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1-20 Chapter 1: 7401-2xxx and 3xxx Product Overview
The Processor Boards support linear addressing by creating a "hole" in
the memory address space at the 63 MB boundary. When the system is
configured for 64 MB and linear addressing is enabled, the last 1 MB of
system memory is unusable; therefore, the board will report that total
available system memory is 63 MB.
Because a hole in memory creates a non-contiguous address space,
enabling linear addressing when total system DRAM is greater than 64
MB is not recommended. Video linear addressing is enabled through
PC Setup under the Integrated Peripherals menu.
The processor also supports VESA standards such as the VESA DPMS
protocol to place a DPMS compliant monitor into power savings
modes.
Release 2.5 processor boards with the Lynx 3DM/3DM+ chip support
the following DirectX 6 Direct Draw and Direct 3D graphics functions.
• Rasterization acceleration
• Z buffer
• Alpha comparison
• Texture filtering
• Texture blending
• Mimap support
• Vertex and Global fogs
• Diffuse and specular color
• Alpha blending
• Triangle and line drawing
The following DirectX 8 functions are not supported:
• TnL
• Vertex shader
• Pixel shader
• Bump mapping
• Box mapping