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Instruction Address Register

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<architecture> (IAR) The IBM name for program counter.

The IAR can be accessed by way of a supervisor call in supervisor state, but cannot be directly addressed in problem state.


Nearby terms: Institute of Electrical and Electronics Engineers, Inc. « Institut National de Recherche en Informatique et Automatique « instruction « Instruction Address Register » instructional technology » instruction mnemonic » instruction prefetch

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