I've updated the link above with guides for both 32bit and 64bit MAME cross compiles. Both verified and working on my setup, and confirmed by at least one other person. For me it takes an ~8 hour compile on my RPi4 overclocked to 2.0GHz down to a ~1 hour compile on my Core i5 machine.

I've added some links to scripts as well to hopefully make it a bit easier for people to get going. Still not automated end-to-end, but enough for someone familiar with package installation under Debian/Ubuntu to build a working cross compile environment.

I'm fairly confident this could be modified for anything running on RPi that uses gcc or g++ to compile, as long as the compile time headers and link time libraries were known, or could be discovered.

For example, if you want to find the dependencies for, say, ScummVM, install the "apt-rdepends" package on your RPi, and run:

apt-rdepends scummvm | grep -v ^' ' | sort | uniq | tr '\n' ' '

They're your runtime dependencies. To find build dependencies, ensure there's a matching "deb-src" repo for every "deb" repo in your /etc/apt/sources.list and your /etc/apt/sources.list/*list files, then run:

sudo apt-get build-dep scummvm

And log the files installed. You can find all dev packages installed with something like:

dpkg -l | grep '\-dev' | awk '{print $2}' | awk -F ':' '{print $1}

That would probably get you 99% of the way there. Ditto for anything where an older version is in the native Debian/Raspbian repos, and you want to build a much newer version.

@barbudreadmon said in Auto aspect ratio for vertical games?:

@strells said in Auto aspect ratio for vertical games?:

I left integer scale turned off so that the image, whether vertical or landscape, reaches the edge of my Arcade1Up 17

Just be aware that not enabling integer scaling is not recommended because it will cause gfx issues due to bad nearest rounding, those gfx issues being more or less noticeable depending on the context.

Great. I did not know that. Thank you for the heads up!

@mitu Thaaaaaaaat did it! Thanks so much!

@stoney66 well - switched the roms and now they work. Centipede, Missile Command, Golden Tee 2 are all working now under AdvMame. Marble Madness is still unhappy, but I would assume that's still just a rom issue. I think this issue is likely resolved now. Thank you everyone for your help! @mahoneyt944 and @stoney66

Thanks all above for the help. I was able to clear that in the mame2003 core, but for some reason, mame 2010 was not as cooperative. It automatically binds the mame menus to the L3/R3 thumbstick buttons and can't be cleared (I tried using the same method as mame 2003, but to no avail). But I came up with an easier work around for both. I simply unbound my l2/r2 and l3/r3 buttons from my controllers themselves. I find there is no real need for any of these to be used for classic gaming, as all you really need are the shoulder and face buttons. So that uncomplicated things, and the menus are now no longer accessible. Easy peazy.

actually fixed it, with an entire reimage and 1st install again... dont know what happened. but thanks anyway..

@retropiecorcoran Lol... that's pretty nice! Thanks!

@dankcushions Ahh thank you, that must be what the issue is. :)

@blackshadow13 Apart from samples for some games, there's also those that have CHD files for them. I saw a set and it was huge and well over 120 GB. If you do have to get a set i recommend a macchanger and VPN for pc anonymity. You know because Nintendo has been harming emulation and is trying to label it as piracy.

Maybe the particular ROM became corrupted.
Maybe that particular ROM isn't correct for the core, but was "close enough" (not really a thing) for a slightly different core? (e.g. MAME2003, MAME2003plus, MAME2010, etc.) There could be a variety of reasons. I agree, specific logs are the best "next step".

@alphabetapie as always, the docs explain this:
https://retropie.org.uk/docs/lr-mame2003/#nag-screen
https://retropie.org.uk/docs/lr-mame2003/#skip-warnings-screen

you'll note both point to the core options doc which show where the per-rom core options files are stored. it is not the same file as retroarch configs/overrides.

@mediamogul
It takes a lot of imagination to turn it into a football game , but it was the idea. 😁

@rott42 said in Cant get 2 games running, killer instinct and wind jammers:

@adambegood KI 1&2 run for me on lr-mame2003, but graphically compromised, slow and lag. I use pi4.

Fair enough - I thought there was certainly some issue with them.

@romstar said in What's the correct aspect ratio I should be using as a config for a HAPP / VISION PRO 19" LCD arcade monitor for MAME Horizontal / Vertical games:

I changed the bottom line to mame2003_tate_mode = "enabled" which ultimately resolved my issue. now The vertical game is finally displaying the way it should on my HAPP Vision pro monitor mounted vertical !! At some point I'd like to build a vertical only list of games and have the menu / retropi running exclusively in vertical mode.

I knew it would change your life. I would not recommend trying to make the whole of retropie itself work in vertical mode yet, though. I stayed with my rotating monitor because rotating emulationstation causes performance issues. I believe it also became more difficult to rotate emulationstation on the Pi4 because the option was deprecated. I stayed with my Pi3b for my vertical MAME games for that reason and hope that a good solution for a fully vertical system presents itself later.

@dankcushions I wanted to also ask you what type of controller you use with your pi when you play MAME (and FBA & CPS games). Is it wired or wireless? What specific controller works best with arcade games?

The reason I ask is the way they designed the pi is awkward with the ports not giving us a traditional front or back so I don’t wanna fool with wires bending over the console.

@mitu said in Qix (lr-2003-Plus) .78 roms (unmerged):

@agrajag said in Qix (lr-2003-Plus) .78 roms (unmerged):

Thank you guys for all the assistance. I have NO idea what step created those huge .cfg files. I'll have to keep an eye out for that.

You used 'Save Configuration' in RetroArch's RGUI. Either that or you enabled 'Save Configuration on Exit' from the RGUI.

That is ABSOLUTELY it. I've been trying to figure out (without luck) through trial and ERROR, how to get to where I can cut off the initial post period of some of the roms (like Defender) and auto-load the "clean" state as I used to do on my PC version of MAME.

Wow. Glad to have a solution and a reason.

@mitu I'm hoping to find a video or specific example of the steps to saving the state in say, Pepper II (or any game with a decently long POST) and then the settings to auto-load that post-POST save state each time the game launches.

I THINK I may have gotten the Retroarch settings correct, but don't see anything that says something like, "On load, use this save state for this game/core".

@barbudreadmon Looking into this now.