| 摘要 |
PURPOSE:To improve the precessing speed of a processor by applying only an address data and an address increment/decrement command to read/write continuous address data in a memory. CONSTITUTION:A read/write command R/W is applied from a processor to a memory controlling circuit 10 through a control bus 3 and an address a1 in a memory 11 is selected to read/write data. When the succeeding addresses (a2, a3...) are to be read/wirtten, the processor 1 outputs for example an address data A20 (not shown in the drawning) and an increment command U, and an address a20 is selected by the address data A20 to read/write the data. Then an AND circuit 5 in a control part 4 is opened, a counter 6 counts up +1 by a pulse signal C and the value is sent to an address decoder 9, selecting an address a21 (not shown in the figure) and executing the read/write operation. Since the pulse signal C is outputted in every read/write operation, the counter 6 adds numbers continuously and ascending addresses can be selected. |
