Method for transfer of data via a window buffer from a bit-plana

Details Method for transfer of data via a window buffer from a bit-plana Method for transfer of data via a window buffer from a bit-plana

1988-09-06

1990-04-10

Zache, Raulfe B.

Boots, shoes, and leggings

364965, 3649653, 364947, 3649476, G06F 1200

Patent

active

049166549

ABSTRACT:
A graphic display PC/interface system is described which includes three memory units: a source memory which is addressed in planar byte increments and stores display data units on a bit per plane basis; a target memory for storing display data units in a manner suitable for operation of a display unit; and a window buffer for transferring display data unit from the source memory to the target memory. The system transfers a quantity of display data unit bytes from the source memory to the target memory by accessing pairs of planar bytes, which pair of planar bytes may have a display data unit byte bridging therebetween. The method comprises selecting a first pair of planar bytes from the source memory; aligning the display data unit byte which lies totally within the selected first pair of planar bytes; selecting a second pair of planar bytes from the source memory; aligning a display data unit byte which lies totally within the second selected pair of planar bytes; consolidating the display data unit byte which bridges between the first and second pairs of selected planar bytes; aligning the consolidated display data unit byte; and transferring aligned display data unit bytes to the window buffer.

REFERENCES:
patent: 3917933 (1975-11-01), Scheuneman et al.
patent: 3938102 (1976-02-01), Morrin et al.
patent: 3973245 (1976-08-01), Belser
patent: 4434502 (1984-02-01), Arakawa et al.

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