SEGA SATURN DEVELOPER'S MANUAL

Table 12.3 Special color operation modes

Specify for each TD using color data with color operation enable bit = 1
and
most significant bit = 1

Special Color Calculation Mode	Special Color Calculation Specification	Color format	Color calculation enable condition
Mode 0	Specify for each screen	Pallet format or RGB format	Color operation enable bit = 1
Mode 1	Palette format or RGB format	Color operation enable bit = 1 and Special color calculation bit in pattern name data = 1
Mode 2	Specify for each dot	Palette format	Color operation enable bit = 1 and Special color calculation bit in pattern name data = 1 and Dot that matches the dot color code specified in the special function code
Mode 2	Specify for each dot	RGB format	Setting prohibited
Mode 3	Specify in the most significant bit of color data	Palette format	dot
Mode 3	Specify in the most significant bit of color data	RGB format	Color operation enable bit = 1

Special color calculation mode can be specified only for the top image. Special color calculation modes other than the top image are fixed to mode 0.