User's Manual

Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0
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12.3.17. BR16—Pattern Expansion Background & Solid Pattern Color
Memory Offset Address: 40040h
Default: None
Attributes: RO; DWord accessible
31 24 23 0
Reserved. MBZ Pattern Expansion Background Color Bits [23:0]
Bit Descriptions
31:24 Reserved. Must be Zero.
23:0 Pattern Expansion Background Color Bits [23:0]. These bits provide the one, two, three, or four
bytes worth of color data that select the background color to be used in the color expansion of
monochrome pattern data during BLT operations.
Whether one, two, three, or four bytes worth of color data is needed depends upon the color depth to
which the BLT Engine has been set. For a color depth of 24bpp, 16bpp and 8bpp, bits [23:0], [15:0] and
[7:0], respectively, are used.
12.3.18. BR17—Pattern Expansion Foreground Color
Memory Offset Address: 40044h
Default: None
Attributes: RO; DWord accessible
31 24 23 0
Reserved. Must be Zero Pattern Expansion Foreground Color Bits [23:0]
Bit Descriptions
31:24 Reserved. Must be Zero.
23:0 Pattern Expansion Foreground Color Bits [23:0]. These bits provide the one, two, three, or four bytes
worth of color data that select the foreground color to be used in the color expansion of monochrome
pattern data during BLT operations.
Whether one, two, or three, or bytes worth of color data is needed depends upon the color depth to
which the BLT Engine has been set. For a color depth of 24bpp, 16bpp and 8bpp, bits [23:0], [15:0] and
[7:0], respectively, are used.