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Glossary
Glossary–4
VX1410A & VX1420A IntelliFrame Mainframe Instruction Manual
Extended Self Test
Any self test or diagnostic power-on routine that executes after the initial
kernel self test program.
External System Controller
The host computer or other external controller that exerts overall control
over VXIbus operations.
IACK Daisy Chain Driver
The circuit that drives the VMEbus Interrupt Acknowledge daisy chain line
that runs continuously through all installed modules or through jumpers
across the backplane.
ID-ROM
An NVRAM storage area that provides for non-volatile storage of diagnostic
data.
Instrument Module
A plug-in printed circuit board, with associated components and shields, that
may be installed in a VXIbus mainframe. An instrument module may
contain more than one device. Also, one device may require more than one
instrument module.
IntelliFrame Mainframe
A family of VXI mainframes from Tektronix that automatically direct
airflow to the installed modules, have an autoconfigure backplane, have
adjustable rack kits and cable trays (optional), and can be upgraded.
IntelliGuides
The card guides used in the IntelliFrame Mainframe. The card guides on the
bottom of the mainframe shut off airflow when no modules are installed in
the respective slots.
Interface Device
A VXIbus device that provides one or more interfaces to external equipment.
Interrupt Handler
A functional module that detects interrupt requests generated by Interrupters
and responds to those requests by requesting status and identity information.
Interrupter
A device capable of asserting VMEbus interrupts and performing the
interrupt acknowledge sequence.
IRQ
The Interrupt ReQuest signal, which is the VMEbus interrupt line that is
asserted by an Interrupter to signify to the controller that a device on the bus
requires service by the controller.