
Each data message that is read from a device automatically terminates when
END is received. No EOS character is recognized.
•
The time limit on I/O and wait function calls is approximately 10 seconds.
•
GPIB0
is a GPIB-PCII board at base I/O address 02B8 hex using DMA
channel 1 and no interrupt line, or
GPIB0
is a GPIB-PCIIA board at base I/O
address 02E1 hex using DMA channel 1 and no interrupt line.
