Apple PowerBook 520 Technical Information Page 86
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CHAPTER 5
Software
72 ROM Software
This chapter describes the new ROM and system software features of the PowerBook 520
and 540 computers.
ROM Software 5
The ROM software in the PowerBook 520 and 540 computers is based on the ROM used
in previous PowerBook computers, with enhancements to support the many new
features of these computers. Some of the features this ROM was designed to support
include the following:
■ MC68040 and MC68LC040 microprocessors
■ Pratt memory controller
■ new Power Manager software
■ new display controller
■ new sound features
■ Ethernet
■ PDS support
■ function keys
■ smart batteries
■ trackpad
The following sections describe each of these features.
MC68040 and MC68LC040 Microprocessors 5
The MC68LC040 microprocessors used in the PowerBook 520 and 540 computers differ
from the MC68030 used in earlier PowerBook models in important ways such as the
sizes of the caches and the configurations of the control registers. The differences make
it necessary to use a different power cycling scheme on the PowerBook 520 and 540
computers.
The PowerBook 520 and 540 computers do not provide the economode reduced speed
feature found on the PowerBook 160 and 180 models.
Memory Controller Software 5
The memory control routines have been rewritten to operate with the Pratt IC, which has
a control register configuration different from that of the memory controller used in
earlier PowerBook models. The memory initialization and size code has been rewritten
to deal with
■ larger ROM size
■ new type of DRAM devices
■ new memory configurations
- 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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