Rapid graphics bit mapping circuit and method

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340703, 340723, G09G 100

Patent

active

046480498

ABSTRACT:
A circuit and method for a display controller especially adapted for display memories organized in arrays. The invention permits high speed modification of the contents of a display by generating the address signals of a selected linear pattern as the data block to be modified is retrieved from the display memory. For vectors, the addresses are generated in the same time as required for data block retrieval. The invention also permits calculation of the addresses of simple curves as the data block to be modified is retrieved, though calculation times typically are longer than for vectors. Modified Breshenham's algorithm is used for the address calculation.

REFERENCES:
patent: 4500875 (1985-02-01), Schmitz
patent: 4520356 (1985-05-01), O'Keefe et al.

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