Changes

|version = v1.2 (emulator)<br>v1.2 (converter)3

|developer = Myself086(Lorraine Corville)|prog-lang = 65C816 assembly, C#

'''Project Nested''' is an open-source [[Nintendo Entertainment System emulators|Famicom (NES)]] emulator for the [[Super Nintendo emulators|Super Famicom (SNES)]] written in 65C816 assembly and C#.

Nested The emulator was inspired by the SNES originally being designed to be backwards-compatible with the NES and Myself086 wanting to code a JIT (Just-In-Time) compiler. Work on the emulator began in 2015, when math would be done on its potential performance for three years until one day in 2018, when the design could theoretically run games at full speed. Development started in 2018.

A Emulation works by converting NES ROMs into SNES ROMs using a JIT (Just-In-Time) and AOT (Ahead-of-Time) compiler (available with various options) for Windows) is used to convert NES ROMs into SNES ROMs. This is used to allow software titles for the NES , allowing them to run on SNES hardware.

Save files are created after the software title runs for a while. These can then be added to the ROM, often improving performance, vastly with some titles, and not much with others. The emulator does not use any enhancement chips, but requires the following to run on a flash cartridge or a reproduction cartridgeare required:* Up to 8MB of fast HiROM (additional support for slow HiROM support planned)* 16KB of SRAM (additional support for anywhere else from 0KB up to 256KB of SRAM, depending on the software title and settings, planned)* A battery if required by the software title requires it

The emulator can emulate the NES Emulation occurs at a full up to 60FPS (frames per second), with audio support for audio, but occasional minor slowdown may occur. Software titles that use mappers 0-2 and 4 are playable (however, with mappers 1 and 4 have having minor glitches, which may reduce compatibility levels with titles that use them), with mappers 3, 5-8, 11, 12, 16, 18, 21-26, 32-34, 36-38, 40, 42 and 66 having unplayable support, and mappers 9 and 10 being unlikely to be supported due to it being declared impossible to accurately emulate CHR bank switching, which performed by both mappers perform. Additionally, there is no support for iNES 2.0is not supported. Out of the 456 tested titles, 31 (6.80%) are fully playable, 93 (20.39%) are playable but need a full playthrough to test, 29 (8.73%) are mostly playable, 157 (34.43%) crash in the intro or early in-game, 128 (28.07%) are unplayable and 1 (0.22%) is unlikely to be supported. For example:* Punch-Out!!! is unlikely to be supported due to using mapper 9/MMC2, as it hard to emulate because memory banks can be changed mid-scanline when it draws characters FE or FD, or sprites, the hardest to implement. This is not as problematic with the background, as the window can be used to draw and switch the characters.* One fully playable title, Battle City, was mostly playable from v1.1 until v1.3, when it hung after the game over screen with visual glitches. Others run with minor glitches or require certain options, such as NMI at vblank or stack native return, to be disabled. Overall, at least 50% of games are expected to run in the future. The official compatibility list is available [https://docs.google.com/spreadsheets/d/1xKZIyNz1DSI3ZBdMfaTEaa_9b6IEABx-ZPwOb6XqcLQ/edit#gid=253005073 here].

Out of the 332 tested titles, 11 (3.31%) are fully playable, 37 (11.14%) are playable but need a full playthrough to test, 29 (8.73%) are mostly playable, 95 (28.61%) crash === Future ===The following support is being worked on:* The graphics in the intro or early in-game, and 160 (48.19%) are unplayable. The fully playable titles are Crystalis, Donkey Kong, Donkey Kong Jr., Donkey Kong 3, Super Mario Bros., Millipede, Popeye no Eigo Asobi, Super Mario Bros2 display incorrectly and the American version resets after hitting a Shy Guy., Tennis, The Legend of Zelda latter issue has been reverse engineered and Volleyball (and formerly (as of v1figured out.0Fixing this would also fix many other games that mistakenly reset.2) Battle City, which * Elite is now only mostly playable due being used as a model to hanging after "aggressively" optimize the game over screen with visual glitches)EXE, some of which specifically in AOT compilation, to make emulation run with minor glitches at the same speed, or require NMI mode "At vblank" to be turned off. The official compatibility list is available [https://docs.google.com/spreadsheets/d/1xKZIyNz1DSI3ZBdMfaTEaa_9b6IEABx-ZPwOb6XqcLQ/edit#gid=253005073 here]faster if possible.