| 摘要 |
PURPOSE:To facilitate the analysis of the factor of a fault by storing the contents of a status register in a memory every time the change of the register contents is detected when an instruction is processed by an information processor. CONSTITUTION:A status register 3 holds the prescribed information showing the operating states including e fault state. A detecting part 4 detects the change of the holding contents of the register 3. A status stack area 51 is included in a memory 5, and a control part 2 controls a system via a data bus 1. When an information processor processes an instruction, the part 2 controls the memory 5 and stacks the holing contents of the register 3 in the area 51 together with the holding contents so far stored in terms of time series every time the part 4 detects the change of the contents of the register 3. |
