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Welcome to The Official Site of the MAME Development Team

What is MAME

MAME is a multi-purpose emulation framework.

MAME's purpose is to preserve decades of software history. As electronic technology continues to rush forward, MAME prevents this important "vintage" software from being lost and forgotten. This is achieved by documenting the hardware and how it functions. The source code to MAME serves as this documentation. The fact that the software is usable serves primarily to validate the accuracy of the documentation (how else can you prove that you have recreated the hardware faithfully?). Over time, MAME (originally stood for Multiple Arcade Machine Emulator) absorbed the sister-project MESS (Multi Emulator Super System), so MAME now documents a wide variety of (mostly vintage) computers, video game consoles and calculators, in addition to the arcade video games that were its initial focus.


The MAME project as a whole is distributed under the terms of the GNU General Public License, 2 (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 BSD-3-Clause License 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.

MAME 0.126

06 Jul 2008

At last, it is time for a full MAME update: grab MAME 0.126 from the Latest Release page.

In addition to the usual large pile of changes and improvements, there are several big changes come along with this release that you should be aware of:

  1. The new universal recompiler engine is now live and running. Both the MIPS3 and PowerPC CPU cores have been ported over to it. Most games should be working about as well as they did before, and should be at full speed on both 32-bit and 64-bit Intel processors.

  2. The MAME debugger is now included in all builds; just add the -debug option and you can use it from any 0.126 or later binary. This means the focus of the "debug build" is now to enable assertions and to make it easier to debug the MAME code itself.

  3. The cheat engine is currently undergoing some major renovations. It is largely functional but still has some rough edges. If there are specific things wrong with it, please report the bugs over at MAMETesters, so that they get fixed during the 0.127 development cycle.

Hopefully we'll get back to a normal 1 month development cycle starting with the next release. In the meantime, enjoy the update!

MAME 0.125u9

03 Jul 2008

Just posted over at the Source Updates page is hopefully the final update to the MAME 0.125 dev cycle. It's been a long road! Now is the time to check this out and ensure that all your favorites are still in fine working order before we lock down for MAME 0.126.

MAME 0.125u8

26 Jun 2008

Oops, a major bug crept into the last release at the last second, so without further ado, please grab the small update to MAME 0.125u8 from the Source Updates page. There will still be a u9 next week, and hopefully a 0.126 to follow shortly thereafter.

MAME 0.125u7

26 Jun 2008

Time for the weekly MAME update: get MAME 0.125u7 over at the Source Updates page. I anticipate a u8 next week followed shortly thereafter with MAME 0.126, so now would be a great time to verify that there are no showstoppers in any games you care about!

An important note about this release: inclusion of debugging support in MAME is no longer optional. That is, you can still disable it (using the -nodebug option, or setting 'debug' to 0 in your mame.ini file), but you can no longer compile without it. This will give a small-ish performance hit (under 5% in most cases) in exchange for always being able to pull up the debugger and will reduce the test matrix necessary to verify MAME's behavior.

Note that due to a slight oversight, the debugger is enabled by default in this build, so you may need to explicitly turn it off. This will default to off in u8.

MAME 0.125u6

17 Jun 2008

The latest in the now long-running series of updates to MAME 0.125 is now available. There will likely be at least two more intermediate updates before 0.126, due to the large number of changes in the dynamic recompilers and elsewhere in the system. So hang in there and please give these updates a try to ensure that everything still works as expected. As usual, report your bugs over at MAMETesters.

MAME 0.125u5

12 Jun 2008

Get the latest update from the Source Updates page. It's even possible that -listxml is working again. ;)

MAME 0.125u4

05 Jun 2008

Get it while it's hot from: Source Updates.

I'll also mention there are a couple of new interesting wiki articles: one from R. Belmont on how tilemaps work, and one from Mr. Do! on how to write .lay files for the artwork system. If anyone would like wiki access to write an article, use the contact form to send a proposal and request to the team. If you haven't checked out the wiki in a while, you may find there's a lot more content there than there used to be!