Features not implemented:
	-------------------------

. Border;

. High Colour Resolution (also known as cropping);

. loading edge-detector;

. Sound as WAVEFORM;

. Pasting on clipboard;

. saving .TAP and .SLT files;

. trapping of the LOAD and SAVE routines to save blocks as files on disk
 'a la Xtender;

. TAP editor;

. built-in debugger;

. interface I emulation;

. output to printer;

. AMX mouse emulation;

. 128k emulation.