| 摘要 |
PURPOSE:To constitute an instruction retry system where the amount of hardware to realize the instruction retry is reduced as much as possible to perform the instruction retry in the widest range till the occurrence of write processing in one macro instruction. CONSTITUTION:A flip flop A which is set by a micro instruction and is reset by recognition of the end of a software instruction and indicates the write to registers and memories and a flip flop B which is set and reset in the same manner as the flip flop A but is not reset by the end of a preparation routine for instruction retry and indicates the instruction retry are provided, and the instruction retry is controlled by values of these flip flops, thereby retrying the software instruction in the range where referred memories and registers are not rewritten by software. |
