I appreciate all the hard work you do. Really do. Had you put what you had already found in your initial post then I wouldn't have posted it or I may have looked harder for you.
I am sorry I was not able to find the ROM. It's not something that anyone other than the person who makes the QL-SD really needs. As I mentioned he would be the best place to get the ROM from.
The QL emulators do not appear to emulate the QL-SD hardware and so don't require the ROM. Instead they seem able to use QL-SD images because they have parts of the same software which is in the ROM (i.e. the file system) compiled into the emulator (e.g. https://github.com/SinclairQL/uqlx-fork
Maybe a good QL enthusiast can rebuild the ROM for you now they know where the sources are.
Sorgelig wrote:this is for MiST! As i've wrote above, there is a chance that MiST version of ROM is specially tweaked exactly for MiST way of work with SD card.
I posted it on the chance you may not know about it and WHEN you are able to get QL-SD compatibility in MiSTer you'd have something to try.