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CHAPTER 4
Expansion Modules
34 RAM Expansion Card
The PowerBook 520 and 540 computers accept the following expansion modules,
implemented as small circuit cards:
■ RAM expansion card
■ PDS card
■ modem card
This chapter includes descriptions and design guides for each of these expansion cards.
RAM Expansion Card 4
A connector on the secondary logic board accepts a RAM expansion card containing
from 8 MB to 32 MB of self-refreshing dynamic RAM. The card can contain from one to
four identical banks, with 2 MB, 4 MB, or 8 MB in each bank. Table 4-1 shows how the
banks can be implemented with standard RAM devices.
IMPORTANT
The RAM expansion card for the PowerBook 520 and 540 computers is a
new design; cards designed for other PowerBook computers cannot be
used in these new PowerBook models. ▲
▲
WARNING
Installation of a RAM expansion card in a PowerBook 520 or 540
computer must be done by an experienced technician. It requires care to
avoid damage to the pins on the RAM expansion connector. ▲
Electrical Design Guidelines for the RAM Expansion Card 4
This section provides the electrical information you need to design a RAM expansion
card for the PowerBook 520 and 540 computers.
Table 4-1 Configurations of RAM banks
Size of bank
Number of
devices per bank Device size (bits)
2 MB 4 512K × 8
4 MB 8 1 M × 4
4 MB 2 1 M × 16
8 MB 4 2 M × 8
- PowerBook 520 and 520c and 1
- PowerBook 540 and 540c 1
- Computers 1
- Contents 3
- I/O Features 4
- Expansion Modules 4
- Power Manager Interface 6
- Figures and Tables 7
- About This Developer Note 9
- PREFACE 10
- Typographical Conventions 0 11
- Standard Abbreviations 0 11
- Introduction 1 15
- Features 1 16
- Appearance 1 17
- 4 Appearance 18
- Configurations 1 19
- Peripheral Devices 1 19
- Compatibility Issues 1 20
- MacsBug Version 6.2.2 1 21
- Sound Sample Rates 1 21
- Architecture 2 23
- Processor/Memory Subsystem 2 24
- Architecture 25
- Processor/Memory Subsystem 11 25
- Input/Output Subsystem 2 26
- Power Manager IC 2 27
- Display Controller IC 2 28
- Combo IC 2 28
- Singer IC 2 28
- Ariel Video Output IC 2 28
- I/O Features 3 29
- Internal Hard Disk Drive 3 30
- Hard Disk Carrier Bracket 3 31
- Hard Disk Mounting Envelope 3 32
- Hard Disk Connector 3 32
- Signals on Connector J1 3 33
- Signals on Connector J2 3 34
- Internal Floppy Disk Drive 3 35
- Trackpad 3 36
- Keyboard 3 36
- Flat Panel Displays 3 37
- External Video Port 3 38
- Video Mirroring 3 39
- Video Monitors 3 39
- External Video Connector 3 40
- Monitor Sense Codes 3 40
- CHAPTER 3 41
- SCSI Port 3 42
- Serial Port 3 42
- SCSI Connectors 3 43
- Ethernet Port 3 44
- ADB Port 3 45
- Sound System 3 45
- Sound System 46
- Expansion Modules 4 47
- RAM Expansion Card 4 48
- Connector Pin Assignments 4 49
- Signal Descriptions 4 50
- Address Multiplexing 4 50
- RAM Expansion Card 37 51
- Signal name Description 51
- Banks of DRAM 4 52
- DRAM Device Requirements 4 53
- RAM Expansion Connector 4 54
- RAM Expansion Card Design 4 54
- RAM Expansion Card 41 55
- PDS Expansion Card 4 56
- PDS Expansion Card 43 57
- CHAPTER 4 58
- PDS Expansion Card 60
- PDS Power Consumption 4 63
- PDS Expansion Card 51 65
- Addressing Guidelines 4 66
- Timing Considerations 4 66
- PDS Card Shell 4 67
- PDS Card Connector 4 67
- PDS Card Design 4 68
- PDS Expansion Card 55 69
- Modem Expansion Card 4 70
- Modem Expansion Card 57 71
- Modem Expansion Card 72
- Modem Power 4 76
- Modem Card Connector 4 76
- Design of the Modem Card 4 76
- Modem Expansion Card 63 77
- DAA Interface Card 4 78
- DAA Connector 4 80
- DAA Interface Card 67 81
- The Multi-Country DAA Card 4 82
- DAA Interface Card 69 83
- Software 5 85
- ROM Software 5 86
- Power Manager Software 5 87
- Display Controller Software 5 87
- Sound Features 5 87
- Ethernet Driver 5 87
- PDS Support Software 5 88
- Support for Function Keys 5 88
- Intelligent Battery Support 5 88
- Trackpad Software 5 88
- System Software 5 89
- Selecting SVGA 5 90
- New Control Panels 5 91
- System Software 92
- Trackpad Control Panel 5 93
- Control Strip Control Panel 5 94
- AutoRemounter Control Panel 5 94
- Contents of Module Files 5 95
- Module Interface 5 95
- Module Reentrancy 5 96
- Message name 97
- number Description 97
- Utility Routines 5 100
- SBIsControlStripVisible 5 101
- SBShowHideControlStrip 5 101
- SBSafeToAccessStartupDisk 5 101
- SBLoadPreferences 5 102
- SBSavePreferences 5 102
- SBOpenModuleResourceFile 5 102
- SBGetDetachedIndString 5 103
- SBGetDetachIconSuite 5 103
- SBTrackpopupMenu 5 104
- SBTrackSlider 5 104
- SBShowHelpString 5 105
- SBGetBarGraphWidth 5 105
- SBDrawBarGraph 5 105
- Software 106
- Gestalt Selectors 5 107
- Power Manager Interface 6 109
- Things That May Change 6 110
- Checking for Routines 6 111
- CHAPTER 6 112
- PMSelectorCount 6 113
- PMFeatures 6 113
- GetSleepTimeout 6 114
- SetSleepTimeout 6 115
- GetHardDiskTimeout 6 115
- SetHardDiskTimeout 6 116
- HardDiskPowered 6 116
- SpinDownHardDisk 6 117
- IsSpindownDisabled 6 117
- SetSpindownDisable 6 117
- HardDiskQInstall 6 118
- HardDiskQRemove 6 119
- GetScaledBatteryInfo 6 119
- DESCRIPTION 120
- AutoSleepControl 6 121
- GetIntModemInfo 6 122
- SetIntModemState 6 123
- MaximumProcessorSpeed 6 123
- CurrentProcessorSpeed 6 124
- FullProcessorSpeed 6 124
- SetProcessorSpeed 6 125
- GetSCSIDiskModeAddress 6 125
- SetSCSIDiskModeAddress 6 126
- GetWakeupTimer 6 126
- SetWakeupTimer 6 127
- IsProcessorCyclingEnabled 6 128
- EnableProcessorCycling 6 128
- BatteryCount 6 129
- GetBatteryVoltage 6 129
- GetBatteryTimes 6 130
- V, W, X, Y, Z 142
- DEVELOPMENTAL EDITORS 144
- ILLUSTRATORS 144
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