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The JXD 7800 is a successor to the Archos Gamepad, which the JXD 7800 had 2 models, the 7800, and the 7800B. the "B" version had 16 gibs of space instead of 8.
One of the purposes of the system is emulation, the system comes with Emulators for the Nintendo Entertainment System, Sega Master System, Super Nintendo Entertainment System, Sega Genesis, Turbo-Grafx 16, Commodore 64, Commodore Amiga, Game Boy Advance, Sony PlayStation, Nintendo 64, Sega Dreamcast and PlayStation Portable games.