Apple Desktop Computer Bedienungsanleitung Seite 5

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5
Placing the Computer Face Down 42
Removing the bottom cover 43
Unfastening the Cables 43
Removing the Retaining Screws 45
Removing the Logic Board Assembly 46
Removing the EMI Shield 46
Locations of the Expansion Slots 47
Main RAM Expansion 48
Mechanical Design of RAM SO-DIMMs 49
Electrical Design of RAM SO-DIMMs 49
SDRAM Devices 50
Configuration of RAM SO-DIMMs 51
Address Multiplexing 52
RAM SO-DIMM Electrical Limits 52
Video RAM Expansion 53
Chapter 5
Software
55
Why Make This Change? 56
What Has Changed 57
Features of the New Approach 58
Performance 59
RAM Footprint 59
User Experience 59
Data Structures and Files 59
Compatibility 59
Boot ROM Contents 60
POST Code 60
Open Firmware 61
Mac OS
'ndrv'
Drivers 61
RTAS 61
Toolbox Image File Contents 62
Open Firmware Script 62
Trampoline Code 63
ToolBox ROM Image 63
NewWorld Boot Process 63
What Is Different 64
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