Nintendo 1504166 Programming Manual - Page 40
VRAM Address Mapping of BG Data, screen base block specification of the BG control register.
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AGB Programming Manual Rendering Functions 6.1.3 VRAM Address Mapping of BG Data BG data (BG character and screen data) are stored in the 64-Kbyte BG area of VRAM. 1) BG Character Data The starting address for referencing BG character data can be specified using the character base block specification of the BG control register. The amount of data depends on the number of character data items stored and the data format (color formats: 256 colors x 1 palette or 16 colors x 16 palettes). 2) BG Screening Data The starting address for referencing BG screen data can be set using the screen base block specification of the BG control register. The amount of data depends on the type of BG screen (text or rotation/scaling) and the screen size. These can be set by the BG control register. ©1999 - 2001 Nintendo of America Inc. 40 D.C.N. AGB-06-0001-002B4