National Instruments NI-488.2 - Manual (Page 123)

Glossary
NI-488.2 User Manual G-6 ni.com
N
NDAC Not Data Accepted—One of the three GPIB handshake lines.
See also
handshake .
NRFD Not Ready For Data—One of the three GPIB handshake lines.
See also
handshake .
P
parallel poll The process of polling all configured devices at once and reading
a composite poll response. See also
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 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 also
DMA .
R
resynchronize When the driver indicates to the application that asynchronous I/O
operations have completed.
RQS Request Service.