ibbna() changes the GPIB interface board used to access the device
specified by ud
. Subsequent device level
calls using the descriptor ud
will assume
the device is connected to the interface board specified by
name
. If you wish to specify a
device's new access board by board index instead
of name, you can use the IbcBNA option of ibconfig().
The name of a board can be specified in the configuration file gpib.conf.
On success, iberr is set to the board index of the device's old access board.