| 摘要 |
PURPOSE:To secure an immediate return to the preceding state from the interruption process routine by setting up the independent address and the address grown at the address growing circuit based on the address setting signals given from outside. CONSTITUTION:Memory circuit 20 gives the first reading to the data supplied last, and address growing circuit 26 renews the addresses in sequence in order to grow address 23 showing the storage position of circuit 20. Renewed address storing circuit 27 stores address 29 given from circuit 26 and then applies it to circuit 26 again. When set operation designation signal 24-3 freatures ''1'', the contents supplied from outside via input port 28 is written into circuit 27. At the same time, the contents of circuit 20 of the address designated by the contents applied to circuit 27 is read out in the form of output data 25. Thus, an immediate return is possible. |
