nesdev.org

Due to performance reasons, I rewrote the whole emulator from CoffeScript to JavaScript (ES6).
There should be noticable performance improvement in Firefox (emulation speed should be as fast as in Chrome).

Another update:
- fixed PPU scrolling implementation (games like Slalom or F-1 Race are now properly rendered)
- fixed VBlank/NMI timing (emulator passes ppu_vbl_nmi test)
- popping sounds should be now reduced (the cause was audio buffer overflow)

Minor update:
- all CPU opcodes are implemented (emulator passes Blargg's instr_test and instr_timing tests)
- better PPU timing - the first level of Battletoads is now playable (the game freezes in the second level, though)

-Driar (homebrew game) doesn't work probably due to lack of support for undocumented CPU opcodes Driar (both original SGROM and my NROM) use $8F (SAX), $B3 (LAX), and $CB (AXS). The NROM build additionally requires that RAM exist from $800-$895 (although it doesn't require that RAM be mirrored) I'v...

-Driar (homebrew game) doesn't work probably due to lack of support for undocumented CPU opcodes I implemented some of them, but not all. -Slalom has lines that are displaced suggesting that you're using a PPU design that draws a whole line at a time. Sadly there's no way to deal with all the raste...

Hi, CFxNES is emulator I've been working on for some time. It's written in JavaScript (ES6).

For more info see project page or changelog.
Live demo is running at http://cfxnes.herokuapp.com

Any comments are welcome. Thanks.