| 摘要 |
<p>PURPOSE:To make it possible to purchase a new prepaid card by utilizing an old prepaid card only when the card balance of the old prepaid card is less than the selling amount of the new prepaid card and the combination of the old prepaid card and cash is required for purchasing the new prepaid card. CONSTITUTION:The amount of cash loaded from cash slots 5a, 5b is read out by a cash reader 20 and stored in a display buffer of a RAM 13. On the other hand, the balance of a prepaid card inserted from a prepaid card inserting port is read out by a card reader 18 and compared with a maximum balance smaller than the selling amount of a new prepaid card, only when the card balance is less than the maximum balance, the card balance is added to the contents of a display buffer. When the amount data of the buffer exceeds the selling amount of the new prepaid card, the inputs of commodity selecting keys 3a to 3d is made available.</p> |
