JPS648580A - Memory device for electronic equipment - Google Patents

Abstract

PURPOSE:To improve a data processing speed by a CPU without using a special element by generating a write signal to another peripheral equipment by the result of judgement whether or not reading is applied to a memory of a specific area when the CPU reads the data from the memory. CONSTITUTION:When the CPU 1 reads the data from a memory 2, whether or not it is read to a memory of a specific area is judged, and a write signal is generated to another peripheral device 4 through the result of the judgement. That is, the output data depending on the set state of an address area setting switch 5 and the data on an address bus are coincident with each other, a signal is outputted from a comparator 6 and the output signal and the data read signal RD of the CPU 1 enter a negative logic AND circuit 7 and a data write signal WR is outputted from the negative logic AND circuit 7 too the peripheral equipment 4. Thus, the data processing speed is improved without using a special element.