The 1 Teraflops QCDSP computer

The QCDSP computer (Quantum Chromodynamics on Digital Signal Processors) is an inexpensive, massively parallel computer intended primarily for simulat ions in lattice gauge theory. Currently, two large QCDSP machines are in fu ll-time use: an 8,192 processor, 0.4 Teraflops machine at Columbia Universi ty and an 12,288 processor, 0.6 Teraflops machine at the RIKEN-BNL Research Center at Brookhaven National Laboratory. We describe the design process, architecture, software and current physics projects of these computers. (C) 1999 Elsevier Science B.V. All rights reserved.