Glossary
NI-488.2 User Manual for Windows G-6 www.natinst.com
N
NDAC Not Data Accepted. One of the three GPIB handshake lines. See handshake.
NRFD Not Ready For Data. One of the three GPIB handshake lines.
See handshake.
P
parallel poll The process of polling all configured devices at once and reading a
composite poll response. See serial poll.
PC Personal computer.
PCI Peripheral Component Interconnect.
PIO See programmed I/O.
PPC Parallel Poll Configure. The GPIB command used to configure an
addressed Listener to participate in polls.
PPD Parallel Poll Disable. The GPIB command used to disable a configured
device from participating in polls. There are 16 PPD commands.
PPE Parallel Poll Enable. The GPIB command used to enable a configured
device to participate in polls and to assign a DIO response line. There
are 16 PPE commands.
PPU Parallel Poll Unconfigure. The GPIB command used to disable used to
disable any device from participating in polls.
programmed I/O Low-speed data transfer between the GPIB interface and memory in
which the CPU moves each data byte according to program instructions.
See DMA.
R
resynchronize The GPIB software and the user application must resynchronize after
asynchronous I/O operations have completed.
RQS Request Service.