Commodore Amiga A2000 - Figure 3-19 Display Window Horizontal Starting Position; Figure 3-20 Display Window Vertical Starting Position

FULL SCREEN AREA
0 255 361
---------------------------------------------
| | |
| HSTART of DISPLAY | |
| WINDOW occurs in | |
| this region. | |
| | |
---------------------------------------------
Figure 3-19: Display Window Horizontal Starting Position
The eight bits allocated to VSTART are assigned to the first 256 positions counting down
from the top of the display.
FULL SCREEN AREA
--------------------------------------------- 0
| ^ |
| | |
| Vstart of display window |
| occurs in this region |
| __v_|___255
| (NTSC)____________262
| |
---------------------------------------------
Figure 3-20: Display Window Vertical Starting Position
Recall that you select the values for the starting position as if the display were in low-
resolution, non-interlaced mode. Keep in mind, though, that for interlaced mode the
display window should be an even number of lines in height to allow for equal-sized odd
and even fields.
To set the display window starting position, write the value for HSTART into bits 0 through
7 and the value for VSTART into bits 8 through 15 of DIWSTRT.
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