User manual

Glossary

MTBF Mean Time Between Failure

multiframe 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.

MXI-2 The second generation of the National Instruments MXIbus

product line. MXI-2 expands the number of signals on a standard

MXIbus cable by including VXI triggers, all VXI interrupts,

CLK10, SYSFAIL*, SYSRESET*, and ACFAIL*.

MXIbus Multisystem eXtension Interface Bus; a high-performance

communication link that interconnects devices using round,

flexible cables.

MXIbus System Controller A functional module that has arbiter, daisy-chain driver, and

MXIbus cycle timeout responsibility. Always the first device in

the MXIbus daisy-chain.

nonprivileged access One of the defined types of VMEbus data transfers; indicated by

certain address modifier codes. Each of the defined VMEbus

address spaces has a defined nonprivileged access mode.

Non-Slot 0 device A device configured for installation in any slot in a VXIbus

mainframe other than Slot 0. Installing such a device into Slot 0

can damage the device, the VXIbus backplane, or both. The

VXI-MXI-2 can be configured to be in either slot, or

automatically detect whether it is installed in Slot 0.

normal operating mode Contrasted with interlocked arbitration mode; in this mode there

can be masters operating simultaneously in the VXIbus/MXIbus

system. Vulnerable to deadlock situations.

onboard RAM The optional RAM installed into the SIMM slots of the

VXI-MXI-2 module.

outward cycle A data transfer cycle that maps from the VXIbus to the MXIbus.