Nintendo 1504166 - Game Boy Advance SP Edition Console Programming Manual page 66

AGB Programming Manual
Individual Control of OBJ display
It is possible to control the ON and OFF functions of the OBJ display individually by setting
in the combination of the double size flag for [d09] and this rotation/scaling flag.
In case of (double size flag, rotation/scaling flag) = (1, 0), OBJ is not displayed, but is
displayed in other cases.
[d07-00] Y-Coordinate
Allows the y-coordinate of the OBJ in the display screen to be specified.
[Cautions]
160 dots in total (0 - 159) are inside the display screen, and 96 dots in total (160-
255) are outside the display screen (virtual screen).
When the vertical size displays a 64 dot OBJ by a double size of character, the
size is 128 dots, exceeding the vertical 96 dots for the virtual screen.
Therefore, in the range of Y coordinate values of 129 - 159, the lower part of OBJ
that is pushed out upwards is displayed. The upper part of OBJ in the lower
screen is not displayed (see below).
OBJ Attribute 1
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
©1999 - 2001 Nintendo of America Inc.
Rotation/scaling parameter selection
0-31
Horizontal flip flag
Vertical flip flag
OBJ Size
x-coordinate
66
Rendering Functions
D.C.N. AGB-06-0001-002B4