| 摘要 |
<p>PURPOSE:To arbiltrary set the display mode every sector of screen and sectored area, by providing a simple hardware for the transfer of direct memory access and by arbitrarily designation of the area of the transferred data with software. CONSTITUTION:CPU1 controlling and data processing, memory 2 constituting the main memory in CPUT 1, memory 2 constituting the main memory unit in CPU 1, controller 3 with direct access DMA for the memory 2, and the interface 4 performing data giving and reception to the peripheral units are connected parallelly via the control, address and data bus CB, AB and DB, and the display controller 5 is connected. Further, at DMA transfer, the output of the address counter or the area designation means is detected with the controlers 3 and 5, aectioning signal is produced when the DMA transfer of the data of one display area is finished, the set value of the counter and area designation means is memorized every sector area of the displayed picture, the area for DMA transfer is determined and it is displayed on arbitrary sector area through the read out of the set value.</p> |
