FillRect

Draws a filled rectangle to the screen, using a specified color.

Address: $021220

Inputs:

hl: Top-left X coordinate of the rectangle.
de: Bottom-right X coordinate of the rectangle.
b: Top-left Y coordinate of the rectangle.
c: Bottom-right Y coordinate of the rectangle.
Value at fillRectColor contains 16-bit color to draw with.

Outputs:

Draws to the screen.

Destroys:

af