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Glossary
NI-VXI User Manual G-8 © National Instruments Corporation
IEEE 488.2 A supplemental standard for GPIB. Its full title is Codes, Formats,
Protocols and Common Commands.
INT16 A 16-bit signed integer; may also be called a short integer or word.
INT32 A 32-bit signed integer; may also be called a long or longword.
INT8 An 8-bit signed integer; may also be called a char.
interrupt A means for a device to notify another device that an event occurred.
interrupt handler A functional module that detects interrupt requests generated by
interrupters and performs appropriate actions.
interrupter A device capable of asserting interrupts and responding to an interrupt
acknowledge cycle.
INTX Interrupt and Timing Extension; a daughter card option for MXI
mainframe extenders that extends interrupt lines and reset signals on
VME boards. On VXI boards it also extends trigger lines and the
VXIbus CLK10 signal.
K
KB 1,024 or 2
10
kilobyte A thousand bytes.
L
LF Linefeed; the ASCII character 0Ah.
logical address An 8-bit number that uniquely identifies the location of each VXIbus
device’s configuration registers in a system. The A16 register address
of a device is C000h + Logical Address * 40h.
longword Data type of 32-bit integers.
Longword Serial A form of Word Serial communication in which Commanders and
Protocol Servants communicate with 32-bit data transfers instead of 16-bit data
transfers as in the normal Word Serial Protocol.
low-level Programming at the system level with machine-dependent commands.