Changes

The project began Development of Project Nested started as improving a private SNES emulator on PC to recompile code instead , of interpretingwhich its interpreter was replaced with a recompiler. The emulator was already running It ran at full speed, and development was going "pretty well", but was not considered challengingdue to little challenge, so it was decided a project to do emulate the NES on the SNESwas started. After Official development began in summer 2018 after three years of casual design and thinking about how coming up with a solution to achieve 100% full performance (otherwise it would have been considered pointless) until summer 2018, the emulator began official development.

As of v1.3, the model has been improved since, but not by muchreceived minor improvements. The speed was calculated by multiplying the average amount of times each instruction executed each per frame and the overhead. However, the maths were 5 percent off on their first implementation. Most implementations were made It was mostly implemented after approximately about one month.

The emulator was inspired by the SNES originally being designed to be backwards-compatible for backward compatibility with the NES and Myself086 wanting a desire to code a JIT (Just-In-Time) compiler.

Emulation works by converting NES ROMs into are converted to SNES ROMs using a JIT (Just-In-Time) and AOT (Ahead-of-Time) compiler (with various options) for Windows, 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 titlesvarying from little to much, and not much with othersdepending on the title.

* 8KB to 256KB of SRAM (at least 16KB is required + to create feedback for the exeEXE)* A battery if required by the software titlerequires it

* [https://docs.google.com/spreadsheets/d/1xKZIyNz1DSI3ZBdMfaTEaa_9b6IEABx-ZPwOb6XqcLQ/edit?usp=sharing Compatibility List] Emulation occurs at up to 60FPS (frames per second) with audio support, but occasional minor slowdown may occur. Software titles that use using mappers 0-4 and 7 are playable, with mappers 1 and 4 having minor glitches, which may reduce compatibility levels with titles that use them, mappers 5, 6, 8, 11, 12, 16, 18, 21-26, 32-34, 36-38, 40, 42 and 66 having potential for future compatibility, mappers 9 and 10 unlikely to be supported due to it being declared impossible to accurately emulate CHR bank switching, and 14 and 17 due to being "copier mappers", and the rest, up to 255, being unknown. Additionally, iNES 2.0 is not supported.

* Punch-Out!!! is unlikely to be supported due to using mapper 9/MMC2, due to difficulties in implementing mid-scanline memory bank changes when drawing characters FE or FD, or sprites, the hardest harder to implementsprites. This The background is not as problematic with the backgroundeasier to implement, however, as the window can be used to draw and switch the characters.* The graphics in Super Mario Bros. 2 displayed incorrectly and the American version reset after hitting a Shy Guy until v1.4. Some time before the [https://www.youtube.com/watch?v=TthFh27Mx5k Sharopolis interview] on July 10, 2021, the latter issue was reverse engineered and figured out, also fixing many other games that mistakenly reset.

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].

 ==External links==* [https://docs.google.com/spreadsheets/d/1xKZIyNz1DSI3ZBdMfaTEaa_9b6IEABx-ZPwOb6XqcLQ/edit?usp=sharing Compatibility list]* [https://www.youtube.com/watch?v=zUSTG--CkSA&t=1s Project Nested -- Play NES games on the SNES!Sharopolis demonstration + interview]