Changes
MAME
,[[File:Mess sysinfo.png|thumb|upright=1.2|The MESS system info box for the CPC6128]]
[[File:Mess gx4000 pang.png|thumb|upright=1.2|MESS also has (still somewhat glitchy) support for the GX4000 and CPC+ series.]]
'''MESS''' (Multi Emulator Super System) is an emulator for vintage computers, gaming consoles, chess computers, and calculators. It is a descendant of the MAME arcade emulation project and just like MAME, the most important goal of MESS is highly accurate emulation, not speed. MESS and MAME are mainly preservation projects that aim to reproduce the behaviour of the real hardware perfectly, so performance may be slightly worse than many dedicated CPC emulators.
==Supported systems and compatibility==
Currently, [http://www.progettoemma.net/mess/sysset.php over 680 760 systems are supported], including the CPC and CPC Plus ranges and the GX4000. This is probably the main reason for using MESS, that a : A single download is enough to emulate more or less every home computer and gaming console that ever existed in the late 1970s and 1980s—provided one can find a ROM set that works (see below). MESS does not have the depth of other emulators, but it sure has enormous breadth. Its flexible input mapping and MAME-compatible pixel shader effects make MESS particularly suited for gaming.
MESS runs on Windows, Mac OS X, Linux, and FreeBSD. If you also use MAME, you may want to get [http://mamedev.emulab.it/haze/latest-ume-mame-mess-binaries UME] instead, which combines MESS and MAME into a single executable with a shared configuration file, <tt>ume.ini</tt>.
==Command line arguments==
==Remaining issues with CPC emulation==
*MESS may fail to read DSK images that use with certain kinds of copy protection. (Speedlock seems to work fine though.)
*MESS cannot write to disc images in DSK format; only MFI (MESS floppy image) and MFM (HxCFloppyEmulator floppy image) are supported for writing.
*Some demo tricks may be broken in MESS, e.g. overscan pictures are horizontally misaligned (i.e., shifted to the right).
*Loading extension ROMs is supposedly supported, but it is difficult to figure out the correct commandline parameters. The documentation is pretty useless here.
*CPC+/GX4000 emulation still has some obvious graphics glitches.
