| 摘要 |
PURPOSE:To facilitate the change of interrupt process of a ROM without increasing the capacity of hardware by jumping to an interrupt process program again after jumping to a program in a RAM by an interrupt vector table at the time of generation of interruption. CONSTITUTION:At the time of a power source is turned on, a jump program 9 in which only jump instructions are enumerated is sent from the back-up 3 of a ROM 1 to a RAM 2 according to an initial program 4. If interruption is generated during execution of an application program loaded in the RAM 2, the jump program 9 is executed by an interrupt vector table S of the ROM 1, and further, an interrupt process program 6 is executed. On the other hand, if the jump address of the program 9 of the table 5 is changed to the forefront address of an interrupt process program 7 after load changing by a program 8, the program 7 after changing is executed after execution of the program 9 by the table 5. Thereby, changing of interrupt processing of the ROM is executed easily without increasing the capacity of hardware. |
