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MB86R02 ‘Jade-D’ Hardware Manual V1.64
MDR1/MDR1S/MDR1B (Mode Register for LINE/for Shadow/for Border)
Register
address
DrawBaseA 424
H
Bit number
31 30 29 28 27 26 25 24 23 22 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
LW
BP
BL
LOG
BM
ZW
ZCL
ZC AS
R/W
RW
RW RW
RW
RW
RW
RW
RW RW
Initial value
00000
0 0
0011
0
0
0000
0 0
This register sets the mode of line and pixel drawing.
This register is used for the body primitive, for the shade primitive, for the edge primitive.
The value after a drawing that involves the shade primitive, the edge primitive, or the top-left non-
applicable primitive is the value set for MDR1.
Please set ZC bit (bit 2) to 0 when draw BltCopyAltAlphaBlendP command.
Bit 1
AS (Alpha Shading mode)
Sets the shading mode for alpha.
0
Alpha flat shading
1
Alpha Gouraud shading
Bit 2
ZC (Z Compare mode)
Sets Z comparison mode
0
Disabled
1
Enabled
Bit 5 to 3
ZCL (Z Compare Logic)
Selects type of Z comparison
000
NEVER
001
ALWAYS
010
LESS
011
LEQUAL
100
EQUAL
101
GEQUAL
110
GREATER
111
NOTEQUAL
Bit 6
ZW (Z Write mode)
Sets Z write mode
0
Writes Z values.
1
Not write Z values.
Bit 8 to 7
BM (Blend Mode)
Sets blend mode
00
Normal (source copy)
01
Alpha blending
10
Drawing with logic operation
11
Reserved
Summary of Contents for MB86R02
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Page 76: ...3 2 MB86R02 Jade D Hardware Manual V1 64 Figure 3 1 Memory map 1 ...
Page 77: ...3 3 MB86R02 Jade D Hardware Manual V1 64 Figure 3 2 Memory map 2 ...
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Page 497: ...18 139 MB86R02 Jade D Hardware Manual V1 64 VSYNC is output 1 dot clock faster than HSYNC ...
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Page 682: ...22 2 MB86R02 Jade D Hardware Manual V1 00 FUJITSU PROPRIETARY AND CONFIDENTIAL ...
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