Introduction

• Features
• Case and External Features
• Compatibility Issues
• System Software
• Main RAM Expansion Modules
• Video RAM Expansion Modules
• USB Ports and Devices

Architecture

• Processor module
• G3 Microprocessor
• Backside Cache
• Memory Controller and PCI Bridge
• Main Logic Board
• I/O Controller IC
• USB Controller
• Video Display Subsystem
• Built-in Modem
• Infrared Link Module

Devices and Ports

• USB Ports
• USB Connectors
• Transfer Types Supported
• USB Compatibility Issues
• ADB Compatibility
• Serial Port Compatibility
• Macintosh-To-Macintosh Connections
• USB Storage Devices
• USB Controller
• Keyboard
• Keyboard Layout
• Keyboard and USB
• Mouse
• Hard Disk Drive
• Video Display
• Infrared Communication Link
• Sound System
• Sound Inputs
• Built-in Microphone
• External Sound Input
• Sound Outputs
• Internal Speakers
• External Sound Output
• Headphone Jacks
• Sound Specifications
• Ethernet Port
• Internal Modem

RAM Expansion

• The Expansion Slots
• Removing the Logic Board Assembly
• Placing the Computer Face Down
• Removing the bottom cover
• Unfastening the Cables
• Removing the Retaining Screws
• Removing the Logic Board Assembly
• Removing the EMI Shield
• Locations of the Expansion Slots
• Main RAM Expansion
• Mechanical Design of RAM SO-DIMMs
• Electrical Design of RAM SO-DIMMs
• SDRAM Devices
• Configuration of RAM SO-DIMMs
• Address Multiplexing
• RAM SO-DIMM Electrical Limits
• Video RAM Expansion

Software

• Why Make This Change?
• What Has Changed
• Features of the New Approach
• Performance
• RAM Footprint
• User Experience
• Data Structures and Files
• Compatibility
• Boot ROM Contents
• POST Code
• Open Firmware
• Mac OS 'ndrv' Drivers
• RTAS
• Toolbox Image File Contents
• Open Firmware Script
• Trampoline Code
• ToolBox ROM Image
• NewWorld Boot Process
• What Is Different
• Interrupt Handling
• Outmoded Resources
• RAM Footprint
• RTAS
• NV-RAM
• NanoKernel
• Startup Disk Control Panel
• Open Firmware and the Device Tree
• Interrupt Layout
• Machine Identification

Abbreviations