JSSpeccy v2 is released. JSSpeccy is a ZX Spectrum emulator in Javascript.

JSSpeccy v2 Changelog:
* Z80 core uses typed arrays[0] where appropriate, for a healthy performance
boost (and significantly less faffing around with '& 0xff' everywhere to get
around the lack of strong typing in Javascript)
* More Javascript-ish architecture - the Z80 instruction set is built up
through copious use of closures, rather than borrowing Fuse's Perl generator
script wholesale. (It's still heavily based on Fuse's Z80 core though.)
* 128K support!
* 99% accurate display emulation, for multicolour effects and the like
* TZX file support (only via tape traps; custom loaders won't work)
* Integration with the World Of Spectrum API, for instant loading of thousands
of software titles



Download: JSSpeccy v2
Play Online: JSSpeccy online (includes 10 classic games!)
Source: Here