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Compatibility Issues
USB Connectors
How to
What is
PowerPC G3 Microprocessor
NewWorld Boot Process
Features
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C H A P T E R 5
Figure
5-0
Listing
5-0
Table
5-0
Software
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Contents
Apple iMac Computer
Page
Contents
RAM Expansion
Devices and Ports
Rtas
Software
Rtas NV-RAM
Appendix Abbreviations Index
Figures and Tables
Page
About This Developer Note
Contents of This Note
ATA Devices
PowerPC G3 Microprocessor
Supplemental Reference Documents
Mac OS
Open Firmware
USB Devices
E F a C E
Introduction
Features
Shows a front view of the computer
Case and External Features
Front view
2Side view showing I/O bay
System Software
Compatibility Issues
Video RAM Expansion Modules
Main RAM Expansion Modules
USB Ports and Devices
Page
Architecture
Architecture
G3 Microprocessor
Processor module
Backside Cache
Memory Controller and PCI Bridge
Main Logic Board
Controller IC
Video Display Subsystem
USB Controller
Built-in Modem
Infrared Link Module
Devices and Ports
USB Ports
USB Connectors
GND
Transfer Types Supported
ADB Compatibility
USB Compatibility Issues
USB Controller
Serial Port Compatibility
Macintosh-To-Macintosh Connections
USB Storage Devices
Keyboard Layout
Keyboard
Keyboard and USB
Mouse
Video Display
Hard Disk Drive
Sound System
Infrared Communication Link
External Sound Input
Sound Inputs
Sound Outputs
Built-in Microphone
External Sound Output
Sound Specifications
Headphone Jacks
Total harmonic distortion
Internal Modem
Ethernet Port
Page
RAM Expansion
Expansion Slots
Removing the Logic Board Assembly
Placing the Computer Face Down
Unfastening the Cables
Removing the bottom cover
RAM Expansion
Removing the Retaining Screws
3Logic board assembly handle and retaining screws
Removing the EMI Shield
Removing the Logic Board Assembly
Locations of the Expansion Slots
6Locations of the RAM expansion slots
Main RAM Expansion
Electrical Design of RAM SO-DIMMs
Mechanical Design of RAM SO-DIMMs
Sdram Devices
Configuration of RAM SO-DIMMs
Address Multiplexing
RAM SO-DIMM Electrical Limits
Video RAM Expansion
Page
Software
Why Make This Change?
What Has Changed
Features of the New Approach
Data Structures and Files
Performance
RAM Footprint
User Experience
Boot ROM Contents
Rtas
Mac OS ndrv Drivers
Toolbox Image File Contents
Trampoline Code
NewWorld Boot Process
ToolBox ROM Image
Interrupt Handling
What Is Different
RAM Footprint
Outmoded Resources
Startup Disk Control Panel
NanoKernel
Interrupt Layout
Open Firmware and the Device Tree
Machine Identification
Software
Abbreviations
Chrp
NMI
Page
Index
Nvram
X, Y, Z
Allen Watson
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Contents