mame/docs/source/tools/othertools.rst

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Other tools included with MAME
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ledutil.exe/ledutil.sh
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On Microsoft Windows, ledutil.exe can take control of your keyboard LEDs to mirror those that were present on some early arcade games (e.g. Asteroids)
Start **ledutil.exe** from the command line to enable LED handling. Run **ledutil.exe -kill** to stop the handler.
On SDLMAME platforms such as Mac OS X and Linux, **ledutil.sh** can be used. Use **ledutil.sh -a** to have it automatically close when you exit SDLMAME.
Developer-focused tools included with MAME
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pngcmp
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This tool is used in regression testing to compare PNG screenshot results with the runtest.cmd script found in the source archive. This script works only on Microsoft Windows.
nltool
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Discrete component conversion tool.
nlwav
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Discrete component conversion and testing tool.
jedutil
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PAL/PLA/PLD/GAL dump handling tool. It can convert between the industry-standard JED format and MAME's proprietary packed binary format and it can show logic equations for the types of devices it knows the internal logic of.
ldresample
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This tool recompresses video data for laserdisc and VHS dumps.
ldverify
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This tool is used for comparing laserdisc or VHS CHD images with the source AVI.
romcmp
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This tool is used to perform basic data comparisons and integrity checks on binary dumps. With the -h switch, it can also be used to calculate hash functions.
unidasm
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Universal disassembler for many of the architectures supported in MAME.