发明名称 |
Linear address conversion |
摘要 |
A graphics subsystem (10) employs an image memory (12) that includes an on-screen part (44) and an off-screen part (46). The locations of the on-screen memory (44) are continually scanned to provide data to be displayed on a display device (16). The off-screen part (46) stores data that represent image segments that have been occluded by windowing. To transfer data between the on-screen part (44) and the off-screen part (46), an address generator (24) generates a sequence of two-dimensional addresses representing the two-dimensional positions of the pixels whose data are to be transferred. These addresses are converted to one-dimensional addresses by a simple circuit consisting of multiplexers (26 and 28), adders (30 and 32) and a multiplier (34).
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申请公布号 |
US5047958(A) |
申请公布日期 |
1991.09.10 |
申请号 |
US19890366859 |
申请日期 |
1989.06.15 |
申请人 |
DIGITAL EQUIPMENT CORPORATION |
发明人 |
COMINS, TODD R.;ENGELSE, WILLEM A. H. |
分类号 |
G09G5/14;G09G5/36;G09G5/39 |
主分类号 |
G09G5/14 |
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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