Project Unity is a large, 44-pound system in which the motherboards and ports of 15 consoles have been combined into one monolith of a system, with a single power source and controller (with only SCART video output.. also the consoles are probably PAL, though the author mentions a 50/60 Hz switch when discussing the Sega Genesis).
It implements the NES, SNES, N64, GCN, GBA (compatible with GB/GBC), Playstation 2 (compatible with PS1), Sega Genesis, Master System, Dreamcast, Saturn, Neo Geo MVS, Intellivision, Colecovision, Atari 7800, Turbografx 16, and Amstrad GX4000 (well that's 16, but everyone is saying 15...). Memory cards may be plugged in.
The controller is designed so that it may be used with every system. A cartridge, fashioned out of NES cartridges, is plugged in to provide controller configuration data. This cartridge also implements the memory/rumble packs for the N64/Dreamcast.
http://youtu.be/p9AY_xQre9M
I recommend watching the video, it shows how there was a lot more effort and engineering put into the console than simply stuffing everything into a giant box. He constructed his own 18-pole 16-throw toggle switch for the console-switching alone, along with other things.
It implements the NES, SNES, N64, GCN, GBA (compatible with GB/GBC), Playstation 2 (compatible with PS1), Sega Genesis, Master System, Dreamcast, Saturn, Neo Geo MVS, Intellivision, Colecovision, Atari 7800, Turbografx 16, and Amstrad GX4000 (well that's 16, but everyone is saying 15...). Memory cards may be plugged in.
The controller is designed so that it may be used with every system. A cartridge, fashioned out of NES cartridges, is plugged in to provide controller configuration data. This cartridge also implements the memory/rumble packs for the N64/Dreamcast.
http://youtu.be/p9AY_xQre9M
I recommend watching the video, it shows how there was a lot more effort and engineering put into the console than simply stuffing everything into a giant box. He constructed his own 18-pole 16-throw toggle switch for the console-switching alone, along with other things.