Nintendulator 0.975 beta (2010/07/05) 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: July 5, 2010 While in prior versions of Nintendulator, PPU debug information (pattern table, nametable, and palette views) was only updated once per frame, the improved debugger (introduced June 29, 2008) had been made to update such information immediately, resulting in considerable slowdowns; today's build restores the original behavior, as well as incorporating various other bits of code cleanup.

Download:Nintendulator 0.975 beta (2010/07/05)
Source:Here