Media-accelerated Global Information Carrier

Engineering Specification

Revision 2.8
July 5, 2002

Authors:    Henry Juszkiewicz, Nathan Yeakel, Shri Amit, Richard Frantz, and Jason Flaks
Contact:    info@gibsonmagic.com
Latest Version:    http://www.gibsonmagic.com/

MaGIC is a trademark of Gibson Guitar Corp.

Copyright © 1999-2002 Gibson Guitar Corporation. U.S. Patent Pending

ALL RIGHTS RESERVED. NO PART OF THIS DOCUMENT MAY BE REPRODUCED IN ANY WAY WITHOUT PERMISSION FROM GIBSON GUITAR CORPORATION.

Revision History

The following is a record of all public releases of this document.

Revision	Release Date	Comments
1.0	9/18/99	Initial proposal to the audio industry at the 107th AES.
1.1	2/2/00	NAMM 2000.
2.0	1/20/01	NAMM 2001. Revised packet format.
2.1	9/21/01	Complete rewrite. Revised control protocol and application layer. New sample rate modification protocol.
2.2	10/18/01	Changed flag order in word 12. Added more figures and improved descriptions of all algorithms. Simplified the CTS/MIP control protocol. Fixed bug in control message numbering. Added section on Endian requirements.
2.3	11/16/01	Added MIDI message encapsulation and timecode, and a Blob component type. Also, added control packet requirement of at least 12 RX buffers on each port to ensure proper flow control.
2.4	1/22/02	Added copy protection bit. Added reset enumeration from any device on the network. Several minor edits to presentation.
2.5	2/18/02	Renamed A and B ports to Send and Recieve respectively. Rewrote chapter 8 to incorporate the Device Class and predefined Component address. Added several new figures and tables.
2.6	3/4/02	Added: Identify Neighbor control message, device-specific ports, their mnemonic names, channel counts, router configuration, product & vendor id, super toggle source component, auto control links, and error reporting control message. Updated all relevant packet formats to reflect the same.
2.7	4/17/02	Removed super toggle type. Added three channel number enable control types. Fixed several typos in Chapter 8 and Appendix G. Reserved port address 0. Reformatted Ret Comp Info and Ret Dev Info. Added tables describing component-specific data format for Ret Comp Info and Set New Value.
2.8	7/5/02	Renamed Send and Receive to OUT and IN respectively. Modified power spec to be compliant with IEEE802.3af. Assigned 0 as an invalid component address.

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The Specification describes the Media-accelerated Global Information Carrier (MaGIC). The specification describes MaGIC from an electrical, physical, data link protocol, and control protocol perspective.

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