Active Video Line LSB Register
From SpecNext official Wiki
|Short Description||Holds the eight LSBs of the raster line currently being drawn.|
The MSB of the raster line is in Active Video Line MSB Register ($1E).
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).