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MuTEAM: an experience in the design of robust multimicroprocessor systems
Cushman, R H 'Support chips mature to upstage the host microprocessor' EDN Vol 31 No 6 (20 March 1986) pp 116-167 The microprocessor is no longer the sole, central system chip but just another component, according to EDN's chip directory for 1986. New trends to be identified in the support chip area are that manufacturers are increasingly supplying their chips in standard silicon form or as CAD megacells; also ISDN chip sets are nearly complete and are waiting for final standards.
Smith, D 'Programmable logic devices' EDN Vol 31 No 10 (15 May 1986) pp94109 In the past two years the operating speeds of bipolar PLDs have doubled and CMOS PLDs have emerged offering four times more circuitry per chip than older bipolar versions. This 'special report' surveys developments and products.
Multiprocessor systems
Corsini, P, Prete, C A and Simoncini, L 'MuTEAM: an experience in the design of robust multimicroprocessor systems' Computer SysL Sci. En& Vol 1 No 1 (October 1985) pp 23-35 MuTEAM is an experimental multiprocessor prototype supporting concurrent programming and decentralized non-hierarchical policies for both resource management and fault treatment. Experimentation is aimed at the interrelationship between these issues and their influence on the applications supported by the system.
Spyropoulos, C D and Evans, D J 'Performance analysis of priority-driven algorithm for multiprocessor model with independent memories: mean flow time criterion' Computer Syst. ScL Eng Vol 1 No 1 (October 1985) pp 36-46
vol 70 no 6 july~august 1986
Networks
Bowen, J 'Design of a simple Cambridge Ring interface adapted Computer Syst.ScL Eng.Vol 1 No 2 (January 1986) pp 9398 The Cambridge Ring, while accepted in the academic community, is not so widely used in industry due to the lack of commercially available interfaces, says Bowen. The interface described in this paper is between a type I Cambridge Ring node and the Motorola 68230 parallel interface/ timer chip.
Brookes, G R, Manson, G A and Thompson, J A 'Lattice and ring array topologies using transputers' Computer Comm. Vol 9 No 3 (June 1986) pp 121-125 Development of a parallel processor architecture using transputers is described for the example of a desk-top parallel processing computer. For such a workstation a general array is required and two alternative processor topologies -- lattice and ring arrays -- are compared. The ring array is found to offer significant advantages.
Chen, T N 'Ring network reliability and a faulttolerant Cambridge Ring architecture' JIEREVo156 No 5 (May 1986) pp 179183 Ring networks have inherent reliability problems - - a single node failure can bring down the network. Duplicate rings could avoid such a failure but are expensive. An altemative, the Centre-Switching Ring-Star, is proposed which is designed to bypass faulty nodes. The system is designed specifically for the Cambridge Ring network.
Dunlop, l and Rashid, M A 'Improving the delay characteristics of standard Ethemet for speech trans-
mission'JlERE Vo156 No 5 (May 1986) pp 184-186 Delay in the transmission of speech packets on Ethernet is caused by collisions with other packets. Performance can be improved by truncating the standard binary exponential back-off generated by nodes experiencing a collision, which, as shown in the paper, can be implemented in specialpurpose VLSI devices.
Mataix, l and de la Puente, J A 'Local area computer networks for industrial process control' Mundo Electronico No 163 (June 1986) pp 57-63 (in Spanish) Reviews current local area networks from the viewpoint of the design of distributed conbol systems. Emphasisis on token bus networks.
Suda, T and Yemini, Y 'Architectures for integrated service networks' Computer Comm. Vol 9 No 1 (February 1986) pp 3-8 Teo, E H and Georganas, N D 'Design and validation of a transport protocol for local area networks' Computer Comm. Vol 9 No 3 (June 1986) pp 115-120
Parallel processing
Salzwedel, M and Baisch, F 'Parallel processing suits real-time applications' EDN Vol 31 No 6 (20 March 1986) pp 213-220 A parallel processing computer has been developed by the Aerospace Medicine Institute of the West German Space Agency for realtime data acquisition, analysis and control applications. Called Spacemed, the system processes electrocardiogram and impedance-cardiogram waveforms from astronauts during space shuttle missions, at rates from )<1 to ×10 realtime, and at sampling rates from 1 kHz to 10 kHz. The development of the system is explained.
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Smith, D 'Programmable logic devices' EDN Vol 31 No 10 (15 May 1986) pp94109 In the past two years the operating speeds of bipolar PLDs have doubled and CMOS PLDs have emerged offering four times more circuitry per chip than older bipolar versions. This 'special report' surveys developments and products.
Multiprocessor systems
Corsini, P, Prete, C A and Simoncini, L 'MuTEAM: an experience in the design of robust multimicroprocessor systems' Computer SysL Sci. En& Vol 1 No 1 (October 1985) pp 23-35 MuTEAM is an experimental multiprocessor prototype supporting concurrent programming and decentralized non-hierarchical policies for both resource management and fault treatment. Experimentation is aimed at the interrelationship between these issues and their influence on the applications supported by the system.
Spyropoulos, C D and Evans, D J 'Performance analysis of priority-driven algorithm for multiprocessor model with independent memories: mean flow time criterion' Computer Syst. ScL Eng Vol 1 No 1 (October 1985) pp 36-46
vol 70 no 6 july~august 1986
Networks
Bowen, J 'Design of a simple Cambridge Ring interface adapted Computer Syst.ScL Eng.Vol 1 No 2 (January 1986) pp 9398 The Cambridge Ring, while accepted in the academic community, is not so widely used in industry due to the lack of commercially available interfaces, says Bowen. The interface described in this paper is between a type I Cambridge Ring node and the Motorola 68230 parallel interface/ timer chip.
Brookes, G R, Manson, G A and Thompson, J A 'Lattice and ring array topologies using transputers' Computer Comm. Vol 9 No 3 (June 1986) pp 121-125 Development of a parallel processor architecture using transputers is described for the example of a desk-top parallel processing computer. For such a workstation a general array is required and two alternative processor topologies -- lattice and ring arrays -- are compared. The ring array is found to offer significant advantages.
Chen, T N 'Ring network reliability and a faulttolerant Cambridge Ring architecture' JIEREVo156 No 5 (May 1986) pp 179183 Ring networks have inherent reliability problems - - a single node failure can bring down the network. Duplicate rings could avoid such a failure but are expensive. An altemative, the Centre-Switching Ring-Star, is proposed which is designed to bypass faulty nodes. The system is designed specifically for the Cambridge Ring network.
Dunlop, l and Rashid, M A 'Improving the delay characteristics of standard Ethemet for speech trans-
mission'JlERE Vo156 No 5 (May 1986) pp 184-186 Delay in the transmission of speech packets on Ethernet is caused by collisions with other packets. Performance can be improved by truncating the standard binary exponential back-off generated by nodes experiencing a collision, which, as shown in the paper, can be implemented in specialpurpose VLSI devices.
Mataix, l and de la Puente, J A 'Local area computer networks for industrial process control' Mundo Electronico No 163 (June 1986) pp 57-63 (in Spanish) Reviews current local area networks from the viewpoint of the design of distributed conbol systems. Emphasisis on token bus networks.
Suda, T and Yemini, Y 'Architectures for integrated service networks' Computer Comm. Vol 9 No 1 (February 1986) pp 3-8 Teo, E H and Georganas, N D 'Design and validation of a transport protocol for local area networks' Computer Comm. Vol 9 No 3 (June 1986) pp 115-120
Parallel processing
Salzwedel, M and Baisch, F 'Parallel processing suits real-time applications' EDN Vol 31 No 6 (20 March 1986) pp 213-220 A parallel processing computer has been developed by the Aerospace Medicine Institute of the West German Space Agency for realtime data acquisition, analysis and control applications. Called Spacemed, the system processes electrocardiogram and impedance-cardiogram waveforms from astronauts during space shuttle missions, at rates from )<1 to ×10 realtime, and at sampling rates from 1 kHz to 10 kHz. The development of the system is explained.
341