Active Video Line (MSB) Register
From SpecNext Wiki
| Number | TBRegisterNumber::$1E |
|---|---|
| Readable | TBRegisterReadable::Yes |
| Writable | TBRegisterWritable::No |
| Short Description | ShortDesc::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 {{#ask: TBRegisterNumber::$1F }} ($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 {{#ask: TBRegisterNumber::$64 }} ($64).