New version of the Spectrum emulator for Windows, heres the release info:

DSP Emulator v0.18 (2017/12/31) is released. DSP Emulator is a new version of the ZX SPECTRUM +3, ZX Spectrum 128, ZX Spectrum 48, Arcade, Amstrad CPC 464, NES and Game Boy emulator.

DSP Emulator Changelog:
+Lazarus: Changed then way SDL library initializes the audio, using the newer functions
+Better Open/Save dialogs. Now work the last directory used for each system
+Changed where and when the SDL library is initializated
+Fixed mappers 1, 4, 12, 67 and 68
+Added mappers mmc6, 11 and 147
+Added DIPs switches
-Knuckle Joe
+Added DIPs switches and 2nd player
-Super Basketball
+Added DIPs switches and 2nd player
-Iron Horse
+Updated to version K