Intel 815 Manuel D’Utilisation
Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0
R
280
15.4.3.4.
INIT_PH—Initial Phase Register
Memory Address Offset:
28h (R/W)
On-chip Reg. Mem Addr Offset:
30128h (RO; debug path)
Default Value:
00h
Access:
see address offset above
Size:
32 bits
31
6 5
0
Reserved
Initial Phase minus one
Bit Description
31:6
Reserved.
5:0
5
4
3
2
1
0
Initial Phase minus one. These bits provide a method of creating a negative initial phase. If the
corresponding bit is set, the initial phase is the register value minus one. These bits should only be set
in cases where the buffer pointer is pointing to the first pixel of the line or column because it will
effectively cause the first pixel to be duplicated.
corresponding bit is set, the initial phase is the register value minus one. These bits should only be set
in cases where the buffer pointer is pointing to the first pixel of the line or column because it will
effectively cause the first pixel to be duplicated.
Y Vertical Buffer / Field 0
Y Vertical Buffer / Field 1
Y Horizontal
UV Vertical Buffer / Field 0
UV Vertical Buffer / Field 1
UV Horizontal