PlayStation Portable emulator PPSSPP turned one this week, and to celebrate the developers released version 0.9.5. This adds post-processing shaders and fixes loads of bugs and emulation issues. Head over to the PPSSPP news page for more details, and download an unofficial Mac binary here (requires SDL).

Open-source virtualisation tool VirtualBox got both a major and a minor update in October. Version 4.3.0 added USB touch device emulation, SCSI CD-ROM emulation, and loads of other things, while 4.3.2 fixed bugs in the virtual machine, GUI, and more. See the changelog for more details.

Sappharad was on the forums recently updating us on the progress of his Mac port of multi-system tool-assisted-speedruns-focused emulator Bizhawk. The latest build is 1.5.2, with recent additions including TI-83 support and loads of bug fixes. There’s still no native user interface, but the main Bizhawk team is refactoring the code to make it easier for someone to do this (if anyone’s up for the task). See the MacScene forum thread here, grab the download here, or check out the Bizhawk Google Code page for more details.

ScummVM celebrated its 12th birthday in style with a super cool visualisation (embedded below) of the history of its codebase. Even if you don’t understand the slightest thing about coding and classes, this will give you a great feel for the scale of the project and the 58,000+ commits made by hundreds of coders. If you’re looking for a more narrative-based history, head over to Ars Technica for my big feature on the project from last year.

Continue reading for more updates, including OS X PPC guest support in QEMU and new versions of RPCEmu, zxsp, CocoaMSX, Mednafen, and more.

Apologies for the break in service. We should be back to roundups every 4-5 weeks from here on out. We could always do with volunteers to help carry the weight, though.

Atari 2600 emulator Stella hit version 3.8 in February, with major changes to the sound system and ZIP archive handling. 3.8.1 followed at the beginning of March, with a few bugfixes and support for TIA RSYNC writes. See the Stella news page for more details. As always, you can get a download link here.

After taking more than nine years to reach its first stable release, ResidualVM has already popped out another one. Version 0.1.1 fixes around 20 bugs in the engine code and a dozen in Grim Fandango’s game data. Get it from the ResidualVM downloads page.

Sega Saturn emulator Yabause got its first update in 14 months near the end of January. Version 0.9.12 (link to announcement post) includes major updates to both the software and OpenGL renderers, adds ISO support to the OS X port, and adds the debug interface to the Qt port. Grab it from the Yabause download page.

Four years to the day after its last release, Sega Master System, Game Gear, SG-1000, ColecoVision, and NES (those last two are newly-added) emulator CrabEmu has been updated to version 0.2.0. You’ll have to download it for the full (and lengthy) changelog, but there’s been extensive work done on the GUI and Master System core.

Continue reading for more emulator updates from the past two months, including new versions of FS-UAE, XRoar, DBGL, VirtualBox (of course), and more.

There’s a new PSP emulator on the scene! From one of the members of the Dolphin team, in collaboration with the fine folks of the Internet, PPSSPP uses a JIT (just in time) compiler to keep its hardware requirements minimal, and it’s looking very promising. At this early stage (0.4 at the last release) it has been confirmed as supporting several games, but nothing at 100% compatibility. It’s being developed on five platforms simultaneously, so expect rapid progress. Check it out. (The Mac version must be built from source.)

The classic and groundbreaking real-time-strategy game Dune II is now playable in your web browser. Based on the game’s open-source implementation OpenDune, Dune 2 Online seems pretty faithful to the original experience. I haven’t encountered any problems yet, but I’m still early on in the campaign.

ZX Spectrum emulator zxsp reached version 0.8.0.pre9 this week. The developer wrote a long-ish post explaining the new features in detail. In short, the emulator now supports audio input from a standard audio input device, and it includes memory inspectors. Get it here (scroll to the bottom).

It was a quiet month in emulation on the Mac, but continue reading for more updates—including progress on the Mini vMac Cocoa port and new versions of QEMU, VICE, and FCEUX.

Boxer, a DOSBox-powered DOS emulator, has been updated to version 1.3. The release notes list taking screenshots and fast-forwarding games among the new features, with heaps of bugfixes and improvements to input handling and gameboxes. Get it from the official Boxer website.

Multi-system emulator Mednafen has been updated to version 0.9.22-WIP, while Jazzin's launcher app NekoLauncher Mednafen received an update (0.9.22 Build 21) to fix a crash bug. Mednafen's new version includes improvements to and L3 and R3 button simulation in the PlayStation emulation, improved Sega Genesis/Mega Drive YM2612 emulation, and broken compatibility with 0.9.21-WIP Genesis/Mega Drive save states. See the NekoLauncher site for more details, and download it at the Mednafen forums.

Amiga emulator FS-UAE has been updated to version 1.2.1, fixing a crash that occurred when saving states with mounted directories. See the FS-UAE website to learn more about this games-focused emulator.

Continue reading for updates to JPCSP, Mini vMac, XRoar, Stella, VirtualBox, and more.

Apple has released the next major update to its Mac operating system. Mac OS X Lion, which is currently available only through the Mac App Store, serves as a great indication of Apple's future direction, and not just because it integrates the most successful aspects of iOS. There are changes afoot in the world of personal computing; Lion may well be both a beginning and an end. Check out John Siracusa's incredible 19-page review on Ars Technica for a complete breakdown

As always with major system upgrades, due caution is advised -- backup your system, research app compatibility, and be prepared for problems. Many older emulators will likely no longer work, as Lion drops PowerPC support altogether. Richard Bannister notes that all current releases of his emulators and other programs are "believed to be compatible," with the sole exception of audio editor Cacophony. Many others, as you'll see, have put out updates to address Lion compatibility.

Keep reading for more emulator updates.