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Leopard Technical Notes: Hardware & Drivers
PCI is an interconnection technology used by various devices to provide additional capabilities. PC Cards are designed for adding low-latency peripherals to portable computers. Mac OS X supports the PCI, PCI-X, AGP, CardBus, and PC Card (PCMCIA) standards. Developers can use I/O Kit APIs to develop drivers for AGP and PCI devices.

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Building Universal I/O Kit Drivers (HTML)
TN2163: How to build a universal I/O Kit kernel driver while avoiding common pitfalls.
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.
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.
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.
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.
Dealing with PCI Expansion Chassis Problems (HTML) (日本語 HTML)
TN1135: Discusses solutions for compatibility issues between PCI cards and attached expansion chassis.
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.
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.