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Introducing GPIB
To demonstrate the system, an example of a spectrometric experiment is given.
Laughery, K R 'Modeling human operators on a microcomputer: a micro version of SAINT' Simulation Vol 44 No 1 (January 1985) pp 10-16 Many simulation models may now be effectively developed on microcomputers if suitable simulation languages are available. Laughery discusses the modelling of human tasks using Micro SAINT, a version of the SAINT (systems analysis of integrated networks of tasks) modelling language for microcomputers. Micro SAINT iS a FORTRANbased language designed (so far) to run on an Apple II microcomputer with 48 kbyte of RAM. The paper covers construction of the task network; user-code development; execution of the model; and the efficiency and limitations of Micro SAINT.
Man'in, K 'ATE sparks renewed interest in GPIB fast-slewing dc supplies' EDN Vol 29 No 25 (13 December 1984) pp 232-238 Marrin reviews the characteristics of high-slew-rate GPIB-programmable DC power supplies and gives a data table for relevant models from Hewiett-Packard, Kepco, Kikusui, Sorenson and Systron-Donner. The performance characteristics of the various units are compared with respect to various automatic test equipment (ATE) applications. In particular, the tradeoffs between slewing speed and noise immunity and stability are discussed.
for switched-capacitor networks is reviewed. Particular attention is given to Fleischer and Laker's technique for designing switched-capacitor filters (Bell SysL Tech. J. Vol 58 (December 1979)), favoured by many because of its monolithic integration capability.
Schreier, P G 'Next-generation I/O software requires minimal programming' EDN Vol 29 No 25 (13 December 1984) pp 284-296 Analogue I/O boards for personal computers can provide a cheap way of monitoring and controlling variables in the laboratory or factory, but suitable software support is not always readily available. Schreier reviews recent product developments in the field of I/0 software. Software packages from 14 US suppliers are compared and their hardware requirements are discussed.
Thomas, H, Rowland, l J and Stoddart, l L 'A microprocessor-based instrument for measuring plant growth' J. Microcomput. AppL Vol 7 No 3/4 (July/October 1984) pp 217-223 A 6802-based device for measuring the extension of plant tissues is described. An optical linear transducer and comparator circuit converts growth into a series of digital pulses. These are fed to a microprocessor system comprising two Eurocardsized boards. One of these boards carries an RS232 interface and the other carries the CPU and the remaining components. Each comparator is monitored by an LED. Four separate transducer inputs may be handled by the present system. Software routines are discussed, as are the applications of the instrument to plant growth studies.
Sanz, l L and Cobi~In, F 'Switched capacitor filters - - an updated report' Mundo Electr6n. No 149 (March 1985) pp 117-124 (in Spanish)
Wohlers, T T 'The phenomenal promise of microbased CAD' Comput. Graphics World (February 1985) pp 43-50
The expanding field of applications
Nearly 25 000 microcomputer-based
vol 9 no 5 june 7985
CAD systems have been installed in the last 21/2 years, more than the last ten years' installations of minicomputer- and mainframe-based systems, says Wohlers. His paper touches on the economics of and markets for CAD workstations. A brief review of available configurations (software; display enhancers; input and output devices) is given, and the attractions and limitations of microbased systems are discussed. The author outlines the training requirements for micro-based CAD, and a case study of one US university's involvement in the field is given.
Wright, M 'Memory-management-chip schemes respond to super-lJC requirements' EDN Vol 30 No 4 (7 February 1985) pp 97-106 Memory-management chips are now approaching the complexity required by 32-bit microcomputers. In fact, says Wdght, some memorymanagement-unit (MMU) schemes have hardware which accomodates demand-paged virtual memory, a necessity for systems based on 32-bit microprocessors. The paper describes and compares MMUs from Motorola, National Semiconductor, Zilog and Intel. In addition, the workings of demand-paged virtual memory and the use of operating systems for memory management are discussed. A glossary of relevant terms is given.
'Introducing GPIB' Wireless World Vol 91 No 1589 (March 1985) pp 49-60 Conceived some 20 years ago, the general-purpose interface bus (GPIB) is now used throughout the world for linking a variety of instruments to computers. A brief overview is given of GPIB standards, specifications, implementation and compatibility problems. Types of device which may be connected to GPIB are discussed. A catalogue is provided of nearly 80 manufacturers of GPIB instruments and their products.
259
Laughery, K R 'Modeling human operators on a microcomputer: a micro version of SAINT' Simulation Vol 44 No 1 (January 1985) pp 10-16 Many simulation models may now be effectively developed on microcomputers if suitable simulation languages are available. Laughery discusses the modelling of human tasks using Micro SAINT, a version of the SAINT (systems analysis of integrated networks of tasks) modelling language for microcomputers. Micro SAINT iS a FORTRANbased language designed (so far) to run on an Apple II microcomputer with 48 kbyte of RAM. The paper covers construction of the task network; user-code development; execution of the model; and the efficiency and limitations of Micro SAINT.
Man'in, K 'ATE sparks renewed interest in GPIB fast-slewing dc supplies' EDN Vol 29 No 25 (13 December 1984) pp 232-238 Marrin reviews the characteristics of high-slew-rate GPIB-programmable DC power supplies and gives a data table for relevant models from Hewiett-Packard, Kepco, Kikusui, Sorenson and Systron-Donner. The performance characteristics of the various units are compared with respect to various automatic test equipment (ATE) applications. In particular, the tradeoffs between slewing speed and noise immunity and stability are discussed.
for switched-capacitor networks is reviewed. Particular attention is given to Fleischer and Laker's technique for designing switched-capacitor filters (Bell SysL Tech. J. Vol 58 (December 1979)), favoured by many because of its monolithic integration capability.
Schreier, P G 'Next-generation I/O software requires minimal programming' EDN Vol 29 No 25 (13 December 1984) pp 284-296 Analogue I/O boards for personal computers can provide a cheap way of monitoring and controlling variables in the laboratory or factory, but suitable software support is not always readily available. Schreier reviews recent product developments in the field of I/0 software. Software packages from 14 US suppliers are compared and their hardware requirements are discussed.
Thomas, H, Rowland, l J and Stoddart, l L 'A microprocessor-based instrument for measuring plant growth' J. Microcomput. AppL Vol 7 No 3/4 (July/October 1984) pp 217-223 A 6802-based device for measuring the extension of plant tissues is described. An optical linear transducer and comparator circuit converts growth into a series of digital pulses. These are fed to a microprocessor system comprising two Eurocardsized boards. One of these boards carries an RS232 interface and the other carries the CPU and the remaining components. Each comparator is monitored by an LED. Four separate transducer inputs may be handled by the present system. Software routines are discussed, as are the applications of the instrument to plant growth studies.
Sanz, l L and Cobi~In, F 'Switched capacitor filters - - an updated report' Mundo Electr6n. No 149 (March 1985) pp 117-124 (in Spanish)
Wohlers, T T 'The phenomenal promise of microbased CAD' Comput. Graphics World (February 1985) pp 43-50
The expanding field of applications
Nearly 25 000 microcomputer-based
vol 9 no 5 june 7985
CAD systems have been installed in the last 21/2 years, more than the last ten years' installations of minicomputer- and mainframe-based systems, says Wohlers. His paper touches on the economics of and markets for CAD workstations. A brief review of available configurations (software; display enhancers; input and output devices) is given, and the attractions and limitations of microbased systems are discussed. The author outlines the training requirements for micro-based CAD, and a case study of one US university's involvement in the field is given.
Wright, M 'Memory-management-chip schemes respond to super-lJC requirements' EDN Vol 30 No 4 (7 February 1985) pp 97-106 Memory-management chips are now approaching the complexity required by 32-bit microcomputers. In fact, says Wdght, some memorymanagement-unit (MMU) schemes have hardware which accomodates demand-paged virtual memory, a necessity for systems based on 32-bit microprocessors. The paper describes and compares MMUs from Motorola, National Semiconductor, Zilog and Intel. In addition, the workings of demand-paged virtual memory and the use of operating systems for memory management are discussed. A glossary of relevant terms is given.
'Introducing GPIB' Wireless World Vol 91 No 1589 (March 1985) pp 49-60 Conceived some 20 years ago, the general-purpose interface bus (GPIB) is now used throughout the world for linking a variety of instruments to computers. A brief overview is given of GPIB standards, specifications, implementation and compatibility problems. Types of device which may be connected to GPIB are discussed. A catalogue is provided of nearly 80 manufacturers of GPIB instruments and their products.
259