SEGA SATURN DEVELOPER'S MANUAL

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Some screens cannot be displayed depending on the reduction setting. Table 5.2 shows the restrictions.

Table 5.2 Restriction of display screen by setting reduction enable bit

Screen Number of character colors (bit
map pattern colors) Reduce enable setting Screen that cannot be displayed
NBG0 16 colors Up to 1/2 None
Up to 1/4 possible NBG2
256 colors Up to 1/2 possible NBG2
NBG1 16 colors Up to 1/2 possible None
Up to 1/4 possible NBG3
256 colors Up to 1/2 possible NBG3

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Screen	Number of character colors (bit map pattern colors)	Reduce enable setting	Screen that cannot be displayed
NBG0	16 colors	Up to 1/2	None
	16 colors	Up to 1/4 possible	NBG2
	256 colors	Up to 1/2 possible	NBG2
NBG1	16 colors	Up to 1/2 possible	None
	16 colors	Up to 1/4 possible	NBG3
	256 colors	Up to 1/2 possible	NBG3