| 摘要 |
<p>PURPOSE:To select efficiently a data by deciding whether a data fixed in an ROM or a data inputted by a user is used as to the data part in a user's program at a point of time when the data is fixed to the ROM. CONSTITUTION:The user inputs a program to an RAM 3 with a keyboard and a display or the like 5 and uses an ROM writer 4 to store the user's program to the ROM. Then information designating a flag in the ROM is given in giving a write instruction of ROM to a process controller PC. In turning off a power, replacing the RAM 3 into the ROM and applying the power again, the PC references the flag and when the data part in the ROM is defined ineffective, a message to input data is given to the user, and the operation is attained by the data stored in an RAM 7 by receiving the data from the user. On the other hand, when the data part of the ROM is defined effective by the flag, the system is operated as conventionally by the data in the ROM.</p> |
