Unofficial Name: RectBorder
BCALL Address: 5236
Minimum OS Version: 2.30
Either draws, erases, or inverts a rectangular border on the screen.
- B: type of drawing (0 to erase, 1 to draw, 2 to invert)
- H: upper left corner pixel row
- L: upper left corner pixel column
- D: lower right corner pixel row
- E: lower right corner pixel column
- plotLoc,(iy+plotFlags) set to update display only, reset for both display and graph buffer
- Rectangle is drawn
It was added in OS 2.30. Do not attempt to BCALL it on an earlier version.