| 摘要 |
PURPOSE:To accurately detect whether the generation of a bug is present or not by securing a return position mark bit and a return instruction mark bit in a prescribed memory to record both mark bits in response to the addresses of a subroutine and having collation between an address obtained when a return instruction is executed and the position of a return position mark. CONSTITUTION:Both a return position mark bit and a return instruction mark bit are secured in a prescribed memory (parity memory) 3 having at least >=2-bit space. These two mark bits are recorded in response to the addresses of a prescribed subroutine forming a microprogram. Then a bug detecting means 50 collates an address obtained when a return instruction is executed with the position of a return position mark. Thus it is possible to detect whether the generation of a bug is present or not by an accurate and simple system. |
