| 摘要 |
PURPOSE:To hold a correct instruction executing sequence by changing the relevant area of a program immediately after a specific instruction is executed although a program within an on-line is changed while the program is temporarily stopped. CONSTITUTION:A specific instruction is equal to a kind of invalid instructions which gives no state change to a computer and a memory. The computer restarts its execution at the specific instruction or its following instruction. In addition, the specific instruction exists in an area where it is executed periodically and never exists in a subroutine nor an interruption processing routine. Furthermore, just one specific instruction can exist in a program to be executed. For instance, the instruction of the address 0 of the program is equal to a specific instruction. In such a case, the execution of program is stopped immediately after the address 0 is executed in case the instructions excepting for address 0 are added or deleted. Then the instructions are added or deleted for the program stored in the memory. After this processing, the program execution is started again at and after the address 0 or an address 1.
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