Nintendo 1504166 Programming Manual - Page 82
Color Special Effects Processing, AGB Programming Manual, Color Special Effects
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AGB Programming Manual Color Special Effects 9.2 Color Special Effects Processing Coefficients for Color Special Effects Address 052h Register BLD ALPHA 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Attributes W Initial Value 0000h Color Special Effects Coefficient EVB Color Special Effects Coefficient EVA Address 054h Register BLDY 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Attributes W Initial Value 0000h Color Special Effects Coefficient EVY Coefficients used in α blending processing are specified in EVA and EVB of the BLDALPHA register. The coefficient used in processing brightness changes is specified in EVY of the BLDY register. The values of EVA, EVB, and EVY are numbers less than 1 and are obtained by multiplying 1/16 by an integer. EVA, EVB, EVY Coeff. EVA, EVB, EVY Coeff. 00000 0 0 1 0 0 0 8/16 0 0 0 0 1 1/16 0 1 0 0 1 9/16 0 0 0 1 0 2/16 0 1 0 1 0 10/16 0 0 0 1 1 3/16 0 1 0 1 1 11/16 0 0 1 0 0 4/16 0 1 1 0 0 12/16 0 0 1 0 1 5/16 0 1 1 0 1 13/16 0 0 1 1 0 6/16 0 1 1 1 0 14/16 0 0 1 1 1 7/16 0 1 1 1 1 15/16 1 X X X X 16/16 ©1999 - 2001 Nintendo of America Inc. 82 D.C.N. AGB-06-0001-002B4