Hi folks today I modded a NeoGeo with the switchless mod.
You can switch between the original bios and the unibios.
And between 50/60Hz all without an extra switch.
It makes use of the original Reset Button.
Look here for details and a video:
http://blog.wolfsoft.de/?p=500 (http://blog.wolfsoft.de/?p=500)
(http://wolfsoft.de/wordpress/wp-content/uploads/2010/04/neogeo_duo_4-300x275.jpg)
(http://wolfsoft.de/wordpress/wp-content/uploads/2010/04/neogeo_duo_5-300x225.jpg)
(http://wolfsoft.de/wordpress/wp-content/uploads/2010/04/neogeo_duo_3-300x300.jpg)