| 摘要 |
<p>PURPOSE:To save or load a program from a cassette tape with a simple device, by controlling the revolving speed of a cassette tape motor after detecting the ON/OFF state of a relay of the main body of a computer. CONSTITUTION:A relay 11 is provided to a computer main body 8, and the ON/ OFF control is performed by the input of a CMT terminal 12 via a TRQ1 to open and close a contact 10. A detecting circuit 3 of a cassette tape 1 is connected to the relay contact 10. A header 14, the program contents 15 and a non- sound part 16 are repetitively recorded on the tape 1 per program. This tape is reproduced 4 at a constant speed to read out the program name. Then a signal CMT is applied for a short time ts with an undesired program and a long time tf with a desired program respectively. Then the traveling of the tape 1 is stopped via the relay 10. The circuit 3 discriminates the duration of the stop time of the tape to switch a fast forward mode to a constant speed reproduction mode. A constant speed mode is set at the part 16 to read out the next header 14. This facilitates easy loading of a program.</p> |
