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Computing (FOLDOC) dictionary
program counter
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hardware (PC, or "instruction address register") A
register in the central processing unit that contains the
addresss of the next instruction to be executed. The PC is
automatically incremented after each instruction is fetched to
point to the following instruction. It is not normally
manipulated like an ordinary register but instead, special
instructions are provided to alter the flow of control by
writing a new value to the PC, e.g. JUMP, CALL, RTS.