Semiconductor integrated circuit device allowing fast rewriting

Details Semiconductor integrated circuit device allowing fast rewriting Semiconductor integrated circuit device allowing fast rewriting

1995-03-24

1998-06-16

Tung, Kee M.

Computer graphics processing and selective visual display system

Computer graphic processing system

Integrated circuit

345511, 345517, G06F 1576

Patent

active

057678650

ABSTRACT:
Two frame buffer memories are used. Depth coordinates are stored in a data bank memory of the first frame buffer memory. A comparing unit makes comparison between the depth coordinate of an image data currently displayed and the newly input depth coordinate, and thereby outputs a comparison result signal from a comparison result signal output terminal. In the second frame buffer memory, color data is stored in a data bank memory, and the comparison result signal sent from the first frame buffer memory is input via a comparison result signal input terminal. An image processing unit performs blending processing on the color data in response to the comparison result signal, and rewrites the color data.

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patent: 5572655 (1996-11-01), Tuljapurkar et al.
Application of Multi-port VRAM, IC Application Note, Hitachi, 1986, pp. 15-37.
"Samsung Proposes A Dual Port 1 Mbyte Frame Buffer", JEDEC May 19, 1993, Samsung Proposal.

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