Some of the people who wrote the games on ROMs get upset when they are available for free or sold on the Internet without paying them royalties.
The source code of MAME was done by reverse engineering the ROMs to figure out how they work and emulate the hardware in the arcade machines. MAME emulates a lot of processors and special chips and not all of the code was available for commercial use. It has to be rewritten so that it was different code.
Comments
Some of the people who wrote the games on ROMs get upset when they are available for free or sold on the Internet without paying them royalties.
The source code of MAME was done by reverse engineering the ROMs to figure out how they work and emulate the hardware in the arcade machines. MAME emulates a lot of processors and special chips and not all of the code was available for commercial use. It has to be rewritten so that it was different code.
If I recall MESS is included with MAME now as part of some merge. https://github.com/jsmess/jsmess
The JSMESS project has been integrated into the upstream MAME repository at https://github.com/mamedev/mame and this repository is now defunct. Follow the instructions at https://raw.githubusercontent.com/mamedev/mame/master/docs/e... to do an Emscripten compile with unmodified MAME source.