Attribute control method and apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jul 5, 1988
Grant Date -
N/A
app pub date -
Feb 21, 1986
filing date -
Feb 21, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus for controlling visual attributes associated with characters displayed on a video display screen including a video memory for storing multiple data words corresponding to screen character locations, an attribute memory associated with the video memory for storing visual attribute codes and an attribute propagation store associated with the attribute memory for controlling visual attribute code propagation. A latch controls writing into the attribute propagation memory, a control bit for controlling visual attribute code propagation. The apparatus also includes a video display generator and control logic responsive to the control bit for causing a predetermined attribute code to be propagated for a preselected number of screen character locations.
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