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Reduced-complexity graphics

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1 Author(s)
Voorhies, D. ; Apollo Computer, Chelmsford, MA, USA

RISC (reduced-instruction-set-computer) CPU design concepts are used as the basis for a more general design philosophy applicable to graphics. The 3D graphics subsystem for the Apollo DN10000 is based on applying a RISC philosophy to the rendering problem. All structure-walking and floating-point computations are handled in the general-purpose CPU(s), and a simple, fast-cycle-time drawing engine synthesizes pixels and writes them into the bitmap. In the control and pixel-addressing logic, RISC ideas are applied directly and effectively; in color synthesis, however, they did not prove as useful. Several RISC concepts were ultimately fundamental to achieving design simplifications and allowed a better utilization of VLSI CMOS technology.<>

Published in:

Computer Graphics and Applications, IEEE  (Volume:9 ,  Issue: 4 )

Date of Publication:

July 1989

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