* VIDC1 sound support on Amiga, RISC OS & Unix/X11
* Emulation of 512kB, 1MB, 2MB, 4MB, 8MB, 12MB, or 16MB of RAM
* Emulation of 'Extension ROMs' as found in the Acorn A4
* ARM3 emulation
* ArcEm clock set from Host's clock, partial RTC support
* Accurate video and timer emulation
* Display upscaling
* Rectangular pixel aspect ratio correction (RISC OS, Windows & X11)
* Significant performance improvements, making ArcEm run better on slow hardware
* When emulating RISC OS:
  - HostFS - A RISC OS file system to allow use of a directory on the Host Filing system as a virtual hard drive
  - Mouse Scroll wheel support
  - Extra video modes, up to 1024x768 in 16 colours and 800x600 in 256 colours