National Instruments NI-488.2 User Manual page 118

Glossary
C
CFE
CFGn
CIC
CPU
D
DAV
DCL
device-level function
DIO1 through DIO8
DLL
DMA
driver
E
END or END Message
EOI
NI-488.2 User Manual for Windows
Configuration Enable. The GPIB command which precedes CFGn and is
used to place devices into their configuration mode.
These GPIB commands (CFG1 through CFG15) follow CFE and are used
to configure all devices for the number of meters of cable in the system so
HS488 transfers occur without errors.
Controller-In-Charge. The device that manages the GPIB by sending
interface messages to other devices.
Central processing unit.
Data Valid. One of the three GPIB handshake lines. See handshake.
Device Clear. The GPIB command used to reset the device or internal
functions of all devices. See SDC.
A function that combines several rudimentary board operations into one
function so that the user does not have to be concerned with bus
management or other GPIB protocol matters.
The GPIB lines that are used to transmit command or data bytes from one
device to another.
Dynamic link library.
Direct memory access. High-speed data transfer between the GPIB board
and memory that is not handled directly by the CPU. Not available on some
systems. See programmed I/O.
Device driver software installed within the operating system.
A message that signals the end of a data string. END is sent by asserting
the GPIB End or Identify (EOI) line with the last data byte.
A GPIB line that signals either the last byte of a data message (END) or
the parallel poll Identify (IDY) message.
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