Memory read/write control system for color graphic display

Details Memory read/write control system for color graphic display Memory read/write control system for color graphic display

1986-01-21

1989-06-13

Harkcom, Gary V.

Boots, shoes, and leggings

340798, 340800, G06F 315

Patent

active

048398284

ABSTRACT:
A color graphic display having a read/write control system for a buffer memory therein. The invention provides Line-on-Line and Underpaint by way of a method which invleves reading the contents of a frame buffer storage location for which new pixel data is being provided, comparing those contents with data representing a display background characteristic or color, and if the result of the comparison is positive, storing the new pixel data in the frame buffer storage location. If the result of the comparison is negative, a selected data value different from the new pixel data is stored in the frame buffer storage location.

REFERENCES:
patent: 4528636 (1985-07-01), Robinson III
patent: 4616336 (1986-10-01), Robertson et al.
patent: 4648045 (1987-03-01), Demetrescu
patent: 4682297 (1987-07-01), Iwami
patent: 4688033 (1987-08-01), Carini et al.
patent: 4688190 (1987-08-01), Bechtolsheim

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