Amiga® Hardware Reference Manual: 3 Playfield Hardware

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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 

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