Abstract
The design of a fast microprogrammed direct memory access processor for a PDP-11/34 is described. The controller is able to address a storage area of 128K-16 bit words, enabling us to record several conventional spectra and loss-corrected spectra of 4096 channels in three byte precision simultaneously and in short temporal succession. Beyond it, the interface contains: a) system timing controller for multisource multiscaling; b) two d/A-converters for general purposes; c) display generator with gray scale control for an external oscilloscope; d) two 16-bit parallel input/output ports, which provide interfacing beetween peripheral devices and the minicumputer.
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References
W. GRASS, Steuerwerke, Entwurf von Schaltwerken mit Festwertspeichern. Springer-Verlag, 1978.
Digital Equipment Corporation, Logic Handbook, 1976–77.
Digital Equipment Corporation, Peripherals and Interfacing Handbook
Digital Equipment Corporation, PDP-11 Processor Handbook 1978–79.
T. M. HEDGES, Replacing Hardwired Logic with Microcode. Electronics, November 9, 1978, p. 125.
J. J. PETRALE, PROM Controller Makes Fast Work of Serial Jobs. Electronics, April 12, 1979, p. 134.
FEULNER, Getaktete Logik mit Festwertspreichern. Arbeitsblatt Nr. 107, Elektronik 1977, Heft 9 und Heft 10.
W. I. FLETCHER, A. M. DESPAIN, Simplify Sequential Circuit Designs, Electronics Design 14, July 8, 1971, p. 70.
C. L. RICHARDS, An Easy Way to Design Complex Program Controllers. Electronics, Feb. 1, 1973, p. 107.
P. GÜNTHER, R. ESCHENBACH, Schaltungskonzept und Programmiersprache eines universellen Mikroprogramm-Steuerwerks Elektronik 1979, Heft 12.
Analog Devices, Complete High Speed 12-Bit Monolithic D/A-Converter AD 565 Product Description and Application Notes.
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Popp, R. A fast event processor for counting loss-corrected gamma-spectrometry. J. Radioanal. Chem. 61, 361–366 (1981). https://doi.org/10.1007/BF02517422
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DOI: https://doi.org/10.1007/BF02517422