- finally managed to get rid of the DWORD type.

This one was particularly nasty because Windows also defines a DWORD, but in Windows it is an unsigned long, not an unsigned int so changing types caused type conflicts and not all could be removed.
Those referring to the Windows type have to be kept, fortunately they are mostly in the Win32 directory, with a handful of exceptions elsewhere.

src/oplsynth/dosbox/opl.cpp

@@ -34,7 +34,7 @@ static FRandom pr_opl;
 
 typedef uintptr_t	Bitu;
 typedef intptr_t	Bits;
-typedef DWORD		Bit32u;
+typedef uint32_t	Bit32u;
 typedef int32_t		Bit32s;
 typedef uint16_t	Bit16u;
 typedef int16_t		Bit16s;