Today was a day of experimenting with MAME on a Raspberry Pi. Some things I learned:
Emulators do not always default to HDMI output so either a) that needs to be modified in setup or b) you need composite out cables. Adrian was sweet enough to drop by the Radioshack and pick up a composite out for me just in case (and a touchscreen for other projects, yay).
There is a very convenient installer for putting images on the Pi’s sd card – behold!
ROM sites are basically ad sites with some ROMs buried deep within the hive.