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Technical Q&As: Device Drivers
The Human Interface Device (HID) class is one of several device classes that the USB standard describes. In Mac OS X, the HID Manager supports access to these devices, including HID-class devices that are Bluetooth enabled. For access to devices that provide tactile sensation to the user, the Force Feedback framework defines a programming interface that is functionally similar to Microsoft's DirectInput API.

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Driver Gestalt & Icon Services (HTML) ()
DV37: Describes the interaction of Driver Gestalt & Icon Services
1999-10-05
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
HID Manager Event Data Underruns (HTML)
QA1038: Explains how to correctly handle HID Manager event queue data underruns.
2001-06-13
if and then in Forth (HTML) ()
HW54: Using the Forth word "if" requires a "then".
1999-03-29
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
Open Firmware and the devalias node (HTML)
HW95: Describes why the contents of the Open Firmware devalias node varies between Macintosh models.
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
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
Retain Counts of io_object_t Objects in IOKit.framework (HTML) ()
QA1195: Distinguishes between the retain counts of an I/O Kit kernel object and its io_object_t user space proxy.
2002-09-04
SDRAM Problems With Self-Powered USB Devices (HTML) ()
HW82: Alerts that non-compliant, self-powered USB devices plugged into a G4, can cause problems with low-voltage-sensitive SDRAM .
2003-08-21