| 摘要 |
<p>A system for translating a portrait-oriented software address to a portrait-oriented yet landscape-configured display address. The system includes a central processing unit (CPU), a display device and an address translation system. The CPU generates a software address. Based on the orientation of the display device, the address translation system either passes the software address 'as is' or translate the address to represent a portrait-oriented display address. The address translation system translates according to the functions L=1n(HD)/1n 2 and M=1n(WD)/1n 2, wherein HD is the landscape-oriented display device pixel height and WD is the landscape-oriented display device pixel width. L represents the number of least significant software address bits to translate as most significant physical address bits, and M represents the number of most significant software address bits to invert and translate as least significant physical address bits. The resulting address represents a pixel location on the display device which has been rotated counter-clockwise ninety degrees for portrait orientation.</p> |
