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Status Word Conditions
REM (brd)
REM indicates whether the board is in the remote state. REM is set whenever
the Remote Enable (REN) GPIB line is asserted and the GPIB board detects that
its listen address has been sent either by the GPIB board or by another
Controller. REM is cleared in the following situations:
•
When REN becomes unasserted.
•
When the GPIB board as a Listener detects that the Go to Local (GTL)
command has been sent either by the GPIB board or by another Controller.
•
When the ibloc function is called while the LOK bit is cleared in the
status word.
CIC (brd)
CIC indicates whether the GPIB board is the Controller-In-Charge. CIC is set
when the SendIFC routine or ibsic function is executed while the GPIB
board is System Controller or when another Controller passes control to the
GPIB board. CIC is cleared whenever the GPIB board detects Interface Clear
(IFC) from the System Controller or when the GPIB board passes control to
another device.
ATN (brd)
ATN indicates the state of the GPIB Attention (ATN) line. ATN is set whenever
the GPIB ATN line is asserted and cleared when the ATN line is unasserted.
TACS (brd)
TACS indicates whether the GPIB board is addressed as a Talker. TACS is set
whenever the GPIB board detects its talk address (and secondary address, if
enabled) has been sent either by the GPIB board itself or by another Controller.
TACS is cleared whenever the GPIB board detects the Untalk (UNT) command,
its own listen address, a talk address other than its own talk address, or Interface
Clear (IFC).
NI-488.2M SRM for OS/2
A-4
© National Instruments Corp.
Appendix A
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