ISO/IEC INTERNATIONAL STANDARD 10861 ANSI/IEEE Std 1296 First edition 1994-04-27 Information technology-- Microprocessor systems- High-performance synchronous 32-bit bus: MULTIBUS II Technologiesdel'information- Systemesamicroprocesseurs- Bus 32 bits synchrone a haute performance: MULTIBUSII Reference number IEC ISO/EC 10861 : 1994(E) ANSI/IEEE Std 1296,1994 Edition Copyright Intermational Organization for Standardization No rep Not for Resale Abstract: The operation, functions, and attributes of a parallel system bus (PSB), called MULTI- BUs Il, are defined. A high-performance backplane bus intended for use in multiple processor sys- tems, the PSB incorporates synchronous, 32-bit multiplexed address/data, with error detection, and uses a 10 MHz bus clock. This design is intended to provide reliable state-of-the-art operation and to allow the implementation of cost-effective, high-performance VLSI for the bus interface. Memory, for messages. The message-passing design allows a VLSl implementation, so that virtually all mod- ules on the bus will utilize the bus at its highest performance-32 to 40 Mbyte/s. An overview of PsB, signal descriptions, the PsB protocol, electrical characteristics, and mechanical specifications are covered. Keywords: high-performance synchronous 32-bit bus, MULTIBUS Il, system bus architectures The Instituteof Electrical and Electronics Engineers, Inc 345 East 47th Street, New York, NY 10017-2394, USA Copyright 1994 by the Institute of Electrical and Electronics Engineers, Inc. All rights reserved. Published 1994. Printed in the United States of America. ISBN1-55937-368-7 No part of this publication may be reproduced in any form, in an electronic retrieval system or othewise, without the prior written permission of the publisher. April 27, 1994 SH16766 Cyhematinalgizatiandardizain mitted without license from IHS Not for Resale ISO/IEC 10861 : 1994 [ANS/EEE Std 1296,1994 Edition] Information technology- Microprocessor systems- High-performance synchronous 32-bit bus: MULTIBUS II Sponsor Technical Committee on Microprocessors and Microcomputers of the IEEEComputerSociety Adopted as an International Standard by the International Organization for Standardization andbythe International Electrotechnical Commission American National Standard Published by The Institute of Electrical and Electronics Engineers, Inc. Copyright Intermational Organization for Standardization No repr d by IHS Not for Resale Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standard- ization. National bodies that are members of ISO or IEC participate in the develop ment of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IECtechnicalcommitteescollaborateinfieldsof mutual interest.Otherinternational organizations, governmental and nongovernmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. Draft International Standards adopted by the joint tech- nical committee are circulated to national bodies for voting. Publication as an Inter- national Standard requires approval by at least 75% of the national bodies casting a vote. In 1990, ANSI/IEEE Std 1296-1987 was adopted by ISO/IEC JTC 1, as draft Interna- tional Standard ISO/IEC/DIS 10861. This draft was subsequently approved by ISO/ IEC JTC 1 in the form of this edition, which is published as International Standard ISO/IEC 10861 : 1994. International Organization for Standardization/International Electrotechnical Commission Case postale 56 : CH-1211 Geneve 20 · Switzerland Copyright Intemational Organizationfor Standardization No reprodu d without license from IHS Not for Resale IEEE Standards documents are developed within the Technical Committ