Sony Prototype TV Game Machine

Historia

The TV Game Machine is an unreleased prototype console developed by Sony during the first generation of video games

Características

The TV Game Machine features a slot for cartridge-based software. There are four buttons on its front face: three numbered 1-3 and labled こたえ (kotae) in red, meaning answer and one labled すすめ (susume) in blue, meaning proceed.
 With no controller, it is thought that these buttons were how games would have been played. On the right-hand side of the machine is a control wheel.
 It is speculated that it could have been used to scroll through text on screen or for inserting and ejecting the game cartridge.