Multi-plane page mode video memory controller

Details Multi-plane page mode video memory controller Multi-plane page mode video memory controller

1982-12-21

1989-01-24

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340799, 340703, G09G 116

Patent

active

048003808

ABSTRACT:
A page mode memory controller for a multi-plane color video display providing three bits/pixel corresponding to three page partitioning in each of sixteen 64K dynamic RAMs is described. The three bits/pixel are routed to a color lookup table to provide a choice of eight colors from a palette of 64 colors. Graphic display information is combined with alphanumeric video information on a pixel-by-pixel basis. The combined graphic/alphanumeric information is then converted from a digital signal to an analog signal. Page mode reads access three color planes for video display cycles using a counter for the two least significant memory column address bits. To create the displayed image, vectors are drawn three times, once at each plane.

REFERENCES:
patent: 4445115 (1984-04-01), Rudgard
patent: 4446457 (1984-05-01), Alexander
patent: 4451825 (1984-05-01), Hall et al.
patent: 4454593 (1984-06-01), Fleming et al.
patent: 4509043 (1985-04-01), Mossaides
Architecture of an Electronic Book, Murray et al., IEEE Trans. on Ind. Elec., vol. IE-29, No. 1, 2/82, pp. 82-91.

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