| 摘要 |
PURPOSE:To obtain the desired processing capacity without increasing the capacity of an interface register for the debug, etc., by realizing the decision whether or not the contents stored in the interface register shows the address of a main storage device for the interruption bit. CONSTITUTION:When an interruption bit is set, the fact that a command is stored in a command register 7 or the address storing the command within a main storage device 2 is shown to the bit. A subprocessor detects an interruption; and if the bit contents shows the former fact, the contents of the register 7 are read. Then a prescribed process is carried out based on a working program of a substorage device, and the result of this process is sent to a main processor 1. In the case of the latter fact, the subprocessor reads the command at the position of the address of a register 7 through a DMA controlling circuit 6 to carry out a prescribed process. In such way, this control method is effective for the setting of a number of command parameters in case the number of commands is numerous to be stored in the register 7 and in the case of the debug in particular. |
