Rastergraf
General Information 1-3
1.2.1 Borealis Graphics Controller
The Rastergraf Borealis 2D/3D graphics controller chip is a 128-bit
graphics controller with accelerated 2D and 3D patterned lines and shaded
triangles, Z buffer, and 3D volume clipping. It provides a high
performance 33/66 MHz PCI 2.1 compliant interface with no additional
external logic required.
Key Borealis Device Features
•
33/66 MHz PCI Interface
•
PCI Bus Master Event Notification
•
100 MHz SGRAM Memory Controller with Block Writes
•
Texture Mapping Capabilities
•
Perspective Correction
•
Point Sampling, Bilinear and Trilinear filtering
•
Full Level-of-Detail Per-Pixel MIP Mapping
•
Separate Texture Mipmapping Minification and Magnification filtering
•
Full OpenGL Texture Decal, Blend and Modulation Modes
•
RGB Modulation Lighting Effects
•
Support Palletized Textures: 1, 2, 4 and 8 bit
•
Support Non-Palette Textures: 8, 16, and 32 bit
•
Floating-point Triangle Setup with Vertex Level Commands
•
Flat and Gouraud Shaded line drawing, with patterning
•
Table and Vertex Fog
•
Specular Highlighting
•
Full Alpha blending
•
Alpha Compare Testing
•
3D Color Keying with Color Range Support
•
Backface Culling
•
Bilinearly Filtered Scaling
•
Power of 2 Display Zooming
•
Support 8, 16, 32 bits per pixels Destination Format
•
16 and 24 bit per pixel Z Buffer Support
•
Hardware 3D Volume Clipping
•
16-bit Logical Addressing in both X and Y
•
Two configurable frame buffer windows
•
Transparent BLT and Two operand BitBLT
•
Display List Processor
•
Color Space Converter: YUV-RGB Conversion
•
VGA
•
250 MHz RAMDAC
•
0.35 micron 3.3 volt CMOS process
•
388 PBGA (Plastic Ball Grid Array)
