| 摘要 |
<p>PURPOSE:To shorten the processing time just with the previous transfer of the contents to frequently receive the repetitive accesses to an internal storage as long as these contents are stored in an external storage. CONSTITUTION:When a CPU 2 has an access to an external storage area, a deciding circuit 5 decides whether an address A, for example, designated by the CPU 2 shows or not the area where the contents of the external storage area are previously transferred to an internal storage 3. Then the circuit 5 outputs a control signal showing the deciding result and also outputs a conversion address as necessary. A selector circuit 6 inputs the address A or the conversion address as an address to be inputted to the storage 3 based on the control signal outputted from the circuit 5. Then a buffer control circuit 9 controls a data buffer 11 based on the control signal of the circuit 5.</p> |
