Pallet number bit (for bitmap) : Bit map palette number bit
(N0BMP6 to N0BMP4, N1BMP6 to N1BMP4, R0BMP6 to R0BMP4)
∙ Specify the upper 3 bits of the palette number when displaying the scroll screen in bitmap format.
N0BMP6 to N0BMP4
18002CH
bits 2 to 0
For NBG0
N1BMP6 to N1BMP4
18002CH
bits 10 to 8
For NBG1
R0BMP6 to R0BMP4
18002EH
bits 2 to 0
For RBG0
When the number of bitmap colors is 16, add 0 to the lower 4 bits and use it as a 7-bit palette number.