I don't know but it could be something as simple as a reserved memory space that...

		cptskippy on June 11, 2021 \| parent \| context \| favorite \| on: OpenRGB: Open-source RGB lighting control I don't know but it could be something as simple as a reserved memory space that you write to. They have a ROM that can be read to retrieve the the JEDEC and XMP Profiles, so perhaps there's some I/O there?