MAME-NES v1.9 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:
Better RAMBO-1 Mapper support
skullxb - Visually pretty good, some artifacts on the far left side near the bottom when on cut scene, weapons, continue and wave selection screens. Got tired of making changes that breaks other games, will be as good as she gets with the documentation available. https://www.nesdev.org/wiki/RAMBO-1
nes nes klax - Visually good
nes nes rthunder - Visually good
nes nes roadrunn - Visually good
nes nes shinobi - Visually good

Download: MAME-NES v1.9
Source: Here