Datasheet

Glossary of Terms and Abbreviations Glossary-5
Superscalar machine. A machine that can issue multiple instructions
concurrently from a conventional linear instruction stream.
Supervisor mode. The privileged operation state of a processor. In
supervisor mode, software, typically the operating system, can
access all control registers and can access the supervisor memory
space, among other privileged operations.
System memory. The physical memory available to a processor.
Tenure. A tenure consists of three phases: arbitration, transfer, termination.
There can be separate address bus tenures and data bus tenures.
Throughput. The measure of the number of instructions that are processed
per clock cycle.
Transfer termination. The successful or unsuccessful conclusion of a data
transfer.
Underflow. A condition that occurs during arithmetic operations when the
result cannot be represented accurately in the destination register.
User mode. The operating state of a processor used typically by application
software. In user mode, software can access only certain control
registers and can access only user memory space. No privileged
operations can be performed.
Word. A 16-bit data element.
Write-through. A cache memory update policy in which all processor write
cycles are written to both the cache and memory.
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