It's very rare that someone will use an emulator on a system such as the Commodore Amiga. He we have the ZX Live which is as it says a SpectrumZX emulator for the Commodore Amiga.
Here are the changes made for v0.42:
+ Fixed the IM0/1 Z80 instruction.
+ Fixed the OUTI, OUTD, OTIR and OTDR Z80 instructions.
- Removed a "Load config..." button. The .cfg file is loading automatically when opening GUI.
+ Added "Boot SCL" option and button in GUI. (If .SCL does not contain "boot", that a first "B" file is renamed to "boot").
+ Some optimized GUI data.
Download the emulator here
http://www.zophar.net/amiga-emulators/zxspectrum.html