MB86290A Datasheet, PDF (119/184 Pages) Fujitsu Component Limited. – Graphics Controller Hardware Specifications

CUY1 (Cursor-1 Y position)
Register address ^{DisplayBaseAddress + B2h}
Bit #
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Bit field name
Reserved
CUY1
R/W
R0
RW
Default
0
Don’t care
This register controls the vertical position of the cursor-1 pattern top edge.
Set the top edge position of the cursor-0 pattern from the start edge of the
display field in raster units.
BRATIO (Blend Ratio)
Register address ^{DisplayBaseAddress + B4h}
Bit #
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Bit field name BRS
Reserved
BRATIO
Reserved
R/W
RW
R0
RW
R0
Default
0
0
0
0000
This register controls the blending ratio for Console layer pixels when using
the blending mode.
Bits 7-4
BRATIO (Blend Ratio)
Set blending ratio
0000 Coefficient = 0
0001 Coefficient = 1/16
:
:
1111 Coefficient = 15/16
Bit 15
BRS (Blend Ratio Select)
Selects formula for alpha blending
0
(C-layer color x Coefficient) + (Combination color of W/M/B layers x (1 - Coefficient))
1
(C-layer color x (1 - Coefficient)) + (Combination color of W/M/B layers x Coefficient)
BMODE (Blend MODE)
Register address ^{DisplayBaseAddress + B6h}
Bit #
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Bit field name
Reserved
Reserve BLEND
R/W
R0
R0 RW
Default
0
0
0
This register controls the Console layer overlay options. The color set as a
transparent color is irrelevant to the alpha bit and blend processing is not
performed.
Bit 0
BLEND
Overlays mode between C and B/M/W
0
Simple priority mode (C-layer given priority at all times)
1
Blending mode
119