| 摘要 |
PURPOSE:To erase an instruction unretriable period and to improve a retry rate by rewriting an instruction, which is stored to a main storage, so as to execute a retry from the next retry unit of a retry unit. CONSTITUTION:An instruction C, which is stored in a main storage 8 is rewritten in a retry control part 17 and obtained as an instruction C' so that the retry can be executed. A response is given to trouble generation in a trouble processing control part 14 and the instruction is read from the storing part 8 by a value to be shown in an instruction counter IC15. When the instruction to be sent through a line 116 is detected to be the instruction C, the control part 17 changes the instruction C to the instruction C' and saves the instruction before the change. The changed instruction C' is stored to a position, which is shown by the value of the counter IC15 of the device 8 to be given through a line 117. Thus, the instruction unretriable period due to the rewriting of the device 8 is erased and the retry rate can be improved. |
