| 摘要 |
PURPOSE:To increase or change extremely easily the electronic computer memories by using a memory consisting of memory card groups having different memory capacities to attain an access method of a memory unit which performs a normal operation. CONSTITUTION:The capacity information 9 supplied to the 1st memory card 11 is added with ''1'' by an ROM7A corresponding to a memory unit 6A and then delivered. The corresponding input/output data is compared with the address information 10 by a comparator 8 to discriminate the propriety of an access to the unit 6A. When this propriety is not decided, the data containing ''1'' added to the information 9 is supplied to an ROM7B of the next stage. Furthermore ''1'' is added to the data by the ROM7B corresponding to a memory unit 6B. Then said data is delivered. The corresponding input is compared with the address information 10 by the comparator 8 to discriminate the propriety of an access to the unit 6B. Such operations are carried out successively with the 1st, 2nd and 3rd memory cards 11, 12 and 13 respectively. Then an access is given to a memory unit which can have the coincidence between data values obtained through variations of information 10 and 9. |
