Graphische Anzeigesteuerung, versehen mit Grenzensuchschaltung.
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
DE3852327(D1)
申请公布日期
1995.01.19
申请号
DE19883852327
申请日期
1988.02.26
申请人
NEC CORP., TOKIO/TOKYO, JP
发明人
OGUCHI, TETSUJI C/O NEC CORPORATION, MINATO-KU TOKYO, JP