Active Video Line MSB Register

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Number $1E
Readable Yes
Writable No
Short Description Holds the MSB (only, as bit 0) of the raster line currently being drawn.

The low 8 bit part of the raster line number is in Active Video Line LSB Register ($1F).

The line coordinates use coordinate system of Copper coprocessor, i.e. line 0 is the first line of pixels.

Since core 3.1.5 the numbering of lines can be offseted by Vertical Video Line Offset Register ($64).