Display control device

Details Display control device Display control device

Filed on

1991-07-09

Date issued

1993-11-16

Examiner

Hjerpe, Richard

Patent Class

Computer graphics processing and selective visual display system

SubClass

Display peripheral interface input device

SubSubClass

Light pen for fluid matrix display panel

Other Related Categories

345189, G09G 116

Type

Patent

Status

active

Patent number

052627675

Description

ABSTRACT:
A CRT controller having a drawing function includes designation means to designate a predetermined area of an external memory as a reference area for tiling, and a drawing processor which transmits a display pattern in the reference area designated by the designation means, to a drawing area of the external memory. Since the CRT controller of this construction permits the use of the external memory easy of enlarging the capacity thereof for a tiling pattern, it realizes the tiling processing with a complicated tiling pattern.

REFERENCES:
patent: 4225861 (1980-09-01), Langdon, Jr. et al.
patent: 4646076 (1987-02-01), Wiedenman et al.
patent: 4646078 (1987-02-01), Knierim et al.
patent: 4656468 (1987-04-01), Takikawa et al.
patent: 4658247 (1987-04-01), Gharachorloo
patent: 4755810 (1988-07-01), Knierim
patent: 4763119 (1988-08-01), Matsubara et al.
patent: 4906986 (1990-03-01), Takeda
patent: 5043717 (1991-08-01), Takeda

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