> All of the ROMs for some shitty, hacked-up old version of MAME, sure.
The Raspberry Pi 3 I have is running Mame2010(v0.139).(I switched the Rpi 2 for a 3 in April) It can play everything from 1975-1995 at full speed with the exception of 3D arcade games such as PSX and Saturn(SH-2) based hardware. It also can't handle Cave SH-3 games. But most 2D games including Capcom System III run fine on it. It can also run all PS1 ISOs at full speed.