| 摘要 |
<p>PURPOSE:To eliminate the exchange of a mask ROM and to improve the efficiency for correction of a program in an electroic giter device which registers and processes various types of information, by giving a correction to the program which is fixedly stored in the mask ROM. CONSTITUTION:The mode selection key of an input means 7 is selected to set a prescribed operation mode for registration. Then a power supply circuit 21 is actuated to execute an initial working program. In accordance with the execution of said working program, the information is set for an RAM3 in relation to the application of a power supply on the basis of the storage information of an RAM5. The RAM3 stores a flat in the same address as the program changing address of a mask ROM2. A CPU1 gives addresses successively to the mask ROM2, and a flag is detected out of the RAM3 at a position A where a program change is needed. Then an interruption is applied to execute a corrected program.</p> |
