ZXMAK2 v2.7.6.2 Test 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 v2.7.6.2 Test Changelog:
- DasmTool/TimingTool code refactoring
- IHostSound code refactoring; enging frame sync code refactoring (WaitFrame/PushFrame)
- fix emulation thread synchronization (press start/stop quickly)
- IHostVideo code refactoring (WaitFrame/PushFrame)
- add VBlank synchronization (thread blocking, because I didn't found alternative in Direct3D to utilize event.Wait)
- added selection for frame synchronization source (Video/Sound/None)
- added autocalculation for frame skip (depends on display frame rate)

Download: ZXMAK2 v2.7.6.2 Test
Source: Here