@Martin: I do have KSoftSeq installed and it works, thanks. Was wondering which MIDI interface to use with PRBoom...
@Jochen: I tried 'Rocks and Diamonds' ver 4.3.2 and it makes noises and doesn't hang, but I don't know what SDL it uses - I have 4 different DLL's on my system for SDL: sdl2.dll, sdl2200.dll, sdl12.dll, and sdl120.dll. Can you recommend an app to test that you know uses the same SDL as PRBoom?
Regards,