发明名称 |
GRAPHICS DISPLAY CONTROLLER EQUIPPED WITH BOUNDARY SEARCHING CIRCUIT |
摘要 |
A graphics display controller equipped with a boundary search circuit is disclosed. There is provided a mask information generator generating mask information consisting of a plurality of bits in response to control data, at least one bit of the mask information taking non-mask data and the remaining bits thereof taking mask data. Each bit data of the mask information is supplied to the associated one of a plurality of mask gates along with the associated bit data of display data of one word read from a display memory. Each of the mask gates outputs the associated bit data of the display data when the associated mask information bit data is the non-mask data. The output data of the mask gates are supplied to a position information generator wherein the position information relative to a position of a bit taking a predetermined logic level is generated. |
申请公布号 |
EP0280320(A3) |
申请公布日期 |
1990.11.14 |
申请号 |
EP19880102895 |
申请日期 |
1988.02.26 |
申请人 |
NEC CORPORATION |
发明人 |
OGUCHI, TETSUJI C/O NEC CORPORATION |
分类号 |
G06T5/00;G06T11/40 |
主分类号 |
G06T5/00 |
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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