mameCfg

Recomend this way for doing overrides. In Retroarch we can set a single shared default.cfg but then we could apply changes for Spinner, trackball, etc. so I am OK with propagating default using Powershell. Note we are copying old title.cfg override files back and these could be crappy for this setup. Not sure what to do. We can always reset in mame menu, it's just that these can be different for each machine,

We need to set up the following general overrides for two sets of joysticks

1. mamemenu -> select + R2

2. P1 Button 1 -> B

3. P1 Button 2-> A

4. P1 Button 3-> Y

5. P1 Button 4-> X

6. P2 Button 1-> B

7. P2 Button 2-> A

8. P2 Button 3-> Y

9. P2 Button 4-> X

We do NOT need or want the P2 Start override since we have two sets of controls.

https://retropie.org.uk/forum/topic/32159/mame2003-default-cfg

mame cfg settings files

1. Always end with .cfg
2. Always stored in a mame2003\cfg\ folder under roms share.
3. In roms share under roms\mame-librettro scattered all over (never in config share)
4. Always stored in binary not text, so not human readable.

default.cfg

1. Mame General Settings are always stored in default.cfg
2. default.cfg always start with MAMEDEF at start of file.
3. These are per rom dir, so there is no true General Mame Settings file that I can find.
4. /romdir/mame2003/cfg/default.cfg
5. I have 26 of these on Centipede. I doubt I have one in each dir, so I doubt there are any truly general settings anywhere for mame config.
6. Always 9kb (+3 Times larger than title.cfg files.
7. UI Select and Cancel can be changed in this file only. NOT in title.cfg.
8. Has Trackball, Pedal, Lightgun, Paddle, P1-P9 controls. Every possible control ever invented are in here, which is why the default.cfg is so much larger than any title.cfg
9. To truly make global we would need to replicate this file across every single rom dir.

title.cfg

1. Per Game Override Settings are stored in these.
2. Match rom title name in /mame2003/cfg subdir of rom.
3. 1-3kb (Smaller than default.cfg)
4. Always start with MAMECFG at start of file.