A few weeks ago the opl emulator section was cleaned up doing the same as you did.
compat and fast are only 2 opl emulators in the SVN and the next release will be shipped as such.
here is the svn revision
r3490 | qbix79 | 2009-11-03 21:17:42 +0100 (Tue, 03 Nov 2009) | 2 lines
Changed paths:
M /dosbox/trunk/src/dosbox.cpp
M /dosbox/trunk/src/hardware/Makefile.am
M...
