The screen display of the Amiga consists of two basic parts -- playfields,
which are sometimes called backgrounds, and sprites, which are easily
movable graphics objects. This chapter describes how to directly access
hardware registers to form playfields.  The chapter begins with a brief
overview of playfield features and covers the following major topics:

   *  Forming a single "basic" playfield, which is a playfield the same
      size as the display screen.  This section includes concepts that are
      fundamental to forming any playfield.
   *  Forming a dual-playfield display in which one playfield is
      superimposed upon another.  This procedure differs from that of
      forming a basic playfield in some details.
   *  Forming playfields of various sizes and displaying only part of a
      larger playfield.
   *  Moving playfields by scrolling them vertically and horizontally.
   *  Advanced topics to help you use playfields in special situations.

For information about  movable sprite objects , see Chapter 4, Sprite
Hardware.  There are also movable playfield objects, which are subsections
of a playfield.  To move portions of a playfield, you use a technique
called  playfield animation , which is described in Chapter 6, Blitter
Hardware.

For information relating to the playfield hardware in the Enhanced Chip
Set (ECS), such as  SuperHires Mode ,  programmable scan rates  and
 synchronization , see Appendix C.

 About Amiga Playfields 
 Forming a Basic Playfield 
 Forming a Dual-playfield Display 
 Bitplanes and Display Windows of All Sizes 
 Moving (Scrolling) Playfields 
 Advanced Topics 
 Summary of Playfield Registers 
 Summary of Color Selection Registers