The UDI System Bus Binding Specification defines the requirements for use of the UDI Physical I/O Specification on what is known in UDI as the System Bus. The system bus abstraction may be used with built-in I/O on a system motherboard, and in general is intended for use with any non-self-identifying bus such as legacy ISA.

This is an optional extension to the UDI Physical I/O Specification, which is defined in a separate book. The intended audience for this book includes driver writers, environment implementors, and metalanguage implementors.

UDI drivers that require use of physical I/O on a System Bus must be written to conform to this specification, and can assume that all services described herein are available. Environments that don't need such drivers may choose not to support the System Bus extensions, but any environment that supports UDI drivers for devices on a System Bus must conform to this specification, as well as to the UDI Physical I/O Specification and the UDI Core Specification.

See the Document Organization chapter in the UDI Core Specification for a description of other books in the UDI Specification collection, as well as references to additional tutorial materials.

Status of This Document

This document has been reviewed by Project UDI Members and other interested parties and has been endorsed as a Final Specification. It is a stable document and may be used as reference material or cited as a normative reference from another document. This version of the specification is intended to be ready for use in product design and implementation. Every attempt has been made to ensure a consistent and implementable specification. Implementations should ensure compliance with this version.

Copyright Notice

Copyright © 2000-2001 Adaptec, Inc; Compaq Computer Corporation; Hewlett-Packard Company; International Business Machines Corporation; Interphase Corporation; Lockheed Martin Corporation; The Santa Cruz Operation, Inc; Sun Microsystems ("copyright holders"). All Rights Reserved.

This document and other documents on the Project UDI web site (www.project-UDI.org) are provided by the copyright holders under the following license. By obtaining, using and/or copying this document, or the Project UDI document from which this statement is linked, you agree that you have read, understood, and will comply with the following terms and conditions:

Permission to use, copy, and distribute the contents of this document, or the Project UDI document from which this statement is linked, in any medium for any purpose and without fee or royalty is hereby granted, provided that you include all of the following on ALL copies of the document, or portions thereof, that you use:

1. A link or URI to the original Project UDI document.
2. The pre-existing copyright notice of the original author, or, if it doesn't exist, a Project UDI copyright notice of the form shown above.
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When space permits, inclusion of the full text of this NOTICE should be provided. In addition, credit shall be attributed to the copyright holders for any software, documents, or other items or products that you create pursuant to the implementation of the contents of this document, or any portion thereof.

No right to create modifications or derivatives is granted pursuant to this license.

THIS DOCUMENT IS PROVIDED "AS IS," AND COPYRIGHT HOLDERS MAKE NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT, OR TITLE; THAT THE CONTENTS OF THE DOCUMENT ARE SUITABLE FOR ANY PURPOSE; NOR THAT THE IMPLEMENTATION OF SUCH CONTENTS WILL NOT INFRINGE ANY THIRD PARTY PATENTS, COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS.

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Acknowledgements

The authors would like to thank everyone who reviewed working drafts of the specification and submitted suggestions and corrections.

The authors would especially like to thank their significant others for putting up with the many hours of overtime put into the development of this specification over long periods.

Thanks to the following folks who contributed significant amounts of time, ideas, or authoring in support of the development of this specification or in working on the prototype implementations which helped us validate the specification:

Mark Evenson (HP)
Kurt Gollhardt (SCO)

Finally, thanks to David Roberts (Certek Software Designs) for designing the Project UDI logo.

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