Display control device

Details Display control device Display control device

1992-09-16

1994-05-10

Weldon, Ulysses

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

345192, G09G 102

Patent

active

053112130

ABSTRACT:
A display control device according to the present invention includes a common memory having two functions, one as a refresh memory for outputting a character code and the other as a character generator for generating a character font, an output character code from which is stored in a line buffer. In this case, a display address generator circuit generates a character address for generating the character code and a raster address for designating the character font, which are in turn switched by an address selector and outputted to said common memory which then outputs a video signal to a video control circuit based upon said character font. Additionally, there is provided a line buffer control circuit for outputting a read/write access control signal to said line buffer based upon the raster address.

REFERENCES:
patent: 4075620 (1978-02-01), Passavant et al.
patent: 4165506 (1979-08-01), Brands et al.
patent: 4345244 (1982-08-01), Greer et al.
patent: 4422070 (1983-12-01), Couper et al.
patent: 4595996 (1986-06-01), Morley et al.
patent: 4604712 (1986-08-01), Orrhammar

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