| 摘要 |
PURPOSE:To execute an arbitrary command at the same speed as the execution of a previously internally incorporated command by providing a command selecting means for supplying a sub-command stored in a sub-command table to a microprogram control means based on a control command. CONSTITUTION:A sub-command table CTBL in which an internal data processing sub-command by a microprogram control means can be programmably stored and a sub-parameter table PTBL in which a sub-parameter required for executing the sub-command can be programmably stored are provided. Based on the control command, the required sub-command and the sub- parameter are supplied to the microprogram control means from the table and the desired internal data processing can be executed only by externally receiving the control command for instructing an operation start by a prescribed sub-command programmably set to a peripheral controller. Thereby, the arbitrary command can be executed at high speed equal to the execution speed of the previously internally incorporated command. |
