MB86296 Datasheet, PDF (250/352 Pages) Fujitsu Component Limited. – PCI Graphics Controller Specification

FUJITSU LIMITED PRELIMINARY AND CONFIDENTIAL
L5BLD (L5 Blend)
Register
address
DisplayBaseAddress + 198h
Bit number 31 30 29 28 ----- 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Bit field name
Reserved
L5BE L5BS L5BI Reserved
L5BR
R/W
R0
RW RW RW
R0
RW
Initial value
000
This register specifies the blend parameters for the L5 layer.
Bit 7 to 0 L5BR (L5 layer Blend Ratio)
Sets the blend ratio. Basically, the blend ratio is setting value/256.
Bit 14 L5BI (L5 layer Blend Increment)
Selects whether or not 1/256 is added when the blend ratio is not “0”.
0 Blend ratio calculated as is
1 1/256 added when blend ratio≠ 0
Bit 15 L5BS (L5 layer Blend Select)
Selects the blend calculation expression.
0 Upper image × Blend ratio + Lower image × (1 – Blend ratio)
1 Upper image × (1 – Blend ratio) + Lower image × Blend ratio
Bit 16 L5BE (L5 layer Blend Enable)
This bit enables blending.
0 Overlay via transparent color
1 Overlay via blending
Before blending, the blend mode must be specified using L5BE, and alpha must also be enabled
for L5 layer display data. For direct color, alpha is specified using the MSB of data; for indirect
color, alpha is specified using the MSB of palette data.
MB86296S<Coral-PA>
240
Specification Manual Rev0.1