Nintendulator 0.975 beta (2010/01/04) is released. Nintendulator is an open source Win32 NES emulator written in C (plus some assembly optimization). The original goal was to emulate the NES down to its hardware quirks; though it's fallen behind over the years, recent builds have caught up once again and can emulate certain behaviors most other emulators neglect to handle. However, this emulation precision comes at a price - a 1500MHz (estimated) or faster CPU is required to emulate at full speed.

Supported file formats include .NES, UNIF, FDS (fwNES format), and NSF. Mappers are handled using external DLLs, complete with extra sound channels for most games which provide them. Other notable features include writing to FDS images (by storing the differences in the SRAM folder), Game Genie support (limited to 3 codes), customizeable controllers (including 4 player), input movie recording and playback (with re-recording), AVI capturing, and a debugger.

The developer said:

January 2, 2010

With rather inconvenient timing, information regarding the inner workings of MMC5 PCM sound were posted yesterday, 1 day after the release of Nintendulator 0.700. Support for this feature (though it is not known to be used by any games) has been added.

Additionally, limited support for NES 2.0 format ROM images has finally been added - for now, this consists solely of handling images with more than 4MB of PRG ROM and 2MB or more CHR ROM.

Download:Nintendulator 0.975 beta (2010/01/04)
Source:Here