JSPspEmu Git (2014/04/28) is released. JSPspEmu is a PSP emulator made using javascript (actually typescript). It will work with any modern browser. Though the first version work only works with Chrome (desktop and android). At this point it can run some demos.

JSPspEmu Git Changelog:
* - Moved array utils to arrays.ts
- Removed global stuff from modules reducing jspspemu.js size
- Added support for optimizing simple loops (with no conditionals inside), BIG speedup (one order of magnitude) for simple operations like memset or memcpy. For example: compilerPerf@Empty loop 2131ms without this, and 150ms with this. (still lot to work remaining here)
- Improved multu performance
- Small improvements
* - More work
* - Added support for split large modules
- Split ThreadManForUser
- Simplified pspmodules
* - Fixes for master
* - Small fix
* - Fixed stream.readUtf8Stringz, stream.readStringz and stream.readString
- More work on kirk
- Reading PARAMS.PSF and icons, updated page title, background and favicon
- Some more improvements
* - WIP kirk engine and crypted elfs
* - Changed to commonjs
* - Completed moving to AMD
* - WIP AMD refactoring

Try online: JSPspEmu Git (2014/04/28)
Source: Here