Famicom 3D System
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The Famicom 3D System is an accessory for the FamiCom that was only released in Japan in 1987. The 3D system consisted of a pair of liquid crystal shutter glasses that received video signals through dual 3.5mm jacks on a special adapter. It gave compatible games the illusion of 3D depth. Most games released would play in conventional 2D until a "3D mode" was activated by use of the select button. — from Wikipedia
Output ($4016 write)
7 bit 0
---- ----
xxxx xxFx
|
+--- Obscure or allow light to pass to the left or right eye.
Because the Famicom only generated images at 60Hz, each resultant image will flicker at 30Hz.
