This took me over a year to build (though I did take an 8 month break between figuring out all the electronics/software and building the case). Only thing left to do is put a few arcade stickers on it.

It’s running a Raspberry Pi 1 Model B+ with an 8 gig class 10 microSD card.
Other hardware:
HDMI to VGA converter
USB audio card
I-PAC VE keyboard emulator
A scavenged set of desk top speakers with the case removed
17” Computer monitor

The case is made out of ½” plywood and there is a piece of Lexan used to protect and mask the screen.
One interesting thing I did was use some short USB cables to extend 2 of the USB ports and made them accessible from outside of the case. By doing this, I can hook up any USB devise to tweak or edit things, limiting how often I have to open it all up (which isn’t trivial).

This was really designed to run vertical MAME games that have a cocktail version and only use a 4 way joystick and up to 3 buttons. So games like Pac Man, Dig Dug, Donkey Kong etc. I limited it to about 75 games or so. I removed all of the Menu items except, MAME4All, Exit, restart and shutdown.

Controls included 4 ways zippy joysticks, 3 fire buttons per player, coin button, 1 and 2 player buttons.
The way the controls are configured, you launch any menu item with the player 1 button 1. The I-PAC is configured that pressing the 1 and 2 player equals the ESC key allowing you to back out of a game.

I am really happy with how it turned out. Now I just have to resist tweaking the software and messing it all up!