ScummVM

Looks good now, committed as is.

I think we shouldn't bother adding this to the usage text. We just have to
finally overhaul the music/midi driver system to allow passing driver
settings in a formalized way (so no more env variable tricks or custom
config strings / command line stuff, and also the ability to change this
via the GUI).

Update patch to fix formatting, add README section on configuration.

I don't see any reference to the equivalent alsa_port in
base/commandLine.cpp, or for that matter anywhere outside alsa.cpp and the
REAME, so I'm not certain what you expect to be added to the usage help. To
be honest, I don'e even know how the ConfMan objects correspond to
commandline options.
File Added: backends_midi_dmedia.patch

Looks pretty good besides one minor code formatting issue at line "if
(0==strcmp(var, portName)) {".

But you also need to add description of that dmedia_port to the readme and
also make it IRIX-specific at compile time in our scummvm usage help.