Color Special Effects Processing - Nintendo 1504166 - Game Boy Advance SP Edition Console Programming Manual

AGB Programming Manual

9.2 Color Special Effects Processing

Coefficients for Color Special Effects
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Address Register
BLD
052h
ALPHA
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Address Register
054h BLDY
Coefficients used in
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
0 0 0
0 0 0
0 0 0
0 0 0
0 0 1
0 0 1
0 0 1
0 0 1
©1999 - 2001 Nintendo of America Inc.
Color Special Effects Coefficient EVB
blending processing are specified in EVA and EVB of the
Coeff.
0 0 0
0 1 1/16
1 0 2/16
1 1 3/16
0 0 4/16
0 1 5/16
1 0 6/16
1 1 7/16
82
Color Special Effects Coefficient EVA
Color Special Effects Coefficient EVY
EVA, EVB, EVY
0 1 0 0
0 1 0 0
0 1 0 1
0 1 0 1
0 1 1 0
0 1 1 0
0 1 1 1
0 1 1 1
1 X X X
Color Special Effects
Attributes Initial Value
W 0000h
Attributes Initial Value
W 0000h
Coeff.
0 8/16
1 9/16
0 10/16
1 11/16
0 12/16
1 13/16
0 14/16
1 15/16
X 16/16
D.C.N. AGB-06-0001-002B4