As this emulator has just been released, TechNES is under constant development. It currently has the following features:

• NES core
  - CPU, PPU and APU fully implemented with great accuracy.
• Mappers
  · Full support for the following iNES mappers:
  0,1,2,3,4,5,6,7,9,10,11,13,15,16,18,19,21,22,23,24,25,26,32,33,34,40,41,42,44,45,46,47,49,50, 51,52,57,58,60,61,62,65,66,67,68,70,71,72,73,75,76,77,78,79,80,82,83,86,87,88,89,91,92,93,
  94,95,97,101,112,113,114,115,117,118,119,133,144,152,155,160,180,182,184,185,188,189,
  225,226,227,228,229,230,231,232,233,234,235,240,241,242,243,244,245,246,248,250
  · Partial support for the following iNES mappers:
  17 (Some games have corrupt graphics)
  85 (VRC7 sound chip not implemented)
  96 (Corrupt graphics)
  222 (Dragon Ninja splits the screen in the wrong place)
  255 (Only a few games may be selected)
• Extra sound chips
  · MMC5
  · FME-7
  - VRC6
  - Namco 106
• Input devices
  · Gamepads 1, 2, 3 and 4
  - Zapper
• Extras
  - Support for zip files
  · Automatic IPS patching
  · Support for custom palette
  · Game Genie
  · Screenshot
  · Save states (with screenshot!)