| 摘要 |
<p>PURPOSE:To facilitate the interface between an external terminal for input and a CPU by applying the A/D conversion to the physical data given from an external input device and using this converted data as the block position information and the position information and the data stored in a block. CONSTITUTION:A CRT controller 5 uses the horizontal synchronizing signal which is produced for control of a CRT 7 and fetches the data produced by an address/data generating device 3. The addresses and data transferred to the controller 5 from the device 3 are sent to a transfer address register and a transfer register for rewriting the contents of a frame memory 6. Thus the data stored in the memory 6 are rewritten by a a memory transfer cycle which is previously decided in the controller 5.</p> |
