* PPU color emphasis and monochrome mode.
* Joypad data logging, known as "movies" for replay purposes.
* Savestates.
* NESticle savestate loading (.STA files).
* Trainer data.
* GUI and config file.
* PRG data patching.
* Sound recording in WAV format.
* FUll PRG data disassembler.
* Pseudo stereo sound.
* Various image blitters.