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Technical Q&As: Hardware
Ethernet is the most widely used physical transport medium for local area networks (LANs). Based on IEEE 802.3, it makes use of a bus topology to transfer data. Mac OS X supports standard Ethernet (10 Mbit/s), Fast Ethernet (100 Mbit/s), and Gigabit Ethernet (1000 Mbit/s). All current Macintosh hardware supports standard and Fast Ethernet, and some newer hardware supports Gigabit Ethernet. Developers can use Ethernet to take advantage of existing Ethernet networks or to enable networking at higher speeds than may be available using wireless networks.
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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
Issues with boot time KEXT loading (HTML) ()
QA1087: Explains how to solve problems with loading KEXTs at boot time.
 2004-01-15
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
Making sense of IOKit error codes (HTML) ()
QA1075: Explains how to interpret I/O Kit error codes.
 2002-02-07
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
Adding dependencies with kmodload (HTML)
QA1097: Illustrates how to specify dependencies when using kmodload.
 2001-12-05
The dreaded "incompatible flag -framework" error (HTML)
QA1096: Explains how to eliminate the incompatible flag -framework error in Project Builder.
 2001-12-05
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 "packages" node in the device tree (HTML)
HW90: Describes the "packages" node in the Open Firmware device tree.
 2000-09-05
Is the Open Firmware device tree object oriented? (HTML)
HW80: Discusses the object-oriented attributes of the Open Firmware device tree.
 1999-11-15
Sample code for allocating an amount of dictionary space (HTML)
HW71: Discusses the allocation and the setting of memory for Dictionary space in Open Firmware.
 1999-10-11
What is the "dump" word and how do I use it? (HTML)
HW68: Describes the function of the Open Firmware word "dump" and how it can be used.
 1999-10-11
What numeric base is the default for the Open Firmware user interface? (HTML)
HW65: Describes how the default numeric base used by the Open Firmware user interface is hexadecimal.
 1999-10-11
Determining Open Firmware configuration variables (HTML) ()
HW56: Discusses how to determine the Open Firmware variables on a system.
 1999-03-29
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
Getting started with Forth (HTML) ()
HW53: Describes where FCode driver developers can get information about the Forth programming language.
 1999-03-29
Why did the name of the PCI bridge change? (HTML) ()
HW59: Explains the name change of the PCI bridge to the generic name "pci" in Open Firmware.
 1999-03-29
Are interrupts enabled while Open Firmware is running? (HTML) ()
HW44: Explains that interrupts are disabled when Open Firmware is running.
 1999-02-15
What are configuration variables in Open Firmware? (HTML) ()
HW38: Defines the configuration variables in Open Firmware.
 1999-02-15
Changing the TCP Window Size (HTML)
NW47: Describes how to change the TCP window size in Open Transport.
 1997-03-14
PCI Type 1 Cycles (HTML)
HW26: Describes the circumstances when the PowerMac generates a Configuration Type 1 command.
 1995-07-15