Commodore Amiga - Figure 3-25 Memory Picture Larger than the Display Window; Figure 3-26 Data for Line 1 - Horizontal Scrolling; Figure 3-27 Data for Line 2 - Horizontal Scrolling

START
START+38
START+78
DISPLAY
WINDOW
Width
Memory Picture Width
~
Figure 3-25: Memory Picture Larger Than the Display Window
Data for Line 1:
Location:
START
Leftmost
Display Word'
START+2
Next Word
START+4
Next Word
Figure 3-26: Data for Line 1 - Horizontal Scrolling
START+40
Last Display
Word
At this point, the bit-plane pointers contain the value START+42. Adding the modulo
of
38 gives the correct starting point for the. next line.
Data for Line 2:
Location:
START+80
Leftmost
Display Word
START+82
Next Word
START+84
Next Word
Figure 3-27: Data. for Line 2-Horizontal Scrolling
START+120
Last Display
Word
In the BPLxMOD registers you set the modulo for each bit-plane used.
Playfield Hardware
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