Raster line comparator circuit for video game

Details Raster line comparator circuit for video game Raster line comparator circuit for video game

1983-06-03

1986-02-25

Pinkham, Richard C.

Amusement devices: games

Aerial projectile game; game element or accessory therefor...

Target

273DIG28, 3401462, 340723, 358 22, 364521, A63F 922

Patent

active

045725063

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.

REFERENCES:
patent: 3916306 (1975-10-01), Patti
patent: 3993917 (1976-11-01), Kalter
patent: 4031511 (1977-06-01), Britton
patent: 4170741 (1979-10-01), Williams
patent: 4286320 (1981-08-01), Ott
patent: 4323982 (1982-04-01), Eichrodt et al.
patent: 4333025 (1982-06-01), Domogalla
patent: 4393394 (1983-07-01), McCoy
patent: 4441171 (1984-04-01), Hoffmann
Guttag et al., "Video Display Processor Simulates Three Dimensions", Electronics, Nov. 20, 1980, pp. 123-126.

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