Character Ram - Nintendo GAME BOY Programming Manual

Game Boy Programming Manual

1.3 Character RAM

!
Character data can be written to the 6144 bytes from 8000h to 97FFh.
!
The area from 8000h to 8FFFh is allocated for OBJ character data storage.
!
The register LCDC can be used to select either 8000h-8FFFh or 8800h-97FFh as
the area for storing BG and window character data.
!
If the BG character data are allocated to 8000h-8FFFh, these data share an area
with OBJ data, and the character dot data that correspond to the CHR codes also
are the same.
!
By means of bank switching, CGB can store twice the amount of character data in
LCD display RAM that DMG can store. In this case, both Bank 1 and Bank 0 have
the same mapping as the area in DMG.
50