Personal computer apparatus for block transfer of bit-mapped ima

Details Personal computer apparatus for block transfer of bit-mapped ima Personal computer apparatus for block transfer of bit-mapped ima

1986-07-18

1989-10-17

Lastova, Maryann

Amusement devices: games

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

Target

273DIG28, 340720, A63F 922

Patent

active

048741647

ABSTRACT:
A computer that provides data to a video display using a bitmap display memory organization and bitplane addressing. Separate control is provided for two bitplane backgrounds and for eight reusable and easily movable sprites. Additional logic allows for dynamically-controllable interobject priority and collision detection among data in each of the bitplane backgrounds and sprites. A coprocessor provides for video beam-synchronized changes to data in registers, freeing the main processor for general purpose computing tasks. A block image transfer is provided to rapidly copy data in large blocks from one memory location to another. In hold-and-modify mode, color output circuitry holds the value for a previously displayed pixel while bitplane data modifies those values, allowing for simultaneous display of a greatly increased number of colors.

REFERENCES:
patent: 4126893 (1978-11-01), Cronshaw et al.
patent: 4296476 (1981-10-01), Mayer et al.
patent: 4435776 (1984-03-01), Ratcliffe et al.
patent: 4445187 (1984-04-01), Best
patent: 4509043 (1985-04-01), Mossaides
patent: 4570217 (1986-02-01), Allen et al.
"Amiga: The Message is the Medium," Creative Computing, vol. 11, No. 9, pp. 32-41 by John J. Anderson, Sep. 1985.
"What Makes It So Great?" Creative Computing, vol. 11, No. 9, pp. 34-40, by Sheldon Leemon, Sep. 1985.

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