Created Signatures (markdown)

Signatures.md

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+While games can be added to the server without them, it is recommended adding some signature DAT files beforehand to allow for better matching of ROMs to games.
+
+These signature DAT files contain a list of titles with hashes for many of the ROM images that have been found by the community.
+
+Currently supported DAT's:
+* TOSEC: https://www.tosecdev.org/downloads/category/56-2023-01-23
+* MAME Arcade and MAME Mess: https://www.progettosnaps.net/dats/MAME
+
+If there are other DAT's you'd like to see support for, please raise an issue with a link to the DAT's.
+
+## Adding signature DAT files
+### TOSEC
+1. Download the DAT files from the source website. For example; from https://www.tosecdev.org/downloads/category/56-2023-01-23
+2. Extract the archive
+3. Copy the DAT files to ``~/.gaseous-server/Data/Signatures/TOSEC/``
+
+### MAME Arcade
+1. Download the DAT files from the source website. For example; from https://www.progettosnaps.net/dats/MAME
+2. Extract the archive
+3. Copy the file name ``MAME 0.257 (arcade).dat`` files to ``~/.gaseous-server/Data/Signatures/MAME Arcade/``
+
+### MAME MESS
+1. Download the DAT files from the source website. For example; from https://www.progettosnaps.net/dats/MAME
+2. Extract the archive
+3. Copy the file name ``MAME 0.257 (mess).dat`` files to ``~/.gaseous-server/Data/Signatures/MAME MESS/``