| 摘要 |
PURPOSE:To improve operability, by inhibiting the program write until a key indicating the program write is operated, in a mini computer provided with the program function due to a learn program system. CONSTITUTION:In case of the program write, mode switch 2 of key input part 1 is set to mode LRN for the program write and mode RUN for normal calculation and program execution, and thus, control part 4 outputs signal (b) or (c) to AND gates 10 and 11. However, until P1 key 3a and P2 key 3b are operated, FF13 is reset by signal (f), and the output of Q in the set side is ''0'' still. Consequently, gates 10 and 11 are closed, and signal (g) which is the write instruction for program memory 8 and signal (h) which is the read instruction are not transmitted. Therefore, the result is displayed on display part 7 after the operation corresponding to the key operation. |
