Glossary
VXI-AT2000/NI-VXI MS-DOS Getting Started
Glossary-6
© National Instruments Corporation
P
PC AT
Personal Computer Advanced Technology
propagation
The transmission of signal through a computer system.
R
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.
RESMAN
The name of the National Instruments Resource Manager in NI-VXI bus
interface software. See Resource Manager.
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.
RM
See Resource Manager.
S
s
seconds
Servant
A device controlled by a Commander; there are Message-Based and
Register-Based Servants.
Shared Memory
A communication protocol that uses a block of memory that is accessible
Protocol
to both a client and a server. The memory block operates as a message
buffer for communications.
slave
A functional part of a MXI/VME/VXIbus device that detects data transfer
cycles initiated by a VMEbus master and responds to the transfers when
the address specifies one of the device's registers.
slave-mode
A device is in slave mode it if is responding to a bus cycle.
operation
Slot 0 device
A device configured for installation in Slot 0 of a VXIbus mainframe.
This device is unique in the VXIbus system in that it performs the
VMEbus System Controller functions, including clock sourcing and
arbitration for data transfers across the backplane. Installing such a device
into any other slot can damage the device, the VXIbus backplane, or both.
statically
A device whose logical address cannot be set through software; that is,
configured device
it is not dynamically configurable.
SYSFAIL
A VMEbus signal that is used by a device to indicate an internal failure.
A failed device asserts this line.
