| 摘要 |
PURPOSE:To detect easily an error of a program and to improve the reliability in test by recording the address of an input/output space or a memory which is accessed from a microprocessor, etc. to a program which works in real time. CONSTITUTION:When a processor 10' to be tested accesses a certain address, ''0'' is written to the storage place of a RAM50'A corresponding to said address via a data input terminal DI. Thus ''0'' is written to the RAM50'A serving as an access monitor and the address receiving no access is kept to ''1'' for the memory address receiving an access from the processor 10'. Therefore all bits of an access memory are cleared to ''1'' before the execution of a program to be tested, and the contents of the RAM50'A are checked after the execution of said program. Thus the memory address received an access is known easily since the memory address is set to ''0'' after the processor 10' executed a test program. |
