ncr NCR 5385E 5386 SCSI Protocol Controller Users Guide May85 free download

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NCR 5385E15386 SCSI Protocol Controller User's Guide Microelectronics Division, Colorado Springs Copyright @1983, by NCR Corporation Dayton, Ohio All Rights Reserved Printed in U. S.A. This document contains the latest information available at the time of publication. However, NCR reserves the right to modify the contents of this material at any time. Also, all features, functions and operations described herein may not be marketed by NCR in all parts of the world. Therefore, before using this document, consult your NCR representative or NCR office for the information that is applicable and current. TABLE OF CONTENTS SECTION PAGE 1. INTRODUCTION ...3 2. INITIALIZATION ...4 3. INITIATOR ROLE ...5 3.1 Initiator Role Walkthrough ...7 3.2 Notes ...12 4. TARGET ROLE ...13 4.1 Target Role Walkthrough ... 16 4.2 Notes ...19 5. INTERRUPT SERVICE ROUTINES (ISR) ...20 5.1 General ...20 5.2 User Disconnected ISR ...21 5.3 User Connected as Target ISR ... " ... 22 5.4 User Connected as Initiator ISR ...24 5.4.1 Bus Service Interrupt ...25 5.5 Interrupt Summary ...26 6. SCSI BUS INTERFACE ...28 APPENDICES APPENDIX PAGE A. NCR 5385 SCSI Protocol Controller Register and Command Summary ... 34 B. Internal Registers ...35 C. Initiator/Target Role Flowchart ...36 LIST OF TABLES TABLE PAGE 5.1 Interrupt Summary ...