Most likely, there are multiple revisions of Super Sensor IV.

Re: Morsch: One I know of that is emulated, is Mephisto Modena.
https://www.schach-computer.info/wik...ephisto_Modena
Berger sent me the romdump of CXG Dominator a while ago, it's an older version of the same program in Modena. The chesscomputer doesn't interest me at all so I don't have motivation to write the emulation for it :P
https://www.schach-computer.info/wik...hinx_Dominator

Re: Saitek modules: Indeed, the chessboard has its own CPU. Even the manual says that with a module inserted it becomes a dual-CPU system. However, that may be marketing blabla lies, and maybe the module takes over the complete bus and directly controls the chessboard (instead of communicating with the other CPU). I haven't looked into it thoroughly yet.