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M
MB
m
Mainframe Extender A device such as the VXI-MXI that interfaces a VXIbus mainframe to an
Mapping
Master
Master-Mode
Operation
MBytes/s
Memory Device
Message-Based
Device
MODID
MSB
MTBF
Multiframe
MXIbus
MXIbus System
Controller
© National Instruments Corporation
megabytes of memory
meters
interconnect bus. It routes bus transactions from the VXIbus to the
interconnect bus or vice versa. A mainframe extender has a set of registers
that defines the routing mechanisms for data transfers, interrupts, triggers,
and utility bus signals, and has optional VXIbus Slot 0 capability.
Establishing a range of address space for a one-to-one correspondence
between each address in the window and an access in VXIbus memory.
A functional part of a MXI/VME/VXIbus device that initiates data
transfers on the backplane. A transfer can be either a read or a write.
A device is in master mode if it is performing a bus cycle.
One million bytes per second; a measure of data transfer rate.
A VXIbus device that not only has configuration registers, but also has
memory that is accessible through addresses on the VME/VXI data
transfer bus.
An intelligent device that implements the defined VXIbus registers and
communication protocols. These devices are able to use Word Serial
Protocol to communicate with one another through communication
registers.
A set of signal lines on the VXI backplane that VXI systems use to
identify which modules are located in which slots in the mainframe.
Most Significant Bit (bit 15 in a 16-bit register)
Mean Time Between Failure
A system consisting of more than one mainframe connected together to act
as one; it can have multiple Slot 0 devices but only one global Resource
Manager.
Multisystem eXtension Interface Bus; a high-performance communication
link that interconnects devices using round, flexible cables.
A functional module that has arbiter, daisy-chain driver, and MXIbus
cycle timeout responsibility. Always the first device in the MXIbus
daisy-chain.
Glossary-7
Glossary
VXI-MXI User Manual
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