rectangle - Draws a rectangle
Draws a rectangle (graphics mode)
Gets: Left, Top, Right, Bottom
(left,top) is the upper left corner of the rectangle, and
(right,bottom) is
its lower right
corner.
Returns: On r0: 0 on success, -1 on failure
Example:
.text
.word 0
calls $0, .initgraph
pushl $10
pushl $10
pushl $490
pushl $390
calls $4, .rectangle