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Hi folks. New to the Arpicade scene. Hoping i can get some inside... Basically. I'm running Arpicade on an 15khz Horizontal Arcade Monitor. Raspberry pi into HDMI>VGA. VGA breakout straight into the arcade monitor. Now thankfully the menu itself actually displays perfectly fine. Minus some color adjustments which i'll do after the fact... Seemingly though whenever i try to launch a game. Splatterhouse for example. it'll be all jittery and messed up. Does this have to do with me using Mame 139? Am i meant to do something that i perhaps overlooked or skipped over? I feel awfully dumb not being able to figure it out myself here.

Not sure which version of ARpiCADE you're running but it uses many different low resolutions... if you have a sync adjustment on your monitor you may be able to tweak it to the point where all the resolutions sync OK.

I wouldn't recommend MAME 139 except as a last resort.  MAME 172 is a good starting point for Pi3, MAME 275 on Pi5

Not sure which version of ARpiCADE you're running but it uses many different low resolutions... if you have a sync adjustment on your monitor you may be able to tweak it to the point where all the resolutions sync OK.

I wouldn't recommend MAME 139 except as a last resort.  MAME 172 is a good starting point for Pi3, MAME 275 on Pi5

Hi Dee2eR. Thank you for the work on the project and for responding. I'm using the version 3.X.7 - I'll see if i can find the version you recommended but i don't see Splatterhouse on the Compatibility list as it is. so that's my fault!

It's seems i've managed to fair no better. Using Mame 172. I've tested Space Harrier. Splatterhouse. and Haunted Castle. Space Harrier seems to be the only one i can reasonable get 'stable' but never aligned properly. All the games only display in green/black. However the menu displays perfectly fine. Aswell as the F4 menu.

Not sure what's going on there.  What is the HDMI to VGA you're using?  Is it known good?  Did you combine the H and V syncs into C-sync?  (the sync combination on the RaspberryJAMMA uses XOR gates and if you are just twisting the wires together it may or may not work...)

Worse comes to worse you may need to disable some or all of the resolution switching and jsut use what works with your setup.  I only test ARpiCADE with my RaspberryJAMMA hardware so I'm not real sure what is going wrong.

Hi Dee2eR. Thanks for the reply. I've used this HDMI to VGA before when hooking up a Taito Type x 3 to a CRT arcade monitor and know it work appropriately. the colours I'm assuming are a resolution issue which is why the menu will sync properly and look proper but the games won't.. Could you tell me how i might disable all the resolutions except 240P or 480i?

Edit UPDATE: After having added Pac-Mania into the selection to check on vertical games. It seemly worked properly. For fun i switched it to use a vertical monitor. And all the Horizontal games would work perfectly. but the Vertical ones would glitch out. vice versa. if it's on horizontal. the Vertical games work. and if it's on vertical. the horizontal games work. I'll redo the breakout cable to see if it was on my end.

You'l need to edit /boot/launchers/resSwitch.sh (if you don't have any scripting experience it may look overwhelming but it shouldn't be too hard).  It's not as straightforward as just 240p and 480i though... there's a bunch of different 240p resolutions in use, covering many refresh rates, 480i + 240p@60 is probably a safe place to start if you don't want to just remove the problem ones.

If your HDMI to VGA is just a DAC it should be able to handle the various refresh rates used by old games, if it has some sort of image processing it is probably the cause of your issue.  You really want something that outputs the same as what it gets, just converts it to analog.  As far as I'm aware (I'm no expert on the newer stuff, you prob know better than me) Taito Type X3 would need a scan converter, or downscaler and/or interlacer for low res monitors which isn't what you want for a system that can output low res natively.

The colours may be because you don't have an RGB amp in the video chain, VGA uses lower voltage RGB than typical JAMMA arcade boards.  It will look fine on some monitors but be dark on others.  Usually an arcade monitor will have enough brightness adjustment to work fine with the lower voltage RGB, but not all will.  EDIT: the colour issue you may mean the green not syncing image?  That isn't to do with an RGB amp, obviously...

No surprise rotated games work, they run at the same res/refresh as the menu.  Hori game on hori monitor (or vert on vert) will run at the original games refresh rate (or as close as it can).