| 摘要 |
PROBLEM TO BE SOLVED: To easily and accurately observe information required for debug from outside by selectively giving CPU operation trace information and inner bus information to trace information output pins. SOLUTION: An inner bus signal indicating software 30a is newly installed in a computer 30, hence a CPU operation trace information indicating software and the inner bus signal indicating software 30a are started to display data read from a data storing memory 20b on a computer screen, thereby displaying signal values on an inner bus 3 with the time axis coincident with the CPU operation trace information. The operation state of a CPU core 2 and signal values on the inner bus 3 are parallel displayed in a parallel operation of the CPU core 2 and a direct access controller (DMAC), thereby enabling the debugging, which had been unable to perform display in the prior art. |
