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Barracuda Design

Barracuda PCI 3D Graphics Generator

Barracuda is a self-contained PCI compliant graphics card that is based around high speed processing and pixel rendering processors. It has a powerful onboard polygon processor with dedicated local system memory that is expandable to a total of 128 Mbytes per card. Dedicated hardware rendering engines generate pixels in an 8 MByte double buffered video memory. Connection to the PC host is via a standard PCI bus expansion slot. Digital polygon and pixel interfaces provide dedicated data pathways for expansion to other boards in the Barracuda family.

The design consisted of a complex digital / analog board design and significant FPGA design using ALTERA gate arrays.

The primary architectural features are:

  • On board MIPS R7000 RISC processor
  • 64Mbyte SDRAM Processor Memory
  • ProprietarySDRAM Controller (ALTERA FPGA)
  • Multiplechannel 3dfx Rendering Pipelines
  • Proprietary Pixel Formatting Unit for Anti-Aliasing (ALTERA FPGA)
  • Video Output Stage
  • PCI Bridge hardware
  • PCI card form-factor

Physical parameters:

  • Dimensions 340 mm x 122 mm
  • Geometry Track Thickness 0.15 mm
  • Spacing 0.15 mm
  • Layer Count Signal 8
  • Power 4
  • Via Size 0.3 mm
 
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