Acorn Archimedes emulator. Requires a RISC OS 2 or 3 ROM image. The default
name expected is /usr/share/arcem/ROM. You can override this with the "--rom"
option.

Some hints:
- Capture/uncapture the mouse pointer by pressing + on the numeric keypad.
- Floppy and hard disc images need to reside in the current directory and have
to be named "FloppyImage" and "HardImage". Note that the
number for the first drive is 0 for floppies and 1 for hard discs.
- Formatting floppy discs from the emulator does not work. You can find an
empty formatted disc image in /usr/share/arcem.
- Hard discs have to be defined in the configuration file ("~/.arcemrc"). An
example can be found in /usr/share/doc/packages/arcemrc.
- Use the parameter "--hostfsdir " to make host directories
accessible from RISC OS. There is a floppy image containing the necessary
RISC OS modules (as well as a tool for formatting hard discs) in
/usr/share/arcem.