cxNES (Source)
cxNES is an open source, cross-platform NES/Famicom emulator. It is mainly written as a part-time hobby project to suit the needs of its author, but with accuracy, performance and portability as primary goals.
cxNES is written in C and uses SDL 2.0 for graphics, sound and input, and GTK+ for the GUI toolkit. It should have the same functionality and roughly the same look and feel on all supported platforms. Currently only Windows and Linux are supported.
Supported Image/ROM Formats
* iNES/NES 2.0
* UNIF
* Split ROMs (zipped, must be recognized by database)
* FDS
- fwNES (.fds) format, with or without header
- “Raw” format (includes gaps, start marks and checksums)
* NSF
Input Devices/Accessories
* Standard Controllers (NES and SNES)
* Four-player adapters (NES and Famicom types)
* Arkanoid Controllers (NES and Famicom variants)
* Zapper
* Power Pad
* Family Trainer
* Family BASIC Keyboard
* SUBOR Keyboard
* SNES Mouse
* VS. Unisystem support
Supported Expansion Audio Chips
* Nintendo MMC5
* Konami VRC6
* Konami VRC7
* Sunsoft 5B
* Namco 163
* Famicom Disk System
iNES Mapper Support
* 0, 1, 2, 3, 4, 5, 7, 9, 10, 11, 13, 14
* 15, 16, 18, 19, 21, 22, 23, 24, 25, 26, 28, 29
* 30, 31, 32, 33, 34, 36, 37, 38, 39, 41, 44, 46
* 47, 48, 49, 58, 60, 61, 62, 64, 65, 66, 67, 68
* 69, 70, 71, 73, 74, 75, 76, 77, 78, 79, 80, 82
* 85, 86, 87, 88, 89, 90, 91, 93, 94, 95, 97, 99
* 105, 107, 112, 113, 115, 118, 119, 133, 137, 138, 139, 140
* 141, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153
* 154, 155, 158, 159, 166, 167, 178, 180, 182, 184, 185, 189,
* 192, 193, 200, 201, 202, 203, 205, 206, 207, 209, 210, 211,
* 218, 225, 226, 228, 230, 231, 232, 234, 240, 241, 245, 246
Patching
* Supports IPS, UPS and BPS patch formats
* Autopatching support
* Soft-patching
* Patches may be applied via GUI or specified on the command line
* Patches may be included in ZIP files with ROMs or disk images
Video
* Bisquit’s NTSC palette generator
* Blargg’s nes_ntsc filter
* User can specify a 64 or 512 color external palette file to be used instead of the generated palette.
* Enhanced sprite limit workaround: limits sprites for scanlines where the limit appears to be exploited intentionally, otherwise does not limit sprites.
* Supports correct TV aspect ratios for NTSC and PAL consoles
* PNG screenshots
Input
* Flexible input binding support
- Nearly all emulator actions can have custom keyboard and/or joystick mappings
- User-defined ‘modifiers’ useful for button combos on gamepads with few buttons (such as standard NES controllers)
* SDL GameController API
- Allows supported joysticks (including XInput devices) to have a common set of sane default mappings.
- Additional gamepads may be added by editing a plain-text mapping database
- SDL Joystick API also supported for devices not recognized by the GameController API.
* Turbo support for controllers
- Supports dedicated turbo buttons
- Supports toggle buttons to enable/disable turbo on the standard A and B buttons.
Misc
* Savestates
- Can auto-load/save states on ROM load/unload
- Can auto-save state at a user-specified interval
* Dynamic audio resampling
- Uses Blargg’s blip_buf resampler
* Cheat support (Game Genie, Pro Action Rocky, and raw formats)
- Cheats can be auto-loaded/saved on ROM load/unload
* ROM Database (optional) for handling ROMs with incorrect or missing headers.
* Can be compiled or run without the GUI
* Can specify configuration options, patches and cheats on command line
* FDS enhancements
- High-level optimizations of FDS disk I/O routines (optional)
- Automatic disk selection and change for most FDS games (optional)
- Writes to FDS images saved as IPS patches
* Windows builds can be configured to run in portable mode, storing all user data (save files, states, etc.) in the application directory.