Commodore Amiga A1000, Hardware Reference Manual

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AMIGA HARDWARE REFERENCE MANUAL
TABLE OF CONTENTS
Chapter 1 INTRODUCTION
Components of the Amiga ..................................2
THE MC68000 AND THE AMIGA CUSTOM CHIPS.................2
VCR AND DIRECT CAMERA INTERFACE........................5
PERIPHERALS............................................5
SYSTEM EXPANDABILITY AND ADAPTABILITY..................6
About the Examples........................................7
Some Caveats to Hardware Level Programmers ...............9
Chapter 2 COPROCESSOR HARDWARE ............................13
Introduction.............................................13
ABOUT THIS CHAPTER....................................14
What is a Copper Instruction? ...........................14
The MOVE Instruction ....................................15
The WAIT Instruction.....................................17
HORIZONTAL BEAM POSITION..............................18
VERTICAL BEAM POSITION ...............................18
THE COMPARISON ENABLE BITS............................19
Using the Copper Registers...............................20
LOCATION REGISTERS ...................................20
JUMP STROBE ADDRESS...................................21
CONTROL REGISTER......................................21
Putting Together a Copper Instruction List ..............22
COMPLETE SAMPLE COPPER LIST...........................24
LOOPS AND BRANCHES ...................................25
Starting and Stopping the Copper ........................25
STARTING THE COPPER AFTER RESET.......................25
STOPPING THE COPPER...................................26
Advanced Topics..........................................27
THE SKIP INSTRUCTION..................................27
COPPER LOOPS AND BRANCHES AND COMPARISON ENABLE.......28
USING THE COPPER IN INTERLACED MODE ..................30
USING THE COPPER WITH THE BLITTER.....................31
THE COPPER AND THE 68000..............................31
Summary of Copper Instructions ..........................32
Chapter 3 PLAYIELD HARDWARE................................33
Introduction.............................................33
ABOUT THIS CHAPTER....................................34
PLAYFIELD FEATURES ...................................34
Forming a Basic Playfield ...............................38
HEIGHT AND WIDTH OF THE PLAYFIELD.....................39
BIT-PLANES AND COLOR .................................39
SELECTING HORIZONTAL AND VERTICAL RESOLUTION .........43
ALLOCATING MEMORY FOR BIT-PLANES .....................46
CODING THE BIT-PLANES FOR CORRECT COLORING ...........49
DEFINING THE SIZE OF THE DISPLAY WINDOW ..............50
TELLING THE SYSTEM HOW TO FETCH AND DISPLAY DATA .....53
DISPLAYING AND REDISPLAYING THE PLAYFIELD ............56
ENABLING THE COLOR DISPLAY ...........................56
BASIC PLAYFIELD SUMMARY ..............................57
EXAMPLES OF FORMING BASIC PLAYFIELDS .................59
Forming a Dual-playfield Display ........................62