[NES] puNes 0.20/0.21

Mario is Missing

Beauty and the Beast

0.21

• Correct some bugs in the MMC3 (NTSC and PAL) and now
• all the roms that I'have tried works well.

0.20

• Implemented illegal opcode 0x80 for the "Beauty and the Beast (E) [!].nes" rom

0.19

• complete APU emulation.
• This is my first attempt with sdl sound and perhaps there may be some bugs. For now, without the implementation of frameskip, the emulator has to work 100% for not having problems with sound skip and crackle.
• Changed the structure of the code and now the emu takes less than 100Kb.
• Correct many many many bugs.

puNes 0.18:

• added AxROM (mapper 7) emulation.

puNes 0.17:

• fixed another bug and now Incredible Crash Dummies run without problems.

puNes 0.16:

• correct a couple of bugs in the mmc3 emulation.
  

puNes 0.15:

• added MMC3 emulation.

puNes 0.14

• Correct a a bug in the controller routine (thanks Dwedit).

puNes 0.13

• Correct a little bug and now all cpu_interrupts_v2 test roms passed.

puNes 0.12:

• Implemented reading of $2004 during the rendering. (thx to Quietust for the info and for the read2004.nes test rom).
  

puNes 0.11:

• I worked hard on the CPU and PPU emulation and now many  of test roms worked perfectly (thanks blargg).
  
• Added OpenGL support.
  
• Implemented APU Frame Interrupt (only this for now).
  
• Many bugs are gone.