Geometry Mode Registers - Fujitsu MB86R02 Jade-D Hardware Manual

MB86R02 'Jade-D' Hardware Manual V1.64
18.11.15

Geometry mode registers

The SetRegister command is used to write values to geometry mode registers. The geometry mode
registers cannot be accessed from the CPU.
GMDR0 (Geometry Mode Register for Vertex)
Register
GeometryBaseAddress + 40
address
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
R/W
Initial value
This register sets the types of parameters input as vertex data and the type of projective
transformation.
Bit28 FX (Float Setup eXpand)
Enable Float Setup mode (See Geometry command code table)
Work Only for G_Begin/Triangle(s,_Strip,_Fan)
0 disable
1 enable
Bit 7 CF (Color Format)
Specifies color data format
0 Independent RGB format/Packed RGB format
1 Reserved
Bit 6 and 5 DF (Data Format)
Specifies vertex coordinates data format
00 Specifies floating-point format (Only independent RGB format can be used as color
data format.)
01 Specifies fixed-point format (Only packed RGB format can be used as color data
format.)
10 Reserved
11 Specifies packed integer format (Only packed RGB format can be used as color
data format.)
CF
0
1
18-238
H
FX
W
0
DF Input data format
00 Floating-point format + independent RGB format
01 Fixed-point format + packed RGB format
10 Reserved
11 Packed integer format + packed RGB format
00 Reserved
01 Reserved
10 Reserved
11 Reserved
DF ST Z C F
CF
W
W W W W W
0 00 0 0 0 0