WAFER-LX Motherboard
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2.6 Graphics Support
The Geode LX processor’s Graphics Processor is a BitBLT/vector engine that supports
pattern generation, source expansion, pattern/source transparency, 256 ternary raster
operations, alpha blenders to support alpha- BLTs, incorporated BLT FIFOs, a GeodeLink
interface and the ability to throttle BLTs according to video timing. New features added to
the Graphics Processor include:
Command buffer interface
Hardware accelerated rotation BLTs
Color depth conversion
Paletized color
Full 8x8 color pattern buffer
Separate base addresses for all channels
Monochrome inversion
Table 2-1 lists a complete list of Geode LX graphics features. For more details, please
refer to the AMD website or the Geode LX series data book available from AMD.
Feature AMD Geode™ LX Processor
Color Depth 8, 16, 32 bpp (A) RGB 4 and 8-bit indexed
ROPs 256 (2-src, dest and pattern)
BLT Buffers FIFOs in Graphics Processor
BLT Splitting Managed by hardware
Video Synchronized BLT/Vector Throttle by VBLANK
Bresenham Lines Yes
Patterned (stippled) Lines Yes
Screen to Screen BLT Yes
Screen to Screen BLT with mono expansion Yes
Memory to Screen BLT Yes (throttled rep movs writes)
Accelerated Text No
Pattern Size (Mono) 8x8 pixels
Pattern Size (Color) 8x8 pixels
Monochrome Pattern Yes (with inversion)
Dithered Pattern (4 color) No
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