Graphics display apparatus

Details Graphics display apparatus Graphics display apparatus

G - Physics

09

G

375/12

G09G 3/00 (2006.01) G09G 5/02 (2006.01) G09G 5/393 (2006.01)

Patent

CA 1258546

23 Abstract of the Disclosure Pixel information for a graphics display apparatus is stored in a bit map memory which may be considered as grouped into a number of bit planes corresponding to different separable surfaces or color patterns to be displayed by the apparatus. Information from a computer data bus is written into the proper surface by shifting a predetermined number of bit positions and write protecting information in the bit map memory representing surfaces other than the one it is desired to change.

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