Documentation: VDU 28
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» VDU 28
VDU 28 (&1C)
Use
Enables definition of text window, i.e. area of screen to which future text is written (rather than being written anywhere on the screen).
Syntax
VDU 28,lx;by;rx;ty;
Parameters
| lx | Left X |
| by | Bottom Y |
| rx | Right X |
| ty | Top Y |
Notes
Four coordinates are given as character positions, with the origin being 0,0 at the top left of the screen. Maximum values depend on the current screen mode.
