Apparatus for scrolling a video display

Details Apparatus for scrolling a video display Apparatus for scrolling a video display

1980-10-03

1984-04-24

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340734, 340749, G09G 116

Patent

active

044451148

ABSTRACT:
A video game includes apparatus for scrolling playfield objects appearing on the display unit of the game. The apparatus selectively offsets the address used to access an addressable random access memory containing data indicative of the TV picture displayed. The random access data, when accessed, is used to address a video data memory which provides the building block components of the video display. Further scrolling effect is obtained by selectively delaying the video data communicated to the video display unit.

REFERENCES:
patent: 3011164 (1961-11-01), Gerhardt
patent: 3242470 (1966-03-01), Hagelbarger et al.
patent: 3396377 (1968-08-01), Strout
patent: 3594757 (1971-07-01), Gard et al.
patent: 3611348 (1971-10-01), Rogers
patent: 3781850 (1973-12-01), Gicca et al.
patent: 4068225 (1978-01-01), Lee
patent: 4129859 (1978-12-01), Iwamura et al.

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