Communications: electrical – Systems – Portable self-contained
Patent
1977-06-23
1978-08-15
Trafton, David L.
Communications: electrical
Systems
Portable self-contained
273 85G, 273DIG28, G06K 1520
Patent
active
041076656
ABSTRACT:
Apparatus for continuous variation of object size on a raster type video screen in a television game. The input of a voltage controlled oscillator is varied by a game controller. The output of the oscillator drives horizontal and vertical counters at rates corresponding to the object size. These counters provide respectively horizontal and vertical addresses to a picture generator read only memory. The faster the counters are incremented the smaller the object; and with regard to the vertical address, horizontal lines of the picture are actually skipped in order to reduce the size of the object.
REFERENCES:
patent: 3614767 (1971-10-01), Carrell
patent: 3911420 (1975-10-01), Lampson
patent: 3952296 (1976-04-01), Bates
patent: 4015846 (1977-04-01), Runte et al.
patent: 4016362 (1977-04-01), Bristow et al.
patent: 4020484 (1977-04-01), Caspari
Mayer Steven T.
Milner Ronald E.
Atari Inc.
Trafton David L.
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