Apparatus and method for generating multiple cursors in a raster scan display system
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United States of America Patent
Stats
-
Nov 25, 1986
Grant Date -
N/A
app pub date -
Apr 8, 1983
filing date -
Apr 8, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus and a method for generating cursors in a multi-dimensional graphics display system uses line definition signals, each of which is representative of where along the horizontal display dimension one or more scan lines intersect a cursor to be presented. The apparatus includes a line definition memory for providing one or more line definition signals, and a line definition pointer circuit which responds to a scan line location by the vertical dimension, for selecting the line definition signal representative of the scan line. A generation circuit provides a cursor video signal at each horizontal location, as indicated by the selected line definition signal, where the represented scan line intersects the cursor to be presented.
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Cited Art Landscape
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