Could someone elaborate on why RTG can not genlock?
Is it the 31.5 khz frequency?
Genlocking requires that the syncs/video of the input and source align, so .. the GENerated video is LOCKed to in the input video.
The amiga has extra singals on it's RGB & Video connector (#XCLK & #PIXELSW) to specifically handle this.
Any RTG card would need these extra signals as well so it can be controlled externally, and yes, your source and generated video (RTG) would also have to be the same frequency (NTSC/PAL/VGA etc..) if the two aren't the same, they can't align properly
