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Nintendo Super System
Developer	Nintendo
Manufacturer	Nintendo
Type	Arcade, Up to 2 players, Standard cabinet
Generation	Fourth generation
Release date	1991
CPU	Game: See SNES Technical Specs
Display	Main: 25-inch Raster resolution 256 x 240 RGB (Horizontal) 60Hz 52 colors CRT;
Sound	Amplified Stereo or Mono Sound
Controller input	8-way 6-button joystick
Related	Super NES

The Nintendo Super System (NSS) is an arcade system used to preview Super NES games in the United States. It is essentially an arcade version of the Super NES home console hardware with a menu interface, similar to Nintendo's PlayChoice-10 hardware for NES games, that allows players to play select Super NES games for a certain amount of time, depending on how many game credits they had. It featured a large 25-inch display with a resolution of 256 x 240 pixels and loud stereo speakers.^[1] The speakers could also be configured for monaural sound by moving around jumpers on the PCB.^[2] The controller was a modified SNES controller, still featuring an 8-way directional pad and 6 buttons (4 face buttons and 2 triggers), not including the Start and Select buttons.^[3]

Hardware Modifications^[4]

Aside from a few differences, the Nintendo Super System's internal hardware is identical and compatible with that of its home console counterpart, the SNES. However, to either fix problems with the system itself or add more functionality, some modifications can be done to the system's internals.

SD2SNES Compatibility

The PPU (Picture Processing Unit) on the Nintendo Super System directly connects and powers the circuit to reset a game on the Nintendo Super System. On the SNES, there is a resistor in between the two. This causes a problem when using the SD2SNES, a custom cartridge that allows users to play SNES ROMs on actual SNES hardware, among other things. The SD2SNES resets the game in order to load another game or the menu. On the SNES, the SD2SNES can overpower the PPU trying to reset since the PPU has a weaker signal due to the resistor. However, on the Super System, since that resistor is not present, the PPU is able to overpower the SD2SNES, causing compatibility issues. This can be resolved by installing a 2.2k resistor in series between the PPU and the reset circuit to match the SNES.^[4]

Gray Screen and Sound Problems

A design flaw in the Nintendo Super System's motherboard causes voltage drops in the video circuit which results in a washed out or gray screen which can have fluctuating severity depending on the temperature of the system.The sound suffers a similar issue in which sound is either not present or distorted. The problem is in the resistors used for both the video and audio circuits. As power flows through a resistor, the resistor heats up and causes its resistance to increase, thus reducing how much power is let through. Thus, a power surge would cause a resistor to heat up and increase its resistance in order to weaken the surge. This is the problem in the Super System - both the video and audio circuits have power surges that cause the resistance of the circuits to increase too much, thus weakening the signals too much. This problem can be solved by replacing the original 1/8W resistors in the Super System with 1/2W ERJP Anti-Surge resistors.^[4]

SNES Cartridge to Nintendo Super System Cart Adapters

The SNES and Nintendo Super System have different slots for their game mediums, and thus are not natively cross-compatible. However, there have been adapters created that allow SNES cartridges to be used on a Nintendo Super System, so long as the game supports a 60Hz display (which includes most of the SNES library, save for some PAL region games which only support a 50Hz display).^[4]

Nintendo Super System BIOS Revisions^[4]

Version 1

Only one cart is supported. The user must always restart the game in order to add more credits, and starting a game immediately consumes all credits. Restarting the game goes back to the game's main menu instead of a game selection menu.

Version 2

Multiple carts are supported. The user must always restart the game in order to add more credits when multiple carts are installed, and starting a game immediately consumes all credits. Restarting the game goes back to the game's main menu instead of a game selection menu. Skill mode is supported, which allows players to play until they die instead of play until a time limit is reached.

Version 3

Multiple carts are supported. The user must always restart the game in order to add more credits. Only one credit is consumed when a game is started, and more are consumed automatically as time passes. Restarting the game goes back to the game selection screen, forfeiting all the remaining time on the current credit. Skill mode is supported, which allows players to play until they die instead of play until a time limit is reached.

Nintendo Super System games

The Nintendo Super System's games were slightly modified versions of their home console counterparts on the Super Nintendo Entertainment System. Most of them were made more arcade friendly, and all were given a time limit.^[5]

Super Mario World Changes for Nintendo Super System^[6]

There are many changes for Super Mario World to make it more arcade friendly. These changes include, but are not limited to:

No saving, but instead the ability to start at a certain zone on the main menu. Consequently, Switch Palaces have different messages since saving does not exist.
Previously beaten levels can no longer be exited.
Text can be sped up on cutscenes since players have a limited amount of time to play.
Players can no longer trade lives in two-player games.

List of Nintendo Super System Games

References

^ ^a ^b ^c ^d "Nintendo Super System: The Future Takes Shape". Arcade Flyers Archive. Retrieved 2008-04-19.
^ ^a ^b ^c ^d ^e ^f ^g ^h "NIntendo Super System - Videogame by Nintendo". The International Arcade Museum.{{cite web}}: CS1 maint: url-status (link)
^ "File:Nintendo Super System controller.jpg", Wikipedia, retrieved 2019-12-03
^ ^a ^b ^c ^d ^e "DogP's Nintendo Super System page". DogP's Homepage.{{cite web}}: CS1 maint: url-status (link)
^ ^a ^b ^c ^d ^e "Snes Central: Nintendo Super System". Snes Central.{{cite web}}: CS1 maint: url-status (link)
^ "Super Mario World (SNES)/Version Differences". The Cutting Room Floor. 8 September 2019.{{cite web}}: CS1 maint: url-status (link)

Hardware Modifications[4]