I spent some time today trying to get retropie to output a good height to my monitor. I started with a clean install and dropped tmnt in my mame folder. I made sure that everything work fine on my tv before moving it over to my cab.
Before I moved it over to my cab I modified the boot config to:
hdmi_cvt=320 240 60 1
hdmi_group=2
hdmi_mode=87
Everthing works fine, but my image is cut off at the top by a handful of pixels. In game and in retropie(see pic) I tried handful of things but I still cant get a full image. I am using a 25" k7000 with a hdmi to vga to the Pi. Any help would be appreciated.