| 摘要 |
<p>PURPOSE:To secure the system stability even in an application field where the secrecy is required by using a control means which inhibits the execution of a specific instruction with use of a discriminating signal which shows that an input ID code received from an ID code discriminating means is not equal to the specific one. CONSTITUTION:An ID code discriminating means 5 discriminates whether an input ID code is equal to the specific one or not. A control means 7 inhibits the execution of a specific instruction with use of a deciding signal showing that the input ID code outputted from the means 5 is not equal to the specific one. Thus all instructions are available in case the ID code received from outside is equal to the specific one. While the number of available instructions is limited in case said input ID code is not equal to the specific one. Thus the system stability is secured even in an application field where the secrecy is required.</p> |
