Samsung S5PC100, User Manual

Page: 1259 / 1863

3D-ACCELERATOR S5PC100 USER’S MANUAL (REV1.0)
9.6-32
3.9.8 Attribute Control Registers (HI_ATTRIB0~HI_ATTRIB9)
Attribute control Registers (HI_ATTRIB0~HI_ATTRIB9) represents how the DWORD data from CPU or in the
vertex buffer is interpreted.
If vertex data type is byte, unsigned byte, normalized byte, or normalized unsigned byte, a DWORD transferred
from CPU to Host Interface must contain four components. In the last DWORD, the unused 8-bit data is ignored.
Figure 9.6- 10 Memory Layouts for Byte-type Vertex Attributes in a DWORD from CPU or in the Vertex
Buffer.
In the above example, (8-bit x, 8-bit y, 8-bit z, 8-bit w) attribute can be transferred with one DWORD.If vertex data
type is short, unsigned short, normalized short, or normalized unsigned short, two attributes can be reside in a
DWORD. Therefore, two DWORDs are required for (16-bit x, 16-bit y, 16-bit z, and 16-bit w).
Figure 9.6- 11 Memory Layouts for Short-type Vertex Attribute in DWORDs from CPU or in the Vertex
Buffer.
Note that when DWORDs are stored in the Vertex Buffer, the above rule is also applied.
y
Input attribute 0 Control Register, R/W, Address = 0x0000_8040
y
Input attribute 1 Control Register, R/W, Address = 0x0000_8044
y
Input attribute 2 Control Register, R/W, Address = 0x0000_8048
y
Input attribute 3 Control Register, R/W, Address = 0x0000_804C
y
Input attribute 4 Control Register, R/W, Address = 0x0000_8050
y
Input attribute 5 Control Register, R/W, Address = 0x0000_8054
y
Input attribute 6 Control Register, R/W, Address = 0x0000_8058
y
Input attribute 7 Control Register, R/W, Address = 0x0000_805C
y
Input attribute 8 Control Register, R/W, Address = 0x0000_8060
y
Input attribute 9 Control Register, R/W, Address = 0x0000_8064