| 摘要 |
PROBLEM TO BE SOLVED: To surely hold the security of contents which are stored it an external storage device in a memory interface device for connecting a data processor to the external storage device. SOLUTION: The device is provided with a first connecting means 11 for connecting the signal input/output lines D0-D3 of the data processor to the signal input/output lines d0-d3 of the external storage device by prescribed correspondence relation, the second connecting means 12 for connecting the signal input/output lines D0-D3 with the signal input/output lines d0-d3 by correspondence relation being different from the prescribed one and connection change-over means 13 and 14 selecting one of them so as to change-over connection between the data processor and the external storage device. |
