specs

So, the hardcore, final specs of the arcade machine in its current state:

AMD 1.6 Ghz
328MB RAM
20GB HD
GeForce4 128MB Nvidia graphics
CD-RW
802.11g wireless
Sony 21" monitor
Altec speakers and subwoofer
4-usb ports -- all used:
1 for control panel keyboard encoder
1 for trackball
1 for spinner
1 for wireless internet connector

OS, primary software:
Windows XP SP1
GameEx Front End
MAME v. 117