Commodore Amiga Hardware Reference Manual page 11

Chapter 7 SYSTEM CONTROL HARDWARE ............................................... 197
Introduction .............................................................................................................................
197
Video Priorities .....................................................................................................................
198
FIXED SPRITE PRIORITIES .................................................................................... 198
HOW SPRITES ARE GROUPED ............................................................................ 199
UNDERSTANDING VIDEO PRIORITIES .......................................................... , 199
SETTING THE PRIORITY CONTROL REGISTER ...................................... 200
Collision Detection .............................................................................................................
202
HOW COLLISIONS ARE DETERMINED ........................................................... 202
HOW TO INTERPRET THE COLLISION DATA ........................................... 202
HOW COLLISION DETECTION IS CONTROLLED ..................................... 203
Beam Position Detection ...............................................................................................
205
USING THE BEAM POSITION COUNTER ...................................................... 205
Interrupts ..................................................................................................................................
207
NONMASI<ABLE INTERRUPT ............................................................................... 207
MASKABLE INTERRUPTS ....................................................................................... 207
USER INTERFACE TO THE INTERRUPT SYSTEM .................................. 207
INTERRUPT CONTROL REGISTERS ................................................................ 208
SETTING AND CLEARING BITS .......................................................................... 208
DMA Control .........................................................................................................................
212
Chapter 8 INTERFACE HARDWARE .................................................................... 215
Introduction .............................................................................................................................
215
Controller Port Interface ..............................................................................................
216
READING THE CONTROLLER PORT ............................................................... 217
Disk Controller .....................................................................................................................
227
DISK SELECTION, CONTROL, AND SENSING ............................................ 228
OTHER REGISTERS IN DISK OPERATIONS ............................... :................. 232
DISI( INTERRUPTS ...................................................................................................... 235
The I(eyboard ........................................................................................................................
236
HOW THE KEYBOARD DATA IS RECEIVED ................................................ 236
TYPE OF DATA RECEIVED .................................................................................... 236
LIMITATIONS OF THE KEYBOARD .................................................................. 239
Parallel Input/Output Interface .............................................................................
240
Serial Interface ......................................................................................................................
240
INTRODUCTION TO SERIAL CIRCUITRy..................................................... 240
SETTING THE BAUD RATE .................................................................................... 240
SETTING THE RECEIVE MODE ........................................................................... 241
CONTENTS OF THE RECEIVE DATA REGISTER ..................................... 241
HOW OUTPUT DATA IS TRANSMITTED ....................................................... 243
SPECIFYING THE REGISTER CONTENTS .................................................... 244
Audio Output Connections .........................................................................................
245
Display Output Connections ......................................................................................
245
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