Display control apparatus for controlling to write image data to

Details Display control apparatus for controlling to write image data to Display control apparatus for controlling to write image data to

1987-06-16

1988-12-06

Zache, Raulfe B.

Boots, shoes, and leggings

364518, 364521, G06F 1566

Patent

active

047899638

ABSTRACT:
A method for controlling a plurality of memory planes in a writing operation in a display control apparatus of a graphic system, the method including the steps of selectively connecting a plurality of the memory planes to a data bus by using an interface unit; selectively applying a write enable signal to the memory planes from a plane designating unit; applying data to be written to the data bus from a central processing unit; writing the data into the memory planes to which the write enable signal has been applied and which are connected to the data bus; and writing predetermined fixed data into the memory planes to which is the write enable signal has been applied but which are not connected to the data bus.

REFERENCES:
patent: 3978470 (1976-08-01), McGuire
patent: 4016544 (1977-04-01), Morita
patent: 4094000 (1978-06-01), Brudevald
patent: 4424572 (1984-01-01), Lorig
patent: 4484187 (1984-11-01), Brown
patent: 4490797 (1984-12-01), Staggs et al.
patent: 4509043 (1985-04-01), Mossaides
patent: 4598384 (1986-07-01), Shaw et al.
EPC Search Report EP 84306458.

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