The MAME License

The MAME project as a whole is distributed under the terms of the GNU General Public License, version 2 or later <http://opensource.org/licenses/GPL-2.0>_ (GPL-2.0+), since it contains code made available under multiple GPL-compatible licenses. A great majority of files (over 90% including core files) are under the 3-Clause BSD License <http://opensource.org/licenses/BSD-3-Clause>_ and we would encourage new contributors to distribute files under this license.

Please note that MAME is a registered trademark of Gregory Ember, and permission is required to use the “MAME” name, logo, or wordmark.

Copyright (c) 1997-2026  MAMEDev and contributors

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

Please see the license information <https://github.com/mamedev/mame/blob/master/COPYING>_ for further details.