ANSI/IEEE Std 1196-1987 An American National StandardIEEE Standard for a Simple 32-Bit Backplane Bus: NuBus -Description

Content

• 1. General
• • 1.1 Scope
  • 1.2 Objective
  • 1.3 Purpose
  • 1.4 Definitions
  • • 1.4.1 General
    • 1.4.2 Protocol
    • 1.4.3 Physical
  • 1.5 References
• 2. Overview
• • 2.1 Bus Lines
  • • 2.1.1 Utility Signals
    • 2.1.2 Bus Data Transaction Signals
    • 2.1.3 Arbitration System Signals
    • 2.1.4 Power Lines
  • 2.2 Bus Operation
  • • 2.2.1 Fundamental Concepts
    • 2.2.2 Examples of Transactions
• 3. Specification
• • 3.1 Protocol
  • • 3.1.1 Signal Determinacy
    • 3.1.2 Bus Cycles
    • 3.1.3 Transactions
    • 3.1.4 Block Transfers
    • 3.1.5 Attention Cycles
    • 3.1.6 Arbitration
    • 3.1.7 Address Space
    • 3.1.8 Utility Functions
  • 3.2 Physical
  • • 3.2.1 Timing
    • 3.2.2 DC and AC Specifications for Signals
    • 3.2.3 Backplane (Signal) Characteristics
    • 3.2.4 Voltage Specifications
    • 3.2.5 Mechanical Specifications—Triple Height Modules
    • 3.2.6 Mechanical Specifications—PC-Style Boards
    • 3.2.7 Pin Assignments
  • 3.3 Compliance
  • • 3.3.1 Modules
    • 3.3.2 Backplane
  • A.1 Locking
  • A.2 Technology Dependence
  • A.3 Flow Control
  • A.4 Single Address Space
  • A.5 Non-Master Request Versus Event Cycles
  • A.6 Capacitive Loading
  • A.7 Bus Clock
  • A.8 Termination
  • A.9 Byte Addressing on Bus
  • A.10 Fairness
  • A.11 Elimination of Switches and Jumpers
  • A.12 Preferred I/O Cabling
  • A.13 Reserved Attention Cycles

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