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MB86R02 ‘Jade-D’ Hardware Manual V1.64
MDR2/MDR2S/MDR2TL (Mode Register for Polygon/for Shadow/for TopLeft)
Register
address
DrawBaseA 428
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
TT
LOG
BM
ZW
ZCL
ZC AS SM
R/W
RW
RW
RW
RW
RW
RW RW RW
Initial value
00
0011
0
0
0000
0 0 0
This register sets the polygon drawing mode.
This register is used for the body primitive, for the shade primitive and for the top-left non-
applicable primitive.
The value after a drawing that involves the shade primitive or the top-left non-applicable primitive is
the value set for MDR2.
(Must set SM=AS=TT=0 for MDR2S)
Bit 0
SM (Shading Mode)
Sets shading mode
0
Flat shading
1
Gouraud shading
Bit 1
AS (Alpha Shading mode)
Sets alpha shading mode. This mode is enabled for only 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 mask)
Sets Z write mode
0
Writes Z values
1
Not write Z values
Summary of Contents for MB86R02
Page 24: ...MB86R02 Jade D Hardware Manual V1 64 ...
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 ...
Page 167: ...8 8 MB86R02 Jade D Hardware Manual V1 64 ...
Page 214: ...11 7 MB86R02 Jade D Hardware Manual V1 64 15 16 cycles initial value ...
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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