Intel 815 Manuel D’Utilisation
Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0
R
286
15.4.6.2.
UVSCALE—UV Scale Factor Register
Memory Address Offset:
44h (R/W)
On-chip Reg. Mem Addr Offset:
30144h (RO; debug path)
Default Value:
00h
Access:
see address offset above
Size:
32 bits
31
20 19
16
Vertical Scale Factor UV
Reserved
15 14
3
2
1
0
Reserved
Horizontal Scale Factor UV
Reserved
UV Down Scale Integer
Bit Description
31:20
Vertical Scale Factor UV. Used only in YUV planar modes to set the scale factor for the UV data. This
is different in formats where the UV data is vertically sub-sampled. Bit 31:20 1 > scale
is different in formats where the UV data is vertically sub-sampled. Bit 31:20 1 > scale
≥ 1/64 (the
maximum vertical up zoom is 64X)
19:15
Reserved.
14:3
Horizontal Scale Factor UV. Used only in YUV modes to set the scale factor for the UV data. This is
different in formats where the UV data is sub-sampled.
different in formats where the UV data is sub-sampled.
2
Reserved.
1:0
UV Down Scale Integer. This field is used only for vertical down scale. It specifies the integer portion
of the scale factor for UV data.
of the scale factor for UV data.