generic_15          Generic 15.7 kHz
arcade_15           Arcade 15.7 kHz - standard resolution
pal                 PAL TV - 50 Hz/625
ntsc                NTSC TV - 60 Hz/525
arcade_15ex         Arcade 15.7-16.5 KHz - extended resolution
pc_31_120           PC CRT 31 KHz/120Hz
pc_70_120           PC CRT 70 KHz/120Hz