HalfNES v0.050 is released. HalfNES is an open-source emulator for the Nintendo Entertainment System, written in Java. Currently, it only runs as a standalone Java SE application.

Current Features:
- Joystick support through both Direct Input and xInput (thanks Zlika)
- Supports Mapper 0, 1, 2, 3, 4, 5, 7, 9, 10, 11, 19, 21, 22, 23, 24, 25, 26,
- 34, 38, 64, 66, 68, 69, 70, 71, 78, 87, 89, 93, 94, 97, 107, 118, 119, 140, 152,
- 0, 185, 200, 203, 226, 240, 246
- SRAM save support (no save states however)
- Accurate sound core
- Fast video code with NTSC filter (filter is still slow)
- Full screen support
- Cross-platform portable
- Added options dialog for easier remapping of keys

HalfNES v0.050 Changelog:

Lots of minor improvements for this release, and new mapper support as well. Thanks to Nawrot Kryzystof for many of these fixes. Added Mappers: Mapper 10 (Fire Emblem, Famicom Wars) Mapper 19 (Megami Tensei II, Rolling Thunder (J), etc.) with expansion sound Mapper 34 (Impossible Mission II) Mapper 38 (Crime Busters) Mapper 64 (Klax, Rolling Thunder (U)) Mapper 70 (Kamen Rider Club) Mapper 89 (Mito Koumon) Mapper 93 (Fantasy Zone (J)) Mapper 94 (Senjou no Oukami) Mapper 97 (Kaiketsu Yanchamaru) Mapper 107 (Magic Dragon) Mapper 140 (Bio Senshi Dan) Mapper 152 (Arkanoid 2) Mapper 180 (Crazy Climber) Mapper 185 (Spy Vs Spy (J) but NOT Banana) Mapper 200 (36-in-1 Multicart) Mapper 203 (35-in-1 Multicart) Mapper 240, 246 (More Chinese original games) Fixed: -Fixed DMC timing (passes DMC basics test and makes Bee 52 work better) -CPU interrupt is delayed so CLI+SEI only causes 1 interrupt after SEI (fixes Break Time, Hebereke) -Fixed APU frame counter reset to within 1 CPU opcode of correct timing -Fixed APU sweep behavior when clocked then immediately reset (Super Mario Bros. sound effects, Driar wrong notes in music) -Updated VRC7 sound to use new patch set from nesdev, changed the way modulator feedback works, increased envelope attack rate -Added CRC to options menu to make verifying dumps easier -Fixed Uchuusen - Cosmo Carrier mirroring -Fixed bug with file dialog where it wasn't clearing the old name when loading a ROM by double clicking Broke: - Lagrange Point intro was broken by the CPU interrupt change. Game is still playable.

Download: HalfNES v0.050
Source: Here