| 摘要 |
PURPOSE:To allow each software to select the execution of the same processing routine at the time of starting a software interruption processing routine by controlling the execution of each software interruption processing based on a condition code stored in a register. CONSTITUTION:A general register array 1 has a condition code register 1a for holding a condition code suppressing the execution of the same processing routine of each software interruption processing after the end of the execution of the same processing routine. A software interruption control circuit 10 operates a vector table address in accordance with the operand of an operation code of an instruction outputted from an instruction decoder 8 and written in a memory 4 and transfers its processing to a software interruption routine. in addition, the circuit 10 controls the execution of each software interruption processing based on the condition code stored in the register 1a. |
