Rebuilding MAME romsets - for MAME 2003-Plus on RetroPie 4.8

This will run through how to rebuild romsets for the specific version that MAME 2003-Plus needs. The principle will also rebuild to any given romset version. Using this method should make sure that all the games load successfully in RetroPie with MAME 2003-Plus.

This is showing MAME 2003-Plus because its designed with the Raspberry Pi in mind, as well as supporting a wide range of games from different versions of MAME.

** The bit about the Neo Geo bios at about 25mins in, as its included in the main MAME romsets anyway the games will work fine, you just need the unibios version if you want that specific one. *****

Contents (To avoid you watching all 50+mins!)

00:03:22 - Example of what happens when you dont have the right romsets
00:04:50 - Make sure you have MAME 2003-Plus installed
00:07:00 - MAME romset versions needed for a given emulator (Important)
00:11:33 - Why choose to use MAME 2003-Plus on a Pi?
00:12:50 - Which games will work with MAME 2003-Plus?
00:15:47 - Obtain the .DAT file (Important)
00:18:20 - Obtain the .DAT file for the specific version of MAME 2003-Plus you have (Dont just download the first one you find) This also shows where to find and/or generate that.
00:21:50 - Obtain MAME romsets to build your new set from
00:26:05 - What are Parent and Clone romsets?
00:27:45 - What are split / merged / non-merged romsets?
00:33:20 - The process to rebuild romsets with Clrmamepro (Important)
00:47:47 - Size of MAME 2003-Plus non-merged romsets
00:49:27 - Showing that any romset now rebuilt works with MAME 2003-Plus

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MAME basics with RetroPie
https://retropie.org.uk/forum/topic/2...

Romset versions for different emulators
https://retropie.org.uk/docs/MAME/#lr...

MAME 2003-Plus
https://github.com/libretro/mame2003-...
https://docs.libretro.com/library/mam...

MAME 2003-Plus compatibility list
https://buildbot.libretro.com/compati...

MAME Versions
https://www.mamedev.org/oldrel.html

MAME Romset details
http://www.progettoemma.net/
http://adb.arcadeitalia.net/

Split vs Merged vs Non-Merged
https://wiki.romvault.com/lib/exe/fet...

Clrmamepro
https://mamedev.emulab.it/clrmamepro/

Rebuilding Options
https://mamedev.emulab.it/clrmamepro/...