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| [[#SNES-CD_revival_and_emulation|SNES-CD]]
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===SNES-CD revival and emulation===
It's pretty well-known that the Super Famicom was going to get a CD '''add-on''' called the SNES-CD, developed by Sony, who had already helped with the sound chip for the SNES. However, Nintendo were unhappy with Sony's clause in the contract that would give them the rights to any software developed on the device. In retaliation, Nintendo announced that they'd be partnering with Phillips instead. Talks between Sony and Nintendo continued afterward as late as 1993, but the project couldn't be salvaged. Nintendo lost interest in the CD peripheral, seeing how the Sega CD failed in the US, and the PC-Engine CD only enjoyed modest success. They canceled the Phillips collaboration on yet another SNES-CD prototype, but in return, they allowed them to use some of their properties for their Phillips CD-i console. Later, they collaborated with the St. Giga radio service to create the Japan-exclusive Satellaview add-on for the Super Famicom, which played broadcasts of SFC games using streamed audio. As for Sony, they took the hardware and experience from their collaboration with Nintendo to create the first PlayStation. Nintendo would continue to support the cartridge format for its next console, the Nintendo 64. A shy attempt at rewritable disk media was attempted with the 64DD, but the add-on failed due to its 64 MB maximum storage limit, which would be obsoleted by later, bigger N64 cartridges, as well as the lack of support from third parties - many of whom had opted to support the PS1 instead.
Some prototype units of the Sony SNES-CD were made. While games were in development for the add-on, some were eventually reworked as regular SNES cartridge games with lots of content gutted (e.g., Nintendo R&D's Marvelous, Square's Secret of Mana, and Romancing Saga 2). Other games, like Hook, were ported to other systems instead (Hook to the Sega CD and Rayman to the Atari Jaguar, among others), while the rest were outright canceled. These games were to have much bigger worlds, streamed music, cutscenes, and even FMVs, according to various interviews. That never happened, however, and most of what was developed for these consoles, including their various manuals and specifications, were lost.
Recently, an actual Sony SNES-CD prototype was uncovered<ref>http://arstechnica.com/gaming/2015/11/the-fabled-snes-playstation-prototype-has-been-turned-on-and-disassembled/</ref> and repaired.<ref>https://www.youtube.com/watch?v=ug-CyGXMabg</ref><ref>https://www.youtube.com/watch?v=qh91IO9cV48</ref> It had various weird hardware restrictions (number of saves, CD size limit, no co-processors), with much of it likely having to do with its unfinished nature. For example, it had planned Audio CD support, though it doesn't actually work, which means the MSU-1 is a much more attractive alternative for hacks aiming to reflect what the SNES-CD could have been.
No$SNS 1.6 supports the Sony SNES-CD add-on. This was made possible after some reverse-engineering and analysis of the leaked BIOS file. Get the leaked Super Disc BIOS, circulating on the net as "SDBR_v0.95.sfc". Under the same directory as the no$sns executable, make a "BIOS" folder, put the BIOS file there, and rename it to "SFX-100.bin".
The only SNES-CD games available online currently are the BIOS for one of the discovered prototypes and two homebrew games. These games, Magic Floor and Super Boss Gaiden (both of which have alternate versions as regular SNES ROMs), come as BIN/CUE files. NO$SNS 1.6 supports only one CD mode, so it only reads the BIN, not the CUE. Both were tested on real hardware and had severe visual glitches due to the SNES-CD adding more undocumented interrupts, which are not accurately emulated anywhere. This means it's safe to say that while SNES-CD emulation exists nowadays, it would have low compatibility with any real unreleased SNES-CD game prototypes.
→Hardware features and accessories
! BizHawk
! Mednafen
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| {{✗}}<ref group=N2>[https://mednafen.github.io/documentation/snes.html Super Game Boy is not supported. If it ever gonna supported in the future, it will likely be via the mednafen's SNES module instead of the GB module].</ref>
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| [[#JRA_PAT_and_NTT_Data_Controller|JRA PAT/NTT modem]]
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| [[#XBAND_Modem|XBⱯND modem]]
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| {{✓}}[https://higan.readthedocs.io/en/stable/guides/import/#satellaview-games *]
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| {{✓}}[[#Data_Pack_emulation|*]]
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| {{✓}}[https://ares-emu.net/compatibility/14 *]
| {{✓}}<ref group=N2>[https://www.snes9x.com/phpBB3/viewtopic.php?t=24376 standalone build guide], [https://old.reddit.com/r/RetroArch/comments/nkgnqb/getting_sufami_turbo_games_to_run_on_android/gzcxdmi/ libretro build guide].</ref>
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===Voice-kun===
A few games by Koei shipped with an Audio-CD that typically contained voice acting and supported the Voice-kun accessory, which would command a CD player with IR signals. Typically used by remote controllers so that audio plays at specific points in the game. These games are still playable in most emulators but without Voice-kun support. byuu intends to make either MSU-1 hacks or proper Voice-kun emulation for these games in future higan versions, which would make it the first emulator to emulate this feature.
===Satellaview emulation===
