| 摘要 |
A method and apparatus for reducing the participation of a central processing unit (28) in the writing of an image into a refresh memory (12) in a graphics display system, wherein a storage means (24) stores attribute data at selected addresses, and addressing means (26) address the storage means in accordance with an attribute format instruction supplied from the central processing unit (28). The attribute format instruction includes a scaler count, a length count, and a starting address. The addressing means (26) address the storage means in accordance with the attribute format instruction and the pixel addressing of the refresh memory (12). The addressing begins at the starting address and is incremented from the starting address after a number of pixels, determined by the scaler count, has been addressed in the refresh memory (12). The addressing means (26) are reset when the starting address has been incremented from the starting address a number of times, which number of times is determined by the length count in the attribute format instruction. |
