Clip Window Sprites Register
From SpecNext Wiki
| Number | TBRegisterNumber::$19 |
|---|---|
| Readable | TBRegisterReadable::Yes |
| Writable | TBRegisterWritable::Yes |
| Short Description | ShortDesc::Sets and reads clip-window for Sprites |
- read/write: X1 position
- read/write: X2 position
- read/write: Y1 position
- read/write: Y2 position
The values are 0,255,0,191 after a Reset.
Clip window on Sprites works by default only when the "draw over border" is disabled. With "over border" enabled, the clip window must be enabled extra by bit 5 in {{#ask: TBRegisterNumber::$15 }} ($15), and X-axis coordinates of clip-window are then doubled, see the {{#ask: TBRegisterNumber::$15 }} ($15) for details and example. Set it to {0,159,0,255} to cover whole pixel+border sprite area (320x256 pixels area of display) in the x-axis doubled mode.
The current read/write index (which coordinate is next) can be read or reset by {{#ask: TBRegisterNumber::$1C }} ($1C).