| 摘要 |
PURPOSE:To carry out an optimum operation without damaging a new function even if accessories having the new function which are not expected at the time of a system design by obtaining a characteristic that a change program is executed when the value of a program counter and address data stored in memory are in coincidence. CONSTITUTION:When an uncoincident external device 2 is attached to a camera 1 at the time of the system design, change address data and change program data which are stored in the external device 2 are stored in a microcomputer 10 inside the camera 1. When a program counter PC and the change address data stored in change program memory 11 are in coincidence, the microcomputer 10 of the camera 1 is operated according to the change program data stored in the change program memory 11. Thus, a program stored in the memory of the camera 1 is corrected and changed by the external device 2. |
