I find Ghidra and compile Dev version for some reason I can't recall. I think so I could load third party CPUs.
'''H8300H is not supported in Ghidra'''. I find a plugin, https://github.com/shizmob/ghidra-h8-300 and try to compile that and load in Ghidra. It won't compile though - Later I also tried https://github.com/carllom/sleigh-h8 which I also don't get running in Ghidra -
==Cutter -==