Locations of the Expansion Slots | Apple Desktop Computer specification

C H A P T E R 4

RAM Expansion

Figure 4-5		EMI shield

Locations of the Expansion Slots

Figure 4-6 shows the location of the two main RAM expansion slots and the video RAM expansion slot.

One of the main RAM expansion slots is on the bottom of the processor module and is normally occupied by the factory-installed SO-DIMM. The other main RAM expansion slot is on the top of the processor module and is available for a user-installed SO-DIMM.

The Expansion Slots

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Apple Desktop Computer manual Locations of the Expansion Slots

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 MicroprocessorSupplemental 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 USB Ports and Devices Main RAM Expansion ModulesVideo RAM Expansion Modules Page Architecture Architecture Backside Cache Processor moduleG3 Microprocessor Controller IC Main Logic BoardMemory Controller and PCI Bridge Built-in Modem USB ControllerVideo Display Subsystem Infrared Link Module Devices and Ports USB Ports USB Connectors GND Transfer Types Supported ADB Compatibility USB Compatibility Issues USB Controller Serial Port CompatibilityMacintosh-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 InputsSound Outputs Built-in Microphone Headphone Jacks Sound SpeciﬁcationsExternal Sound Output Total harmonic distortion Internal Modem Ethernet PortPage RAM Expansion Placing the Computer Face Down Removing the Logic Board AssemblyExpansion Slots 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 PerformanceRAM Footprint User Experience Boot ROM Contents Rtas Mac OS ndrv Drivers Toolbox Image File Contents ToolBox ROM Image NewWorld Boot ProcessTrampoline Code Interrupt Handling What Is Different RAM Footprint Outmoded Resources Startup Disk Control Panel NanoKernel Machine Identiﬁcation Open Firmware and the Device TreeInterrupt Layout Software Abbreviations Chrp NMI Page Index Nvram X, Y, Z Allen Watson