This program emulates a Sinclair Spectrum 48k Z80-based computer 
on any PC with at least an 80386SX processor and VGA graphics.
  The following Spectrum features are implemented:
- Graphics, nearly perfectly.  The border is implemented, but only 
PJPP emulates flashing and special effects.
- The keyboard, nearly perfectly.
- Kempston joystick, if you have a PC joystick.  Both buttons on 
the PC joystick press the single Kempston button.
- Sound, but only one of the versions with the correct pitch.
- Not the tape interface.