instruction register

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instruction register

A high-speed circuit that holds an instruction for decoding and execution. See program counter.

instruction register [in′strək·shən ‚rej·ə·stər]

(computer science)

A hardware element that receives and holds an instruction as it is extracted from memory; the register either contains or is connected to circuits that interpret the instruction (or discover its meaning). Also known as current-instruction register.

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? References in periodicals archive

current-instruction register
fetch-execute cycle
instruction cycle

instruction pointer
instruction time
machine cycle

The instruction register (IR) holds the current instruction being executed by the computer.

Using instructional simulation in the computing curriculum by Crews, Thad / Academic Exchange Quarterly

The M300 can store up to four instructions in an internal two- level buffer that is then used to directly supply the instruction register on demand.

Motorola Debuts New M-CORE M300 Processor Family With Floating Point ... by Business Wire

Internal read visibility and load instruction register

Motorola introduces 68HC05 expanded memory microcontroller ideal for ... by Business Wire

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Instruction Set Simulator

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