MB86294 Datasheet, PDF (220/305 Pages) Fujitsu Component Limited. – Grraphiics Controller specifications

FUJITSU LIMITED
PRELIMINARY and CONFIDENTIAL
MDR1/MDR1S/MDR1B (Mode Register for LINE/for Shadow/for Border)
Register
address
DrawBaseAddress + 424H
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
R/W
RW
RW RW
RW
RW RW RW RW
Initial value
00000
00
0011
0 0 0000 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 is the value set for
MDR1.
The ZC bit of MDR1 is also used for point drawing. But in case of DrawPixelZ command, this bit
automatically set to 1.
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
MB86294/294S CORAL_LB
Graphics Controller
220
Specifications Rev. 1.0