SCSI: Understanding the Small Computer System Interface

Description

An authoritative, detailed overview of the multi-faceted, flexible peripheral interface--straight from NCR. This sourcebook provides an in-depth explanation of the SCSI used on NeXT and MAC IIX computers, among others. ISBN 0-13-796855-8......Page 4 Contents......Page 5 FOREWORD......Page 9 PREFACE......Page 11 What Is The Purpose Of This Book?......Page 13 What Is The History Of SCSI?......Page 14 Why Use SCSI?......Page 15 What Systems Support An SCSI Bus?......Page 16 What Is NCR's SCSI Connection?......Page 18 NCR's SCSI Chips......Page 19 NCR's SCSI Subsystems......Page 20 Understanding SCSI - General Overview......Page 21 What Configurations Are Available?......Page 23 Single Host / Single Controller......Page 24 Single Host / Multiple Controllers......Page 25 Multiple Hosts / Single Controller......Page 26 Multiple Hosts / Multiple Controllers......Page 27 What Control Signals Are Used?......Page 28 How Is The Communication Mode Established?......Page 29 Understanding SCSI - Detailed Overview......Page 30 What Are The SCSI Bus Signal Specifications?......Page 32 How Are The SCSI Signals Terminated?......Page 35 SEL (Select)......Page 37 ACK (Acknowledge)......Page 38 RST (Reset)......Page 39 How Is Communication On The Bus Controlled?......Page 40 Arbitration Phase......Page 42 Information Transfer Phases......Page 43 What Are The SCSI Bus Phase Sequences?......Page 44 Non-Arbitrating Systems......Page 45 Arbitrating Systems......Page 46 What Are SCSI Bus Conditions?......Page 48 Reset Condition......Page 49 Soft Reset Option......Page 50 What Are The Messages?......Page 51 Initiator Detected Error (05)......Page 52 Identify (80 to FF)......Page 53 Command Codes......Page 54 Saved Pointers......Page 56 Save Data Pointer Message......Page 57 3 ■ Selection Phase......Page 58 5 ■ Command Phase......Page 60 8 ■ Message-in Phase......Page 62 What Is The Common Command Set?......Page 64 What Is SCSl-2?......Page 65 Fast SCSI......Page 66 Command Set Enhancements......Page 67 What Is The Trend In SCSI?......Page 68 Glossary......Page 69 Index......Page 77