National Instruments GPIB-PC - Manual (Page 254)

Glossary
GPIB-PC User Manual G-6 ©National Instruments Corp.
PPC or PARALLEL POLL CONFIGURE - A GPIB command used to
configure an addressed Listener to participate in polls.
PPD or PARALLEL POLL DISABLE - A GPIB command used to
disable a configured device from participating in polls. There are
16 PPD commands.
PPE or PARALLEL POLL ENABLE - A 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 or PARALLEL POLL UNCONFIGURE - A GPIB command used to
disable any device from participating in polls.
PROGRAMMED I/O - Low speed data transfer between the GPIB-PC
and memory in which the CPU moves each data byte according to
program instructions. See DMA.
REN or REMOTE ENABLE - A GPIB line controlled by the System
Controller but used by the CIC to place devices in remote program
mode.
ROOT DIRECTORY - The top level directory on a floppy or hard disk.
SDC or SELECTED DEVICE CLEAR - A GPIB command used to reset
internal or device functions of an addressed Listener. See DCL and
IFC.
SERIAL POLL - The process of polling and reading the status byte of
one device at a time. See Parallel Poll.
SOFT BOOT - See Boot.
SOURCE HANDSHAKE - The GPIB interface function that transmits
data and commands. Talkers use this function to send data and the
Controller uses it to send commands. See Acceptor Handshake and
Handshake.
SPD or SERIAL POLL DISABLE - A GPIB command that cancels a
SPE command.
SPE or SERIAL POLL ENABLE - A GPIB command used to enable a
specific device to be polled. That device must also be addressed to
talk. See SPD.