发明名称 |
GRAPHICS DISPLAY APPARATUS |
摘要 |
<p>23 Pixel information for a graphics display apparatus is stored in a bit map memory which may be considered as grouped into a number of bit planes corresponding to different separable surfaces or color patterns to be displayed by the apparatus. Information from a computer data bus is written into the proper surface by shifting a predetermined number of bit positions and write protecting information in the bit map memory representing surfaces other than the one it is desired to change.</p> |
申请公布号 |
CA1258546(A) |
申请公布日期 |
1989.08.15 |
申请号 |
CA19850485138 |
申请日期 |
1985.06.25 |
申请人 |
TEKTRONIX, INC. |
发明人 |
DODGE, WARREN;WIRFS-BROCK, REBECCA |
分类号 |
G06F3/153;G09G5/00;G09G5/02;G09G5/06;G09G5/36;G09G5/393;(IPC1-7):G09G3/00 |
主分类号 |
G06F3/153 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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