| 摘要 |
PURPOSE:To reduce the occupying time of a CPU, by a method wherein the results of an exclusive OR and an OR of a memory means are ORed with a computing means and the contents of the memory means is updated by the results of the ORing to judge changing condition of input data from the contents of the memory means. CONSTITUTION:An address switch 4 is changed by a control means 65 of a CPU 6 to turn an input data 1A to an address 4A of a memory 5 and 1 to be added to an input 8 is written into the memory 5. Then, a sampling pulse 7 is changed over to a lead pulse of a CPU 6, the memory 5 changed to the lead mode and an address 6A to be fed from an address generating means 61 of the CPU 6 with the switching 4 is turned to an address 4A. Then, the memory 5 is read out starting from a head address. Then, an address 6A at which the output 9 of the memory 5 gives 1 is detected 66 and the address 6A at which the output 9 first gives 1 is memorized 62. Then, each time the output 9 gives 1, an exclusive OR is computed 64 between the current address 6A and the means 62 and the exclusive OR and OR of a memory means 63 are ORed by a computing means 64 and changing condition of an input data is judged from the contents of the means 64 updated by the result. |
