| 摘要 |
<p>PURPOSE:To simplify the program of a debugging handler and to speed up a processing by making accessing to a debugged system with respect to only an instruction which specifies and makes access to the space of physical space or the like while the debugging handler is processed. CONSTITUTION:When an instruction decoder 11 analyzes the instruction fetched from outside and a system shifts to the debugging handler processing by the detection of the debugging phenomenon of a trace and a brake point, a mode designation flag 14 is set. Consequently, a general memory access makes access to a resource in a debugging supporting system while the flag 14 is set. When the space of instruction or the like, which makes access to the physical space, is designated and made accessed, an instruction signal 103 from a micro program 12 is inverted in an inverter 15. A signal which is impressed on an AND gate and makes access to the debugging support system is temporarily stopped. Consequently, the access of the debugged or debugging support system can be switched only by selecting the instruction without rewriting a mode.</p> |
