Nintendo DMG-01 - Game Boy Console Manual page 58

2.13.1. I/O Registers
39. FF48 (OBP0)
Name
Contents - Object Palette 0 Data (R/W)
40. FF49 (OBP1)
Name
Contents - Object Palette 1 Data (R/W)
41. FF4A (WY)
Name
Contents - Window Y Position
42. FF4B (WX)
Name
Contents - Window X Position
Page 58
- OBP0
This selects the colors for sprite
palette 0. It works exactly as BGP
($FF47) except each each value of 0 is
transparent.
- OBP1
This Selects the colors for sprite
palette 1. It works exactly as OBP0
($FF48). See BGP for details.
- WY
0 <= WY <= 143
WY must be greater than or equal to 0 and
must be less than or equal to 143 for
window to be visible.
- WX
0 <= WX <= 166
WX must be greater than or equal to 0 and
TM
Game Boy
(R/W)
(R/W)
CPU Manual
V 1.01