Nintendo GAME BOY Programming Manual page 135

2) Uniform processing for CGB and DMG/MGB/MGL
Note: The BG attributes should always be transferred before the BG
character code.
Even if only the BG attributes are changed, always transfer the
character code from that same address.
CGB support code (80h)
written to ROM data area
(address 143h)
Start
Initialization
Color Palette Transfer
(rewrite)
OAM Transfer
BG Attribute Transfer
BG CHR Code Transfer
LCDC ON
Color display in CGB
Monochrome display in
DMG/MGB/MGL
LCDC OFF
or blanking
135
Chapter 5: Miscellaneous General Information
Supplemental processing for
CGB support
(LCD Display RAM Bank 1)
(LCD Display RAM Bank 0)