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HEWLETT-PACKARD
CONFIDENTIAL


DIO BUS SPECIFICATION
VERSION 1.0

APRIL 1 6, 1984

HP DRAWING NO: 5955-7669




DOCUMENT CONTROL

CHANGES'TO"THIS DOCUMENT SHOULD BE .
COORDINATED THROUGH THE RND R&D LAB.,




DISTRIBUTION

THIS DOCUMENT IS DISTRIBUTED BY THE
RND R&D LAB.
010 BUS SPECIFICATION




PRINTING HISTORY

First draft: December 14, 1982
Second draft: March 27, 1983

Version 1.0: April 16, 1984


Copyright ~ Hewlett-Packard Co. 1984


This material contains proprietary information protected by
copyright laws. Any reproduction, photocopying or translation of
any portion of this document to any foreign or computer language
without the expressed written consent of Hewlett-Packard Company
is forbidden.




HP CONFIDENTIAL -- Version 1.0
DIO BUS SPECIFICATION



TABLE OF CONTENTS




CHAPTER 1 FOREWARD . . . 1


CHAPTER 2 INTRODUCTION
2.1 OBJECTIVES OF THE DIO BUS SPECIFICATION. . 2
2.2 PROCEDURE FOR RESOLVING CHANGES. . . . 3
2.3 WHAT IS NOT COVERED IN THIS DOCUMENT . 3
2.4 RECOMMENDED DESIGN METHODOLOGY. 4

CHAPTER 3 DIO BUS BACKGROUND INFORMATION

3.1 SPECIFICATION TERMINOLOGY. 5
3.2 INTERFACE SYSTEM ELEMENTS. 6
3.3 BUS SUBSYSTEMS . . . . . 8
3.4 BUS TIMING BACKGROUND . . . 9


CHAPTER 4 I/O MEMORY MAP AND I/O CARD REGISTERS

4.1 SERIES 200 MEMORY MAP . .