ZXMAK2 v2.8.0.37486 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 v2.8.0.37486 Test Changelog:
Code changelog:
- Upgrade to .NET 4.0 (please make sure that you already installed it)
- Enable nuGet extension
- Upgrade logger to log4net
- Upgrade resolver to Unity Application Block
- fix IHostSound.PushFrame with null
- use IoC (draft version)
- a lot of refactoring, but it's still in progress :)

Emulation changelog:
- add new scaling mode - SquarePixelSize;
- add Mimic TV video filter;
- precise monitoring of rendering FPS;
- add monitoring of update FPS;
- high priority for vblank wait (for smoothest video)
- fix tape traps (tapetest.tap)
- add support of ATM 4.50 extended 128K ROM emulation
- fix for ATM turbo params settings (renderer crash issue)
- add XNA4 View (sorry, currently available through unity.config only)
- add keyboard mapping file (sorry, config file currently embedded into DLL);

- a lot of changes in Adler's debugger (IL emitted conditional breakpoints, etc)

Download: ZXMAK2 v2.8.0.37486 Test
Source: Here