I suppose I did. Use the same sound options for all other DOS games, never met such an error before.

Hello, I've been trying to start The 7th Guest in DosBox but without result. The emulator crashes almost instantly after starting the game, writing to a log file "Exit to Error: CPU:GRP5:Illegal Call 7" if a normal CPU core was used, or "DynCor: Illegal option 0*ff" if the core was set to dynamic. …