| 摘要 |
PURPOSE:To raise remarkably the operation efficiency of a system, by transmitting a dummy signal of quantity corresponding to the processing capacity of plural input/output devices. CONSTITUTION:By an operation control of a microprocessing device MPU, first of all, the processing capacity is inquires to each device, and its response is stored in a register R-A. Subsequently, the device MPU sets an instruction to be sent to a high speed input/output device I/O1, to a data setting register R-B, and sets a corresponding dummy quantity ''1'' to a counter CNT. In this case, a countact of a switching circuit SW is set to the side (a) and the instruction is sent to a transmission line TL. Subsequently, the contact is set to (b), and a dummy signal stored in a high speed I/O device dummy register R/D is sent out to a transmission line TL. Also, in case when the device I/O is for medium and low speed use, a counting value of the corresponding counter CNT is set from the register R-A, so that a data is sent, following a dummy quantity of ''5'', for instance, of 5 times of that in case of a high speed ''1''. |
