Overview
The basic parts of the Twin Famicom include a 60-pin slot for Famicom cartridges, a slot for Disk System's Disk Cards, a switch located right below the cartridge slot which allows the player to choose between "Cassette (カセット?)" or "Disk (ディスク?)", the power button, the reset button, and the eject buttons. FDS disks can be removed using the yellow button below the disk slot. The mechanism that it uses is similar to ones that are used in modern-day floppy disk drives. The eject button for cartridges is located between the power and reset buttons. It usually causes the cartridge to "pop" out of the slot, much like the way bread slices do when coming out of a pop-up toaster.
The system does not allow both slots to be used at the same time. The switch that changes the mode from disk to cartridge works in a manner in which choosing to use the cartridge slot will block the disk drive, and vice versa. However, in some systems, only the cartridge slot will be blocked, but it is impossible to change to cartridge mode while the disk is being read.
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