A new version of XPMCK (an MML compiler kit) is available, with some Gameboy related items in the changelog..
* Added a more convenient syntax for writing volume macros.
* Added an alternative volume control mode for the Gameboy target.
* Added the ability to set the number of sweep steps for @te on the Gameboy.
* Added a way of quickly offsetting or scaling macro values.
* Fixed a bug in the handling of @ve which would cause compilation to fail if a positive direction was set.
The "alternative volume control" mentioned above is the so-called "zombie mode".
Link: http://jiggawatt.org/muzak/xpmck/
* Added a more convenient syntax for writing volume macros.
* Added an alternative volume control mode for the Gameboy target.
* Added the ability to set the number of sweep steps for @te on the Gameboy.
* Added a way of quickly offsetting or scaling macro values.
* Fixed a bug in the handling of @ve which would cause compilation to fail if a positive direction was set.
The "alternative volume control" mentioned above is the so-called "zombie mode".
Link: http://jiggawatt.org/muzak/xpmck/