Glossary
© National Instruments Corporation
Glossary-5
VXIpc-486 Model 500 Series
N
nonprivileged
One of the defined types of VMEbus data transfers; indicated by certain
access
address modifier codes. Each of the defined VMEbus address spaces has
a defined nonprivileged access mode.
P
PC AT
Personal Computer Advanced Technology
PRI
Priority
privileged access
See supervisory access.
R
RAM
random-access memory
Register-Based
A Servant-only device that supports VXIbus configuration registers.
device
Register-Based devices are typically controlled by Message-Based devices
via device-dependent register reads and writes.
Resource Manager
A Message-Based Commander located at Logical Address 0, which
provides configuration management services such as address map
configuration, Commander and Servant mappings, and self-test and
diagnostic management.
RONR
Request On No Request
ROR
Release On Request; a type of VMEbus arbitration where the current
VMEbus master relinquishes control of the bus only when another bus
master requests the VMEbus.
RRS
Round Robin Select
RWD
Release When Done
S
s
seconds
Servant
A device controlled by a Commander.
statically
A device for which the logical address cannot be set through software; that
configured device
is, it is not dynamically configurable.