| 摘要 |
PURPOSE:To produce an interruption to stop the execution of a program when a development progarm has an access to an access inhibition area, by providing a program key and an execution program level store area for each program. CONSTITUTION:The program key PK of a relevant area stores previously 1-3 in response to the levels of data on segments 101-104 respectively. In this case, however, a program Pm103 whicn is performing the debug is set at 0. While the level of the program carrying out the debug is stored to a program level flag 201 for execution of the Pm103. Here a PKm203 is set at 00 and therefore no INt signal 205 nor JUMP signal 206 are produced regardless of a program level Pl flag 201. If a bug exists in a program with a jump given to another segment, the signal INT205 is produced according to the PL of the jumping destination and when the PL is higher than the level of the flag 201. Thus the program actuation is stopped for prevention of the data destruction. |
