| 摘要 |
PURPOSE:To relieve the load of a CPU, by providing a picture memory and giving an OR function to the picture memory itself for simplifying the synthesis between a picture in a memory and an input signal picture. CONSTITUTION:An address accessed to the picture memory 4 is given and an input data of one word is inputted via an OR gate 13. The content of the address of the memory 4 is read out with an OR write signal at an AND gate 12 and taken as the other input of the OR gate 13. Thus, the content of memory is read out and the OR gate 13 is gated with the input data. The gated input data is written with write enable signals WE (1-4) 11. |
