MB86290A Datasheet, PDF (48/184 Pages) Fujitsu Component Limited. – Graphics Controller Hardware Specifications

5.2.4 Display Position Control
The graphic image data to be displayed is located in the logical 2D coordinate
area (logical graphics field) in the Graphics Memory. There are six logical
graphics fields as follows:
♦ C layer
♦ W layer
♦ ML layer (left field of M layer)
♦ MR layer (right field of M layer)
♦ BL layer (left field of B layer)
♦ BR layer (right field of B layer)
The correlation between the logical graphics field and physical display
position is defined as follows:
Origin Address (OA)
Stride (W)
Display Address (DA)
Display Position X,Y (DX,DY)
Logical Frame
VDP
Display Frame
HDP
Display Position Parameters
OA
Origin Address Base address of logical graphics field. Memory address of top
left edge pixel in logical graphics field
W
Stride
Width of logical graphics field. Defined in 64-byte boundary
H
Height
Height of logical graphics field. Total raster (pixel) count of field
DA
Display Address Display base address. Top left position address of display
frame
DX
Display Position Display base 2D coordinate
DY
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