| 摘要 |
<p>PURPOSE: To optimally use a memory capacity and to record successive balances in a memory by writing a new reference pair in the prescribed rank of a memory position. CONSTITUTION: A memory card is composed of a CPU 40, an ALC 42, a RAM type working memory 44, a ROM type program memory 46 and an EPROM type data memory 48 and the data memory 48 is used for storing the successive balances. An old balance is tentatively stored in the memory 44 and a new balance is calculated by the ALU 42. '1' is written in the address of the old reference pair and the new reference pair of a memory area by the operation of a user and the new balance is written in the data memory 48.</p> |
