Difference between revisions of "MAME"

Revision as of 10:16, 31 May 2015

The MAME system info box for the CPC6128

MAME also has (still somewhat glitchy) support for the GX4000 and CPC+ series. Note the strange blue bar at the bottom in Pang.

MAME (Multiple Arcade Machine Emulator) is an emulator for arcade games, vintage computers, gaming consoles, chess computers, calculators, etc. MAME 0.162 merged the previously separate MAME and MESS (Multi Emulator Super System) codebases into one, so that one executable now combines the emulation capabilities of pre-0.162 MAME/MESS.

The most important goal of MAME is highly accurate emulation, not speed. MAME is mainly a preservation project that aims to reproduce the behaviour of the real hardware perfectly, so performance may be slightly worse than many dedicated CPC emulators.

Emulated systems

Currently, over a thousand systems are supported by MAME, including the CPC and CPC Plus ranges and the GX4000. This is probably the main reason for using MAME: 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).

MAME does not have the depth of other CPC emulators, but it sure has enormous breadth. Its flexible input mapping and pixel shader effects make MAME particularly suited for gaming.

Installation

MAME runs on Windows, Mac OS X, Linux, and FreeBSD. You can get Windows binaries from mamedev.org.

On OS X, you can install MAME via Homebrew:

brew tap homebrew/games
brew install mame

On Windows and OS X, the MAME binary is called mame, on Linux sdlmame. On some Linux distros such as Arch Linux you have to use absolute paths for disk images or ROMs because /usr/bin/sdlmame is a wrapper script that will cd to the directory with the MAME binary. Or you could simply skip the wrapper script and run /usr/share/sdlmame/sdlmame directly:

alias mame=/usr/share/sdlmame/sdlmame

Command line arguments

Typical command line to start MAME in CPC mode:

mame cpc6128 -skip_gameinfo -window -flop1 /path/to/disk.dsk

Device options for the CPC from sysinfo.dat

Supported file types can also be shown with the "-listmedia" command line option.

You can use zipped disk images too. If there is more than one DSK image in the zip file, treat the zip file like a directory, e.g.

mame cpc6128 -flop1 disk.zip/disk0.dsk

Keyboard layouts

MAME supports two keyboard modes:

• emulated (the default; keys are assigned based on key position on the emulated hardware)
• natural (command line option "-natural"; based on the character generated by a key, e.g. pressing "z" will always generate a "z" on the emulated system)

To use a German keyboard in emulated keyboard mode, start MAME e.g. with (key map path on Linux):

mame cpc6128 -keymap -keymap_file /usr/share/sdlmess/keymaps/km-de.txt

In emulated mode, keys can also be remapped in the emulator menu. First press Scroll Lock to enable the MAME control keys, then Tab to open the menu, and finally select Input (this system). Return, Esc clears an assigned key.

Note that the Delete and Backspace keys are swapped on the emulated keyboard because of the CPC keyboard layout. So you may want to reassign those. Escape on the CPC is mapped to the key left of "1" on the PC keyboard. Alt-Enter switches between windowed and full screen mode.

ROMs and extension hardware

CPC ROMs for MAME. Just unzip the file and move the ZIPs inside into the MESS ROM folder.

General notes about MAME and ROMs

Some MAME ROMs have parent ROMs that also need to be installed. E.g., cpc6128.zip also requires cpc464.zip to run. (See the links section for CPC ROM files for MAME.)

ROMs often only work with a specific version of MAME. This does not seem to affect CPC ROMs, but other systems sometimes give an error message when ROM filenames or checksums do not match what MAME expected.

Slot options (extension hardware)

You can get a list of slot options with

mame cpc6128 -lslot

These are (as of MAME 0.162):

• for "-centronics"

MAME with the Dobbertin Smart Watch ROM loaded (-exp smartwatch)

• for "-exp"

Loading external ROMs

The ROM Box expansion can be used to load external ROMs such as MAXAM:

mame cpc6128 -exp rom -rom1 /path/to/MAXAM.ROM

Up to 8 external ROMs (-rom1 to -rom8) are supported this way.

GUI front-ends

Various GUI front-ends for MAME exist for Windows, Linux, and OS X—see this list: [1]

MessMenu on OS X with a CPC ROM selected. Currently, seven different CPC models are supported, including some regional variants (French and Swedish).

CRT simulation

GLSL shader example

HLSL "1980s" shader (detail)

MAME can use shaders to simulate typical CRT graphics artifacts such as scanlines, colors bleeding into each other, jitter, and display curvature.

Some example configurations:

• Windows (using HLSL shaders)
  • A scripted setup with separate "1980s" and "1990s" CRT configs: [2] (huge post is halfway down the page)
  • A German shader tutorial: [3]
• Linux (using GLSL shaders): MAME tutorial [4]

Remaining issues with CPC emulation

• MAME may fail to read DSK images with certain kinds of copy protection. Speedlock seems to work fine though.
• MAME 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 MAME, e.g. overscan pictures are horizontally misaligned (i.e., shifted to the right).
• CPC+/GX4000 emulation still has some obvious graphics glitches.
• The emulated CPC464 has the AMSDOS ROM loaded which is a problem with early 464-only programs that rely on the 464's larger free memory.

JSMESS, a JavaScript port

There is an experimental port to JavaScript, see the JSMESS article for details.

Links

• MAME at the English-language Wikipedia
• Official site
• MESS user's manual
• CPC ROMs for MAME