Raster line comparator circuit for video game
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United States of America Patent
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-
Feb 25, 1986
Grant Date -
N/A
app pub date -
Jun 3, 1983
filing date -
Jun 3, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A comparator circuit incorporated into a video game device and operated responsive to first and second non-overlapping clock pulses can be used to compare background information location to SPRITE information location for both raster line (vertical) and column (horizontal) coordinates to provide a high speed interrupt signal to a central processor unit (CPU) triggering a processing of SPRITE or other features' display instead of a processing of background display, the comparator being implemented in less silicon area and having a lower power usage than other types of circuit implementations.
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