ZXMAK2 v2.8.3.37808 Beta is released. ZXMAK2 is plugin based ZX Spectrum Virtual Machine. On the other side, this is flexible ZX Spectrum emulator. Project written in C#. Currently it works on Windows platform and using Managed DirectX.

Support the following ZX Spectrum clones:
- ZX Spectrum 48 (later model contended memory)
- ZX Spectrum 128 (later model contended memory)
- Pentagon 128
- SCORPION 256
- ATM 450
- PROFI 5xx
- QUORUM 256
- Leningrad 1
- Other (through custom configuration and plugins, for example LEC mod)

ZXMAK2 v2.8.3.37808 Beta Changelog:
- fix thread synchronization issue;
- add realtime graph;
- fix fps calculation (now it updated each 1 second);
- fix fps background fill (background did not apprears on some videocards);
- fix XNA4 synchronization;
- fix Z80 reset and initial state (USR 46578 issue);
- fix PENTEVO AY8910-IRB issue (freeze on select 48K);
- fix HDD readOnly emulation (now it works like hard disk is writable, but any write will be ignored);
- fix Linux compatibility issues;
- add CtrlC/CtrlBreak handlers for the console log appender;
- disable close button for the console log appender (also console appender is disabled by default in log4net.config);
- enormous code refactoring, now UI part is completely separate from engine;

Download: ZXMAK2 v2.8.3.37808 Beta
Source: Here