Commodore Amiga A2000 - 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 START+2 START+4... START+40
Leftmost Next Word Next Word Last Display
display word word
Figure 3-26: Data for Line 1 - Horizontal Scrolling
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 START+82 START+84 START+120
Leftmost Next Word Next Word Last Display
Display Word word
Figure 3-27: Data for Line 2 Horizontal Scrolling
In the BPLxMOD registers you set the modulo for each bit-plane used.
- Playfield Hardware 79 -