Commodore Amiga - Page 317

235
interrupts,
211, 235
selection, 228-9
sensing, 228-9
write, 230
Display
size of, 46
Display field,
29
Display memory, 46
Display modes, 30
Display
output connector, 246
Display window
positioning,
46
SIze
maximum, 72
normal, 47
starting position
horizontal, 47,
70
vertical, 47, 70
stopping position
horizontal, 48,
71
vertical, 48, 72
DIWSTOP, 48, 71
DIWSTRT, 47, 69
DMA
audio, 143,
161
bit-planes, 52
blitter, 186-92
control, 212-3
control register, 212
disk, 230-3
playfield, 52
sprites, 105, 123
DMACON
BLTPRI bit,
191
in audio, 143
in blitter logic operations, 179
in playfields, 52
stopping the Copper,
20 , 212
DMACONR, 212
DSKBLK, 235
DSKBYTR, 232
DSKDAT, 235
DSKLEN, 230
DSKPTH, 230
DSKPTL, 230
DSKSYNC,
235
Dual playfields
bit-plane assignment, 60
description,
58
enabling, 64
high-resolution colors, 63
in high-resolution mode, 63
low-resolution colors, 62
priority, 64
scrolling, 64
Dual-playfield mode, 33
External interrupts, 209
Field time, 29
Genlock
effect on background color,
36
in playfields, 82
High resolution
color selection, 38, 90
memory requirements, 42
with dual playfields,
63
Hold-and-modify mode, 79
Horizontal blanking interval, 12
INTENA, 208
INTENAR, 208
Interlaced mode
Copper in,
22
memory requirements, 42
modulo, 51
setting interlaced mode, 39
Interrupts
audio, 210
blitter,
211
con trol registers, 208-11
Copper, 210
disk,
211, 235
during vertical blanking, 210
external,
209
interrupt enable bit, 209
interrupt lines, 207
maskable, 207
nonmaskable, 207
serial port, 211