MB86290A Datasheet, PDF (59/184 Pages) Fujitsu Component Limited. – Graphics Controller Hardware Specifications

6 Drawing Control
6.1 Coordinates
6.1.1 Drawing Coordinate
MB86290A manages a drawing frame as a 2D coordinate with the origin at
the top left edge. The maximum coordinate is 4096 x 4096. Each drawing
frame is located in the Graphics Memory by setting the address of the origin
and width (pixel size of X span). Although the maximum size of Y span does
not need to be specified, take care about the memory size allocation so as not
to overlap any other frames. Also, setting the clip field (top left and bottom
right coordinates in registers) prevents drawing of all images outside the
border of the clip window.
Base
Point
X (max. 4096• j
Draw frame size X
(Xmin, Ymin)
Clip border
(Xmax, Ymax)
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