MAME-NES v1.6 is released. This branch contains a major NES/Famicom accuracy update for MAME. The main M6502/NES CPU timing path, APU, and PPU have been heavily reworked toward cycle-accurate behavior. The goal of this work is to improve hardware accuracy while keeping the implementation compatible with MAME's existing NES/Famicom architecture.

MAME-NES Changelog:
Few Mapper Updates:
MMC3 (IRQ timing and Wario's Woods now has the correct blinking in the bottom right of screen)
Namcot (IRQ timing)
TenGen (IRQ timing)
Sunsoft (IRQ timing)
Some PPU Updates:
Scanline 0 Sprites is correct now
PacMan TenGen now has the correct blinking dots in the upper left and right corners
SteinsGate Dust Pixel is implemented correctly
StarTropics Sprite's over the hearts when jumping into new screens with vertical scroll is correctly implemented now
RadRacer shows the correct rectangle to the right of the track now, after Hybrid Addressing fixed. (confirmed with 100th_Coin)

Download: MAME-NES v1.6
Source: Here