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Leopard Technical Notes
Apple provides information hardware developers can use to create products that are compatible with Macintosh computers and programming interfaces software developers can use to create software that drives or accesses devices.

A guided learning path for hardware and driver developers new to Mac OS X.   Essential information for developing drivers and device-access software.   API references organized by framework.
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ATA Interface Modules (HTML)
TN1192: Describes how to write device drivers for ATA host bus controllers, ie. ATA Interface Module.
ATA 1999-12-01
Boot Blocks (HTML)
Deprecated - DV03: Warns that Boot Block form and function will change and describes undocumented Boot Blocks features.
Storage 1987-03-01
Building Universal I/O Kit Drivers (HTML)
TN2163: How to build a universal I/O Kit kernel driver while avoiding common pitfalls.
ATA, Audio, Ethernet, Fibre Channel, FireWire, Networking, PCI and PC Card, SCSI, Serial, Storage, USB 2008-08-18
CD-ROM Driver Calls (HTML)
Deprecated - DV22: Discusses public interface to Apple CD-ROM driver and supersedes information in AppleCD SC Developer's Guide.
ATA, SCSI, Storage 2000-08-14
Dealing with PCI Expansion Chassis Problems (HTML) (日本語 HTML)
TN1135: Discusses solutions for compatibility issues between PCI cards and attached expansion chassis.
PCI and PC Card 1998-08-01
Detecting low printer ink levels (HTML)
TN2144: How to detect printer supply levels using a low ink tool
Printing 2005-06-29
Digital CD Audio (HTML) (日本語 HTML)
TN1187: Describes digital audio on the Macintosh.
Audio 2000-04-01
FireWire: DCL Programs Under Mac OS X (HTML) (日本語 HTML)
TN2072: Describes the structure and creation of DCL programs under Mac OS X.
FireWire 2003-06-21
Fundamentals of Open Firmware, Part I: The User Interface (HTML)
TN1061: Describes the Open Firmware User Interface, Forth and the Open Firmware language used in Apple products.
PCI and PC Card 1996-07-01
Fundamentals of Open Firmware, Part II: The Device Tree (HTML)
TN1062: Describes the Open Firmware device tree.
Apple Hardware 1996-09-01
Fundamentals of Open Firmware, Part III: Understanding PCI Expansion ROM Choices for Mac OS (HTML)
TN1044: Recommended contents for PCI expansion ROMs, including a table of standard devices, properties and methods.
Open Firmware 2001-06-26
High-Speed SDRAM Design Considerations (HTML) (日本語 HTML)
TN1138: Illustrates certain issues with the design of high-speed SDRAM DIMM modules.
Apple Hardware 1998-08-01
I/O Kit Power Controller (HTML) (日本語 HTML)
TN2076: Describes code to include in a KEXT in order to register for power management events.
Apple Hardware, PCI and PC Card 2003-06-20
Multipathing with FibreChannel on Mac OS X (HTML)
TN2173: An explanation on how FibreChannel multipathing works on Mac OS X and how to design storage hardware to take advantage of it
Fibre Channel, SCSI, Storage 2007-03-23
New HID Manager APIs for Mac OS X version 10.5 (HTML)
TN2187: Mac OS X version 10.5 introduces new APIs for the HID Manager.
Human Interface Device & Force Feedback 2008-01-23
New Sound Input Driver Features (HTML) (日本語 HTML)
Deprecated - TN1124: Describes the visible features and changes, in Mac OS 8.1, for PCI sound input drivers.
Audio, PCI and PC Card 1998-04-01
Obtaining 16 Bits-Per-Color Data with CUPS Raster Printing (HTML)
TN2149: Obtaining 16 Bits-Per-Color Data with CUPS Raster Printing
Printing 2005-08-24
Open Transport STREAMS FAQ (HTML)
Deprecated - TN1117: Decribes writing STREAMS modules and drivers for use with Open Transport.
Networking 1997-12-01
Optimization Strategies for Mac OS X (HTML)
TN1174: Achieving the best possible performance in your applications.
Performance 1999-09-01
Power Management for Macintosh; getting started (HTML) (日本語 HTML)
TN2075: Outlines available documentation and its location for power management on Mac OS X and OS 9.
PCI and PC Card 2003-05-30
Power Manager 2.0 (HTML) (日本語 HTML)
TN1190: Describes the Macintosh Power Manager 2.0.
Apple Hardware 2000-08-14
PowerPC G5 Performance Primer (HTML) (日本語 HTML)
TN2087: Offers a high-level overview of how to maximize performance on G5 Macs.
Performance 2003-09-03
Running files from a hard drive in Open Firmware (HTML)
TN2001: Demonstrates editing, saving, and retrieving Open Firmware commands to a file on a Macintosh hard drive.
Open Firmware, PCI and PC Card 2000-09-22
Secrets of the GPT (HTML)
TN2166: Describes the new partition map format used by Intel-based Macintosh computers.
Storage 2006-11-06
Thermal considerations for Mac Pro FB-DIMMs (HTML)
TN2156: Design considerations and specifications for the AMB and Heat spreader for the Mac Pro
Apple Hardware 2006-11-10
Understanding and Debugging Kernel Panics (HTML) (日本語 HTML)
TN2063: Addresses kernel panics: what they are and how to debug the code that caused the panic.
AirPort/802.11, ATA, Audio, Ethernet, FireWire, Networking, PCI and PC Card, SCSI, Serial, Storage, USB 2008-08-14
Uniquely Identifying a Macintosh Computer (HTML) (日本語 HTML)
TN1103: How to identify a specific Macintosh computer.
Security 2006-04-25
Using AudioDeviceRead in Mac OS 10.4 (HTML)
TN2113: How to use AudioBufferLists with AudioDeviceRead in Tiger and beyond.
Audio 2006-11-29