Apple Desktop Computer manual Chrp

Page 70

A P P E N D I X A

Abbreviations

CHRP

Common Hardware Reference Platform

CPU

central processing unit

CRM

Communications Resource Manager

CRT

cathode ray tube, a video display device

DAA

data access adapter (a telephone line interface)

DAC

digital-to-analog converter

DIMM

Dual Inline Memory Module

DMA

direct memory access

EDO

extended data out

EEPROM

electrically eraseable programmable ROM

G3

Generation 3, the third generation of PowerPC

 

microprocessors, including the PPC 740 and PPC 750

GND

ground

HFS

hierarchical file system

HID

human interface device, a class of USB devices

IC

integrated circuit

IDE

integrated device electronics

IEC

International Electrotechnical Commission

I/O

input and output

IR

infrared

IrDA

Infrared Data Association

ISO

International Organization for Standardization

JEDEC

Joint Electron Device Engineering Council

JIS

Japanese Industrial Standards

L1

level 1 or first level, a type of CPU cache

L2

level 2 or second level, a type of CPU cache

LED

light emitting diode

Mac OS

Macintosh Operating System

MESH

the name of an Apple custom IC

modem

modulator-demodulator, a data communications interface

 

for use with analog telephone lines

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Contents Apple iMac Computer Page Contents Devices and Ports RAM ExpansionSoftware RtasAppendix Abbreviations Index Rtas NV-RAMFigures and Tables Page Contents of This Note About This Developer NoteMac OS PowerPC G3 MicroprocessorSupplemental Reference Documents ATA DevicesUSB Devices Open FirmwareE F a C E Introduction Features Case and External Features Shows a front view of the computerFront view 2Side view showing I/O bay Compatibility Issues System SoftwareVideo RAM Expansion Modules Main RAM Expansion ModulesUSB Ports and Devices Page Architecture Architecture G3 Microprocessor Processor moduleBackside Cache Memory Controller and PCI Bridge Main Logic BoardController IC Video Display Subsystem USB ControllerBuilt-in Modem Infrared Link Module Devices and Ports USB Connectors USB PortsTransfer Types Supported GNDUSB Compatibility Issues ADB CompatibilityUSB Storage Devices Serial Port CompatibilityMacintosh-To-Macintosh Connections USB ControllerKeyboard Keyboard LayoutMouse Keyboard and USBHard Disk Drive Video DisplayInfrared Communication Link Sound SystemBuilt-in Microphone Sound InputsSound Outputs External Sound InputExternal Sound Output Sound SpecificationsHeadphone Jacks Total harmonic distortion Ethernet Port Internal ModemPage RAM Expansion Expansion Slots Removing the Logic Board AssemblyPlacing the Computer Face Down Removing the bottom cover Unfastening the CablesRAM Expansion 3Logic board assembly handle and retaining screws Removing the Retaining ScrewsRemoving the Logic Board Assembly Removing the EMI ShieldLocations of the Expansion Slots Main RAM Expansion 6Locations of the RAM expansion slotsMechanical Design of RAM SO-DIMMs Electrical Design of RAM SO-DIMMsSdram Devices Configuration of RAM SO-DIMMs RAM SO-DIMM Electrical Limits Address MultiplexingVideo RAM Expansion Page Software Why Make This Change? What Has Changed Features of the New Approach User Experience PerformanceRAM Footprint Data Structures and FilesBoot ROM Contents Mac OS ndrv Drivers RtasToolbox Image File Contents Trampoline Code NewWorld Boot ProcessToolBox ROM Image What Is Different Interrupt HandlingOutmoded Resources RAM FootprintNanoKernel Startup Disk Control PanelInterrupt Layout Open Firmware and the Device TreeMachine Identification Software Abbreviations Chrp NMI Page Index Nvram X, Y, Z Allen Watson