On VAX or Alpha, specifies the program counter (PC) register
    containing the address of the next instruction to be executed by
    the processor. On I64, specifies the instruction bundle address
    (from the %IP register) and the slot offset within this bundle.

    VAX Examples:

    DBG> EXAMINE %PC   ! Display the value in the PC
    MOD3\%PC:  1554
     ! address of next instruction to execute

    DBG> EXAMINE %PC   ! Display the value at the address in the PC
    MOD3\%LINE 12:    MOVL B^12(R11),R1
                       ! next instruction to execute