RetroTINK-4K Custom EDID Instructions
The RT4K normally loads its default EDID
for the HDMI® input port unless the file ‘edid.bin’
is present in the root of the SD card.
The 'edid.bin'
should be a direct binary dump of a 256-byte EDID structure. You can use a tool
such as:
https://www.analogway.com/emea/products/software-tools/aw-edid-editor/
or
https://www.monitortests.com/forum/Thread-Custom-Resolution-Utility-CRU
to generate a custom EDID in this format.