公开(公告)号：US06865586B2

公开(公告)日：2005-03-08

申请号：US10067258

申请日：2002-02-07

申请人： Frank Chen ,  Anny Liu

发明人： Frank Chen ,  Anny Liu

IPC分类号： G06F3/00 ,  G06F15/02

CPC分类号： G06F15/0225

摘要： A calculator comprises an input having an UNDO key for recovering cleared values. When displayed data or recorded data of memory is cleared by pressing one of deletion keys, the cleared data is pushed into a stack register. A flag register is set when the displayed data or recorded data is cleared by a deletion key. When the UNDO key is pressed and the flag register indicates that the displayed data or recorded data was cleared by the deletion key, a data entry is popped from the stack register, so as to recover the cleared value.

摘要翻译： 计算器包括具有用于恢复清除值的UNDO密钥的输入。 当通过按下一个删除键清除显示的数据或存储器的记录数据时，清除的数据被推入堆栈寄存器。 当通过删除键清除显示的数据或记录的数据时，设置标志寄存器。 当按下UNDO键并且标志寄存器指示所显示的数据或记录数据被删除键清除时，从堆栈寄存器弹出数据条目，以便恢复清除的值。