| 摘要 |
PURPOSE:To carry out an operation identical to that in case the function key which was operated several even times continuously is oprated just once even when the four-rule-of-arithmeric key is operated in subsequence to the operation of the numerical key after operation of the function key in continuous even times. CONSTITUTION:For instance, in case the key operation of ''2X3+4=''is done mistakenly as ''2XX3+4'', the data of ''+'' key is supplied to memory 10 and ''2X3='' is carried out at arithmetic circuit 6 and based on the data of ''x'' key which is memorized in memory 12. And the operation result (6 in this case) is memorized in registers X and Y. Then the disagreement of the data is detected between memories 10 and 12, and FF15 is reset. In this way, it is known that ''2XX3'' is not the lock operation but that ''2X3'' is correct, and thus the lock operation order is released. After this, the key operation of ''4='' is given, and then ''6+4='' is carried out to obtain ''10''. |
