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A clear and consistent set of environmental and social responsibility performance criteria for the design of computers (including notebook computers, desktop computers, integrated desktop computers, portable all-in-one computers, slates/tablets, small-scale servers, thin clients and workstations) and displays (including monitors and signage displays) is established, providing an opportunity for manufacturers to secure market recognition for their efforts. This standard is also intended to provide a tool for government, institutional, corporate, and consumer purchasers to identify products that demonstrate environmental and social responsibility leadership. This standard is intended to be updated and revised on a periodic basis to continue to set a higher performance standard for leadership products.
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IBM microcomputers --- Microcomputers --- IBM microcomputers. --- Microcomputers. --- Computers.
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This IEEE 1014 standard specifies a high-performance backplane bus for use in microcomputer systems that employ single or multiple microprocessors is specified. It is based on the VMEbus specification, released by the VME Manufacturers' Group in August of 1982. The bus includes four subbuses: data transfer bus, priority interrupt bus, arbitration bus, and utility bus. The data transfer bus supports 8-, 16-, and 32-bit transfers over a non-multiplexed 32-bit data and address highway. The transfer protocols are asynchronous and fully handshaken. The priority interrupt bus provides real-time interrupt services to the system. The allocation of bus mastership is performed by the arbitration bus, which allows to implement round robin and prioritized arbitration algorithms. The utility bus provides the system with power-up and power-down synchronization. The mechanical specifications of boards, backplanes, subracks, and enclosures are based on IEC 297 specification, also know as the Euroboard form factor.
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A general-purpose microcomputer system bus is defined, and the device-independent electrical and functional interface requirements that a module shall meet in order to interconnect and communicate unambiguously by way of the system are specified. Signal definitions and timing and electrical specifications are covered in detail for users who evaluate or design products that will be compatible with the IEEE Std 796 system bus structure. Only with the interface characteristics of microcomputer devices are covered; design specifications, performance requirements, and safety requirements of modules are omitted. The use of the standard will enable independently manufactured devices to be connected into a single functional system, permit products with a wide range of capabilities to be introduced to the system simultaneously, and result in a system with a minimum of restrictions on the performance characteristics of devices connected to the system.
Microcomputers --- Buses.
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This document provides a level of specification sufficient to design modules that are functionally, operationally, electrically, and mechanically compatible. Additional documents are necessary only to promote a higher degree of system level compatibility in manufacturers' products.
Microcomputers --- Buses.
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