sz81 is a Sinclair ZX80/ZX81 emulator very much based upon the work of Ian Collier’s xz80 and Russell Marks’s z81 but employing the highly portable SDL and including additional functionality and features for desktop computers and portable devices.

Changes:

* Added forced (non-LOAD) program loading via a load file dialog
* Added a save state system for saving and loading sz81 save states
* Moved command-line emulation options to GUI runtime options
* Added support for 1 to 4, 16, 32, 48 and 56K RAM (UDG now works)
* Added the ability to save screenshots via PrtScn (SDLK_PRINT)
* Added support for o, 80, p and 81 program file types
* Added autoloading of ZX80 program files in addition to the ZX81
* Added sequential filenaming for ZX80, printer and screenshot files
* Added a ZX80 BASIC xxxx REM SAVE “progname” filenaming hack
* Added an emulator pause feature via Pause (SDLK_PAUSE)
* Added mouse wheel support, used within the load file dialog
* Added a machine code PipePanic game and a machine code template
* Added the GNU GPL’d Open80 and Open81 source code and ROMs
* Added Win32 support via the _WIN32 preprocessor macro
* Applied several graphical and usability tweaks
* Fixed a couple of bugs

http://dl.openhandhelds.org/cgi-bin/gp2x.cgi?0,0,0,0,72,2830