| 摘要 |
PURPOSE:To shorten the occupation time of a bus line to make a high-speed transfer possible, by making instruction words and data, which are required for the execution of a CPU, compact and storing preliminarily them in a cache memory. CONSTITUTION:When A CPU 1 sends a start signal to a DMA device 4, the transfer of the output signal from an A/D converter to a main memory 3 through a bus line 6 is started. When the CPU1 sends the start signal to an auxiliary storage device 5, data having a designated size is transferred from the main memory 3 to the device 5 through the bus 6. A program is made small- sized so that contents of the main memory 3 which the CPU1 refers to are stored in a cache memory 2 and are executed while devices 4 and 5 are in the course of data transfer; and thus, the time when the bus 6 required for data transfer is occupied becomes shorter to make high-speed analog scanning possible. |
