User's Manual

Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0
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15.4.5.2. SWIDQW—Source Width In QWords Register
Memory Address Offset: 38h (R/W)
On-chip Reg. Mem Addr Offset: 30138h (RO; debug path)
Default Value: 00h
Access: see address offset above
Size: 32 bits
31 24 23 16 15 9 8 0
Reserved UV Source Width in
QWs
Reserved Y/RGB Source Width in
QWs
Bit Description
31:24 Reserved.
23:16 UV Source Width in QWords. The number of QWs contained in a single line of planar UV source
data. Minimum size is two QWords.
15:9 Reserved.
8:0 Y/RGB Source Width in QWords. The number of QWs contained in a single line. In planar modes,
this is the Y source width. Minimum size is two QWords.