| 摘要 |
PURPOSE:To easily execute a test while operating a process, by designating a process input/output instruction as a temporary operation mode at the time of a test, and writing an output in a memory area for debugging. CONSTITUTION:A microprocessor 6 executes its operation by decoding a process input/output instruction which is sent to a processor input/output device 3' through a connecting transmission line 5 from a computer 2, and giving an instruction to a process input/output device 4 through an interface 9. The process input/output instruction is provided with bits for designating a real operation mode and a temporary operation mode. When an instruction of said temporary operation mode has been given, if it is related to an input, the same operation as usual is executed. In the even of an output instruction, operation to the process input/output device is not executed, and writing to a debug memory 7 is executed. |
