National Instruments GPIB-PC - Manual (Page 59)

GPIB-PC Functions — Introduction Section Three
GPIB-PC User Manual 3-16 ©National Instruments Corp.
IBPPC (bd,v)
IBPPC locally configures or unconfigures the board for parallel polls.
IBIST (bd,v)
IBIST sets or clears the board's parallel poll flag (also known as the
individual status bit).
IBWAIT (bd,mask)
This function is described in Group IV. It is included here to describe
the additional events associated with noncontroller operations that the
function can detect. These include being triggered (DTAS) or cleared
(DCAS) by the controller, being placed in remote programming mode
(REM) by the controller, or being placed in a lockout state (LOK) by
the controller.