| 摘要 |
PURPOSE:To prevent the influence to the instruction execution due to the non- synchronizing interruption factor by controlling the conditions that the non- synchronizing interruption factor for the program is inputted to the interruption displaying register. CONSTITUTION:Usually, the condition of a flip-flop 9 is zero, and when the interruption factor occurs, unconditionally, the interruption factor is held from a signal line 1114 through an interruption factor control part 10 and a signal line 1112 to an interruption displaying register 1. A starting address is generated at an address generating circuit 2 and when the instruction to change the contents of an interruption displaying register 1 is started, the starting address is set to an address register 3, and a microprogram of a control store 4 designated by the address is started. When the flip-flop 9 is set by the first cycle of the microprogram, after the second cycle, the generated interruption factor is held at an interruption factor control part 10 until the flip-flop 9 is reset.
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