Description: Sets the video mode to NTSC/60hz or PAL/50hz based on the <TvType> value. Even though SecondBASIC will default to the NTSC resolution, it is recommended to still use the TvSet command to set the display to NTSC. If it isn't, there will be garbage data displayed on the lower scroll planes due to the PAL resolution.
Required. Valid values are 0 for NTSC, or 1 for PAL.