User's Manual

Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0
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12.3.19. BR18—Source Expansion Background, and Destination Color
Memory Offset Address: 40048h
Default: None
Attributes: RO; DWord accessible
31 24 23 0
Reserved. Must be Zero Source Expansion Background Color Bits [23:0]
Bit Descriptions
31:24 Reserved. Must be Zero. Debug implementation specific [31:25] = bmnewcliplw[6:0].
23:0 Source Expansion Background Color Bits [23:0]. These bits provide the one, two, or three bytes
worth of color data that select the background color to be used in the color expansion of monochrome
source data during BLT operations.
This register is also used to support destination transparency mode and Solid color fill.
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.
12.3.20. BR19—Source Expansion Foreground Color
Memory Offset Address: 4004Ch
Default: None
Attributes: RO; DWord accessible
31 24 23 0
Reserved. Must be Zero Source Expansion Foreground Color Bits [23:0]
Bit Descriptions
31:24 Reserved. Must be Zero. Debug implementation specific [31:26] = bmnewcliplw[12:07].
23:0 Pattern/Source Expansion Foreground Color Bits [23:0]. These bits provide the one, two, or three
bytes worth of color data that select the foreground color to be used in the color expansion of
monochrome source data during BLT operations.
Whether one, two, or three 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.