Function SetRenderingParameters

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Prototype	`void SetRenderingParameters(u8 firstScanlineToRender, u8 verticalLinesToRender);`
Description	Dynamically set the number of scanlines to render and also from which scanline rendering should start. This function can be used to temporarily lower the kernel's CPU usage.
Parameters	firstScanlineToRender: The NTSC scanline number rendering should start from. Lines starts at zero during VSYNC and goes up to 262. This parameter is usually increased when verticalLinesToRender is lowered to keep the image centered vertically. Default is 20. verticalLinesToRender: The number of lines to render vertically. Must be >= 1 and <= 224.
Returns	Void
Video Modes	All
Since	V3.3
Notes	Don't set the lines to render to zero or calls to WaitVsync() will hang.

Example:

//set first scanline to render to 112, and render 1 line
SetRenderingParameters(112, 1);