Image System; Figure 11 - The Dispcnt Register - Nintendo GAME BOY ADVANCE Programming Manual

May 25, 2005
5

Image System

Game Boy Advance can use different image systems depending on the purpose of the software.
These display-related items are changed mainly using the DISPCNT register.
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Address Register
0000h DISPCNT
DISPCNT [d15] OBJ Window Display Flag
Master flag that controls whether the OBJ window is displayed.
For information on the OBJ window, see
DISPCNT [d14][d13] Display Flags for Windows 0 and 1
Master flag that controls whether windows 0 and 1 are displayed.
For information on windows, see
DISPCNT [d12-08] Individual Screens Display Flag
Allows individual control of whether BG0, BG1, BG2, BG3, and OBJ, respectively, are displayed. When
settings are changed during the display period, the screen is hidden immediately if switching from ON
to OFF, but the screen is displayed only after displaying three vertical lines when switching from OFF
to ON.
© 1999-2005 NINTENDO
Figure 11 - The DISPCNT Register
OBJBG3BG2BG1BG0
Individual Screens Display
0: OFF
1: ON
Window 0 Display Flag
Window 1 Display Flag
OBJ Window Display Flag
"6.3 OBJ (Object)" on page 47.
"8 Window Feature" on page 65.
BG Mode
(CGB Mode)
Display Frame Selection
0: Frame buffer 0
1: Frame buffer 1
H-Blank Interval OBJ Processing Flag
0: Enable(OBJ Processing of all H-Line
Intervals)
1: Disable(OBJ Processing of H-Line
Display Intervals Only)
OBJ Character VRAM Mapping Format
0: 2-dimensional
1: 1-dimensional
Forced Blank
0: Disable
1: Enable
Released: May 27, 2005
19
Attributes Initial Value
R/W 0080h
0-5
AGB-06-0001-002-B13