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116:. It described a basic DSP architecture with multiplier/accumulator, addressing unit, and control; the I/O, data, and control memories were planned to be off-chip until large-scale integration could make a single chip implementation feasible.
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The DSP1 specification was completed in 1978, with first samples tested in May 1979. This first implementation was a single-chip DSP, containing all functional elements found in today's DSPs including
123:(MAC), parallel addressing unit, control, control memory, data memory, and I/O. It was designed with a 20-bit fixed point data format, and 16-bit coefficients and instructions, implemented in a
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Boddie, Daryanani, Eldumtan, Gadenz, Thompson, Walters, Pedersen, "A Digital Signal
Processor for Telecommunications Applications," ISSCC Digest of Technical Papers, February 1980, p. 44.
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Chapman, R. C. ed., "Digital Signal
Processor," The Bell System Technical Journal, Special Edition, Vol. 60, No. 7, Part 2 (September 1981) pp. 1431–1701.
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Stanzione et al., "Final Report Study Group on
Digital Integrated Signal Processors," Bell Labs Internal Memorandum, October 1977.
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By
October 1979 other Bell Labs groups began development using the DSP1, most notably as a key component in AT&T's
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163:"The Legacy of DSP1", Electronic News, Nov 8, 1999
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