| 摘要 |
PURPOSE:To prevent the illegal use of a program through reproduction by processing part of instructions to be processed by a host CPU at a service processor SVP. CONSTITUTION:A host computer 100 consists of a primary processor 101 and a main memory 102. The processor 101 reads successively instructions out of the memory 102 and sets them to an instruction register 30. Then the instruction code part of said instruction is decoded by a decoder 31 for execution. When a special instruction is detected by the decoder 31, the processor 101 stops its actuation and gives an interruption to an SVP200 via an interruption interface 50. The SVP200 scans out the register 30 of the processor 101 and transfers the prescribed part of a program to a memory 202 of the SVP200 to execute it on the SVP200. |
