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===VS . System===An arcade system based on the NES released for the US. Most emulators It was released in two different cabinet variations: '''Vs. UniSystem''' and '''Vs. DualSystem''', which the later have an option to let you "Insert Coin(s)"double chipsets on the PCB and is capable of running two separate copies of a single program on one boardset.

ROMs Most emulators support VS. System games in their Vs. UniSystem configuation by setting up different DIP switches. But for games in Vs. DualSystem configuation, [[MAME]] is the only choice. Since most VS. System games have palettes differ from the standard RGB NES palette, roms made with VS . System in mind which are accidentally played in the emulator's NES mode (or vice-versa) will cause the colors to be totally garbled. This can occur when there is an issue with the emulator's configuration or the ROM's iNES header.