| 摘要 |
PURPOSE:To hold the internal state information in a main routine executed just before in the execution of a subroutine and to make the analysis of a failure easy, by providing a hold flip-flop. CONSTITUTION:During the execution of a subroutine, a hold flip-flop 9 is set and the internal state information stored in a tracer memory input buffer 2 is stored, internal state information 21 written in a tracer memory 3 is internal state information 20 at a subroutine call instruction and when the tracer memory 3 is read out, a main routine can easily be known. When the state of execution of the subroutine is required, a hold condition register 10 is reset, an a hold condition signal is not outputted, then the newest internal state information is always stored in the buffer 2. |
