NES Emulators

Specs:

• Processor: 6508 8-bit (using a custom Motorola 6502 class)
• Processor speed: 1.79 Mhz
• Resolution: 256×224 (ntsc) or 256×239 (pal)
• Colors available: 52
• Max Colors on screen: 16, 24 or 25.
• Max sprites: 64
• Max sprites per line: 8
• Sprite size: 8×8 or 8×16
• Picture Scroll: 2 h.v
• RAM: 16 Kbit (2kb)
• Video RAM: 16 Kbit (2kb)
• Min/Max cart size: 192 Kbit – 4 Mbit
• Sound: PSG sound, 5 channels
  2 square wave
  1 triangle wave
  1 noise
  1 PCM

Emulators
Nestopia is one of the best Nintendo/Famicom emulators available, it’s an open source emulator and it gets updated frequently. The Windows port has been completely rewritten from scratch, which means it has been improved, also the emulation core has changed completely.