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Technical Q&As: Device Drivers
Mac OS X supports 10/100 Base-T, 1000 Base-T, and (in Mac OS X version 10.2.4 and later with an appropriate Ethernet card) Jumbo Frame Ethernet. Developers use Ethernet to take advantage of existing Ethernet networks or to enable networking at higher speeds than may be available using wireless networks. With the I/O Kit, Apple's object-oriented driver development framework, developers can create drivers for Ethernet network adapters.

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Adding dependencies with kmodload (HTML)
QA1097: Illustrates how to specify dependencies when using kmodload.
2001-12-05
Changing the TCP Window Size (HTML)
NW47: Describes how to change the TCP window size in Open Transport.
1997-03-14
The "chosen" node in the device tree (HTML)
HW88: Describes how to find the "chosen" node in the Open firmware device tree.
2000-09-05
The dreaded "incompatible flag -framework" error (HTML)
QA1096: Explains how to eliminate the incompatible flag -framework error in Project Builder.
2001-12-05
Expansion ROM device properties (HTML) ()
HW50: Describes the Open Firmware properties that should be included in a boot device's expansion ROM.
1999-03-29
Generating an NMI Without a Programmer's Switch (HTML) ()
QA1264: Explains how to generate a non-maskable interrupt (NMI) on CPUs without programmer's switches.
2004-04-26
Getting started with Forth (HTML) ()
HW53: Describes where FCode driver developers can get information about the Forth programming language.
1999-03-29
Installing an I/O Kit KEXT Without Rebooting (HTML)
QA1319: Describes the state of the art of installing I/O Kit kernel extensions (KEXTs) without requiring a restart.
2003-10-28
IODeviceTree & the IORegistry (HTML) ()
QA1120: Describes the IODeviceTree plane in the Mac OS X IORegistry.
2002-02-13
IOKit Framework Headers (HTML) ()
QA1107: Describes the differences between the headers in IOKit.framework and the I/O Kit headers in Kernel.framework.
2002-01-15
Is the Open Firmware device tree object oriented? (HTML)
HW80: Discusses the object-oriented attributes of the Open Firmware device tree.
1999-11-15
Issues with boot time KEXT loading (HTML) ()
QA1087: Explains how to solve problems with loading KEXTs at boot time.
2004-01-15
Making sense of IOKit error codes (HTML) ()
QA1075: Explains how to interpret I/O Kit error codes.
2002-02-07
Mapping kernel memory to user space on Mac OS X 10.2 (HTML) ()
QA1197: Describes a change to mapping kernel memory to user space affecting Mac OS X 10.2 and later.
2002-09-13
The "packages" node in the device tree (HTML)
HW90: Describes the "packages" node in the Open Firmware device tree.
2000-09-05
Power Management; Policy Maker vs. Power Controller (HTML) ()
QA1121: Describes the differences between a Power Management Policy Maker and a Power Management Power Controller.
2002-02-13