News Commodore 64 gets a true Full-HD HDMI plus stereo sound daughterboard

"Stereo" needs a bit of an explanation. In the default setup, it digitises the audio from the single SID chip and outputs it to both audio channels. It does not have a second SID-chip on board (neither real nor emulated).
It does however have input headers for a second SID chip, if one would have mounted one inside.

I suppose it also emulates sprites (with support for multiplexing controlled by software) and changing the video mode at an arbitrary raster line.
I am curious to see how well it handles various common tricks that people have made the SID-chip do but which it hadn't been originally designed for.
Examples include suppressing video output for several raster lines, sprites in the top/bottom/left/right borders, and changing the video read start position (for fast scrolling). There are many commercial games that do these things, not just scene demos.
 
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