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Allocating and sharing memory with user space from an I/O Kit driver
(HTML)
( )
QA1197: Describes the preferred technique for allocating and sharing buffers in an I/O Kit kernel driver.
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AirPort/802.11, ATA, Audio, Bluetooth, Ethernet, Fibre Channel, FireWire, Networking, PCI and PC Card, Scanners, SCSI, Serial, Storage, USB |
2008-10-13
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Generating a Non-Maskable Interrupt (NMI)
(HTML)
()
QA1264: Explains how to generate a non-maskable interrupt (NMI) on modern Macintosh systems.
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AirPort/802.11, Apple Hardware, ATA, Audio, Bluetooth, Bonjour, Ethernet, Fibre Channel, FireWire, Human Interface Device & Force Feedback, Mac OS X Server, Networking, PCI and PC Card, Performance, Printing, QuickTime, Scanners, SCSI, Serial, Still Cameras, Storage, USB |
2008-10-13
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Programmatically causing restart, shutdown and/or logout
(HTML)
()
QA1134: Describes how to programmatically cause restart, shutdown, sleep or logout.
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Apple Hardware |
2008-09-24
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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.
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Audio, FireWire, Human Interface Device & Force Feedback, Printing, Scanners, SCSI, Still Cameras, Storage, USB |
2008-09-24
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IODeviceTree and the I/O Registry
(HTML)
()
QA1120: Describes the IODeviceTree plane in the Mac OS X I/O Registry.
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AirPort/802.11, Apple Hardware, ATA, Audio, Bluetooth, Ethernet, Fibre Channel, FireWire, Human Interface Device & Force Feedback, Networking, Open Firmware, PCI and PC Card, Printing, Scanners, SCSI, Serial, Still Cameras, Storage, USB |
2008-09-18
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Disabling Processor Cores on a Multi-Core System
(HTML)
()
QA1141: Describes how to disable processor cores on a multi-core system for testing purposes.
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Apple Hardware, Open Firmware, Performance |
2008-09-16
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Tips on USB driver matching for Mac OS X
(HTML)
QA1076: Gives some tips on getting USB driver matching to work.
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USB |
2008-08-14
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Video capture with multiple IIDC cameras
(HTML)
QA1365: Discusses factors which influence the number of IIDC cameras that can simultaniously be used for capture.
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FireWire |
2008-08-08
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Getting a Packet Trace
(HTML)
()
QA1176: Lists tools available for looking at the network packets on the wire.
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AirPort/802.11, Bonjour, Networking |
2008-06-03
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ExpressCard Prevents System Sleep
(HTML)
QA1517: Describes how some ExpressCard cards can prevent system sleep and how to fix the problem.
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AirPort/802.11, ATA, Ethernet, Fibre Channel, Networking, PCI and PC Card, Serial, USB |
2007-02-28
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The state of mDNSResponder
(HTML)
QA1339: Explains how to obtain information regarding the internal state of mDNSResponder.
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Bonjour, Networking |
2006-10-03
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Common QA and Roadmap for USB Software Development on Mac OS X
(HTML)
QA1370: Roadmap for development of USB Software on Mac OS X and some Common Questions and Answers
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USB |
2006-02-28
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The "packages" node in the device tree
(HTML)
HW90: Describes the "packages" node in the Open Firmware device tree.
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AirPort/802.11, Apple Hardware, ATA, Audio, Bluetooth, Bonjour, Ethernet, Fibre Channel, FireWire, Human Interface Device & Force Feedback, Mac OS X Server, Networking, PCI and PC Card, Performance, Printing, QuickTime, Scanners, SCSI, Serial, Still Cameras, Storage, USB |
2006-02-22
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Specifiying if the CPU or the GPU should be used for rendering.
(HTML)
QA1416: Which processor will be used for rendering in Core Image and how to affect it.
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Graphics & Imaging |
2005-08-16
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Mixing link-local IP addresses and routable IP addresses
(HTML)
QA1357: Explains how to enable communication between devices with link-local addresses and devices with routable addresses.
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Bonjour, Networking |
2005-07-06
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Sending SCSI or ATA commands to storage devices
(HTML)
()
QA1179: Explains that Mac OS X does not implement SCSI or ATA pass-through for many mass storage devices.
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Fibre Channel, FireWire, Scanners, SCSI, Storage, USB |
2005-05-10
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iSight - Configuring gain settings for IIDC cameras
(HTML)
QA1421: Discusses how to configure features of IIDC cameras, specifically gain for the iSight
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QuickTime |
2005-04-06
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Sequence Grabber - Determining the capture resolution of an IIDC device
(HTML)
QA1403: Discusses how to determine the resolution of a captured image from an IIDC device
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QuickTime |
2005-01-06
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Obtaining the name of an external MIDI Device from a MIDI Endpoint
(HTML)
QA1374: Get the names of external MIDI Devices from MIDI Endpoints.
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Audio |
2004-12-01
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Installing smart card reader drivers
(HTML)
QA1359: Updates obsolete information contained in the pcscd(8) man page on Mac OS X Jaguar and Panther.
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Serial, USB |
2004-08-30
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Bonjour service types used in Mac OS X
(HTML)
QA1312: Provides a list of common Bonjour service types used in Mac OS X.
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Bonjour |
2004-07-14
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Available FireWire Isochronous Bandwidth
(HTML)
QA1356: Discusses attempting to "pre-flight" an isochronous bandwidth allocation request by reading the currently available bandwidth.
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Audio, FireWire, QuickTime |
2004-07-07
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Discovering all advertised Bonjour service types
(HTML)
QA1337: Explains how to discover all Bonjour service types being advertised on the local network.
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Bonjour, Networking |
2004-06-01
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New PPD keywords available in Mac OS X version 10.3
(HTML)
QA1352: Describes the new PPD keywords available for CUPS filters in Mac OS X 10.3.
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Printing |
2004-05-26
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Bonjour enforces the service type format in Panther
(HTML)
QA1198: Explains why registering a Bonjour service might fail on Panther.
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Bonjour, Networking |
2004-03-23
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DDR SDRAM ICs for PowerBooks and iBooks that use Memory bus slewing
(HTML)
QA1344: Specifies DDR SDRAM IC optimization for PowerBooks and iBooks that use Memory bus slewing.
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Apple Hardware, Open Firmware |
2004-03-18
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Clearing mDNSResponder's cached records
(HTML)
QA1310: Clearing the Bonjour service cache (mDNSResponder's cached records) for testing purposes.
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Bonjour |
2004-02-11
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Issues with boot time KEXT loading
(HTML)
()
QA1087: Explains how to solve problems with loading KEXTs at boot time.
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ATA, Bluetooth, Ethernet, FireWire, Human Interface Device & Force Feedback, Networking, PCI and PC Card, SCSI, Serial, USB |
2004-01-15
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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.
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AirPort/802.11, Apple Hardware, ATA, Audio, Bluetooth, Ethernet, Fibre Channel, FireWire, Human Interface Device & Force Feedback, Mac OS X Server, Networking, PCI and PC Card, Performance, QuickTime, SCSI, Serial, Storage, USB |
2003-10-28
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Bonjour TXT record rate limiting in Panther
(HTML)
QA1293: Explains how mDNSResponder implements TXT record rate limiting in Panther.
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Bonjour |
2003-10-23
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Registering a Bonjour service multiple times
(HTML)
QA1311: Explains why registering the same Bonjour service twice on the same machine doesn't cause a name conflict.
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Bonjour, Networking |
2003-10-23
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Sleep vs. Doze on Mac OS X
(HTML)
QA1309: Discusses and demonstrates sleep versus doze detection on Machintosh Mac OS X
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Apple Hardware, PCI and PC Card, Performance |
2003-10-09
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PCI/PCI-X slots on the Power Mac G5
(HTML)
QA1307: Discusses installing PCI/PCI-X cards of different speeds in the Power Mac G5.
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PCI and PC Card |
2003-09-30
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How can I tell if a PCI device has on board I/O space?
(HTML)
QA1287: Demonstrates "how to" tell if a PCI device has on board I/O space.
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PCI and PC Card, Performance |
2003-09-24
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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 .
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Apple Hardware, Human Interface Device & Force Feedback, Performance, Storage, USB |
2003-08-21
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Bluetooth Radio Power Class for Apple Systems
(HTML)
()
QA1278: Notes Preferred Bluetooth Transmitter Characteristics for products designed for Apple Systems.
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Apple Hardware, Bluetooth, Performance |
2003-08-06
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DRAM DIMM power pin connections for Macintosh Computers
(HTML)
()
QA1271: Discusses design considerations for DRAM DIMM power pin connections for Macintosh Computers.
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Apple Hardware, Performance |
2003-07-04
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Power adapter Sensing for the 17" PowerBook
(HTML)
()
QA1266: Details Design and detection considerations for 17-inch PowerBook power adapters
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Apple Hardware, Performance |
2003-06-12
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Empty Memory Objects
(HTML)
()
QA1259: Describes how two memory management edge cases are handled by the common Mac OS memory allocators.
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Apple Hardware, Performance |
2003-04-21
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Why does logging keep my Printer Module from working?
(HTML)
()
Deprecated - QA1182: Describes some problems with standard printf logging in a Printer Module on Jaguar.
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Printing |
2002-11-06
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Why don't all of my PDE localizations show up in all applications?
(HTML)
()
QA1185: Explains why some PDE localizations might not appear in all applications.
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Printing |
2002-10-16
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Faster DDR DRAM in the 867MHz Power Mac G4 (Mirrored Drive Doors)
(HTML)
()
QA1191: Confirms the use of faster DDR DRAM in the 867MHz Power Mac G4 (Mirrored Drive Doors).
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Apple Hardware, Performance |
2002-08-19
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Workaround for Asynchronous SCSIAction Crashes
(HTML)
()
Deprecated - QA1129: Explains how to workaround asynchronous SCSIAction crashes on Mac OS X.
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SCSI |
2002-03-21
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PC100 SDRAM DIMMs on the Flat Panel iMac
(HTML)
()
QA1130: Describes PC100 SDRAM DIMM limitations on the "original " Flat Panel iMac.
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Apple Hardware, Performance |
2002-03-18
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IOLog and Interrupt Context
(HTML)
()
QA1100: Describes when IOKit runs at primary (hardware) interrupt context.
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PCI and PC Card |
2002-02-13
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Power Management; Policy Maker vs. Power Controller
(HTML)
()
QA1121: Describes the differences between a Power Management Policy Maker and a Power Management Power Controller.
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AirPort/802.11, Apple Hardware, ATA, Audio, Bluetooth, Ethernet, Fibre Channel, FireWire, Human Interface Device & Force Feedback, Networking, PCI and PC Card, Printing, Scanners, SCSI, Serial, Still Cameras, Storage, USB |
2002-02-13
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Working with Configuration Variables
(HTML)
()
QA1119: Explains how to delete a specific Open Firmware configuration variable without using Command-Option-P-R.
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Apple Hardware, PCI and PC Card |
2002-02-13
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Making sense of IOKit error codes
(HTML)
()
QA1075: Explains how to interpret I/O Kit error codes.
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ATA, Bluetooth, Ethernet, FireWire, Networking, PCI and PC Card, SCSI, Serial, USB |
2002-02-07
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Energy Star PCI Device
(HTML)
()
QA1108: Provides useful information for developers of Energy Star-compliant PCI devices.
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Apple Hardware, PCI and PC Card, Performance |
2002-01-15
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IOKit Framework Headers
(HTML)
()
QA1107: Describes the differences between the headers in IOKit.framework and the I/O Kit headers in Kernel.framework.
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AirPort/802.11, Apple Hardware, ATA, Audio, Bluetooth, Ethernet, Fibre Channel, FireWire, Human Interface Device & Force Feedback, Mac OS X Server, Networking, PCI and PC Card, Performance, Printing, QuickTime, Scanners, SCSI, Serial, Still Cameras, Storage, USB |
2002-01-15
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Menu Bar Clock and NVRAM
(HTML)
QA1102: Explains why booting with the Command-Option-P-R keys doesn't reset date and time preferences.
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Apple Hardware, Performance |
2001-12-21
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Resetting NVRAM to factory defaults
(HTML)
QA1103: Describes what happens when you boot holding the Command-Option-P-R keys.
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Apple Hardware, Performance |
2001-12-21
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Reducing the size of Physical Memory in Open Firmware
(HTML)
QA1099: Describes how to configure the Power Macintosh so less memory is recognized than is actually present.
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Apple Hardware |
2001-12-20
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The dreaded "incompatible flag -framework" error
(HTML)
QA1096: Explains how to eliminate the incompatible flag -framework error in Project Builder.
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ATA, Ethernet, Fibre Channel, FireWire, Networking, PCI and PC Card, SCSI, Serial, Storage, USB |
2001-12-05
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Avoiding Kernel Event Conflicts
(HTML)
QA1063: Documents the namespace for the vendor_code field of the kern_event_msg structure.
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PCI and PC Card |
2001-09-14
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SDRAM, CAS Latency for the
(HTML)
QA1071: Describes the supported CAS Latency values for the "QuickSilver", PowerMac G4 CPUs.
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Apple Hardware, Performance |
2001-09-13
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Determining RAM size & location in New World Machines
(HTML)
QA1065: Demonstrates Open Firmware method of determining RAM size & location in New World Machines.
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Apple Hardware, Performance |
2001-08-01
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Serial API Choice
(HTML)
DV39: Discusses the choice of serial APIs supported by traditional Mac OS and Mac OS X.
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Serial |
2001-07-02
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128Mb SDRAM ICs limitation on original "Bronze Keyboard" Powerbook G3
(HTML)
QA1040: Outlines Memory ICs design limitation on original "Bronze Keyboard" Powerbook G3.
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Apple Hardware |
2001-06-21
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HID Manager Event Data Underruns
(HTML)
QA1038: Explains how to correctly handle HID Manager event queue data underruns.
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Human Interface Device & Force Feedback, USB |
2001-06-13
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Displaying PCI Configuration Registers contents in Open Firmware
(HTML)
QA1036: Demonstrates how to display PCI Configuration Resister contents in Open Firmware.
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Apple Hardware, PCI and PC Card, Performance |
2001-05-18
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Determining Open Firmware version
(HTML)
HW100: Demonstrates how to find out the version of Open Firmware on your Macintosh.
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Open Firmware, PCI and PC Card |
2000-10-06
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Was that a path I just saw?
(HTML)
HW101: Describes the Open Firmware path that is occasionally shown at boot time.
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Open Firmware, PCI and PC Card |
2000-10-06
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What is an Open Firmware devalias?
(HTML)
HW99: Describes devaliases in Open Firmware.
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Open Firmware, PCI and PC Card |
2000-10-06
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Open Firmware Memory bus speed
(HTML)
HW97: Describes a method to display memory bus speed for G3 or G4 Macintosh in Open Firmware.
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Apple Hardware, PCI and PC Card |
2000-09-22
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Open Firmware version number
(HTML)
HW96: Discusses the unique values of Open Firmware version numbers.
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Apple Hardware, Performance |
2000-09-22
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The "/aliases" node in the device tree
(HTML)
HW89: Describes the aliases node in the Open Firmware device tree.
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Open Firmware, PCI and PC Card |
2000-09-05
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The "chosen" node in the device tree
(HTML)
HW88: Describes how to find the "chosen" node in the Open firmware device tree.
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Apple Hardware, Ethernet, Networking, PCI and PC Card |
2000-09-05
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The "green" PCI bus
(HTML)
HW93: Explains why the PCI bus is considered "green".
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Apple Hardware, PCI and PC Card |
2000-09-05
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How many PCI header types exist today?
(HTML)
HW92: Briefly describes the three PCI header types defined in the PCI 2.2 specification.
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PCI and PC Card |
2000-09-05
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Open Firmware device tree nodes
(HTML)
HW86: Explains the usage of the "@n" notation in Open Firmware device tree nodes.
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Apple Hardware, PCI and PC Card |
2000-09-05
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PCI address/data stepping
(HTML)
HW94: Explains that Apple does not support PCI address/data stepping.
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PCI and PC Card |
2000-09-05
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PCI class codes
(HTML)
HW91: Explains why PCI class codes are important.
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Apple Hardware, PCI and PC Card, Performance |
2000-09-05
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PCI Macintoshes and CardBus controllers
(HTML)
HW87: Explains why older PCI Macintoshes do not recognize a Cardbus controller.
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Apple Hardware, PCI and PC Card, Performance |
2000-09-05
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Locating the 1275-1994 Standard Document
(HTML)
HW85: Alerts that the Open Firmware (IEEE 1275-1994) document can't be found at the IEEE Standards Association site.
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Open Firmware, PCI and PC Card |
2000-07-17
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Checking for the Printer Driver
(HTML)
Deprecated - DV42: Describes a legacy Mac OS technique avoiding system hangs when using serial drivers on USB systems.
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Printing |
2000-06-19
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Legacy Devices
(HTML)
HW84: Discusses why legacy devices with hard-wired I/O addresses may not work properly with Open Firmware.
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ATA, PCI and PC Card, QuickTime, Storage |
2000-03-20
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Maximum Memory for the "Firewire" PowerBook
(HTML)
Deprecated - HW83: Discrepancies between PowerBook Developer Note and TIL articles 14870 and 58582, regarding maximum memory configurations.
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Apple Hardware |
2000-03-13
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A SCSI little secret
(HTML)
HW81: Details what to expect when accessing the motherboard SCSI bus on the Blue & White G3.
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Apple Hardware, Performance, SCSI, Storage |
1999-12-20
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PCI Header types
(HTML)
HW78: Describes the three required types of PCI headers to be provided in its configuration header space.
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Apple Hardware, PCI and PC Card, Performance |
1999-11-15
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What is a CardBus host bus adapter HBA?
(HTML)
HW79: Explains what a CardBus host bus adapter (HBA) is and discusses its implementation on the Macintosh.
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PCI and PC Card |
1999-11-15
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What is an Open Firmware phandle, and why can't I access it from the Mac OS?
(HTML)
HW76: Explains an "Open Firmware phandle" and why it is inaccessible from the Mac OS.
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Open Firmware, PCI and PC Card |
1999-11-15
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When to use PCMCIA, PC Card, and CardBus
(HTML)
HW77: Explains the differences between PCMCIA, PC Card, and CardBus.
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PCI and PC Card |
1999-11-15
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Explanation of SDRAM configuration Nomenclature
(HTML)
HW75: Explains the three-part "Device configuration" numbers for SDRAM in the Power Mac G4 Computer Developer Note.
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Apple Hardware, Performance |
1999-10-18
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Are the Name Registry device tree nodes unique?
(HTML)
Deprecated - HW64: Discusses whether Name Registry nodes copied from the Open Firmware device tree are unique.
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Apple Hardware, Audio, Networking, Open Firmware, PCI and PC Card, Printing |
1999-10-11
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Can you explain the words "begin" and "again"?
(HTML)
HW70: Explains the Forth looping words "begin" and "again" and how to escape such a loop.
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Open Firmware, PCI and PC Card |
1999-10-11
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How do I change the numeric base for the Open Firmware user interface?
(HTML)
HW66: Explains how to change the numeric base for the Open Firmware user interface.
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Apple Hardware, Performance |
1999-10-11
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How do I determine the top of the Open Firmware dictionary?
(HTML)
HW69: Explains how to determine the top of the Open Firmware dictionary.
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Apple Hardware, Performance |
1999-10-11
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Using "words" in Open Firmware
(HTML)
HW73: Explains how to search for specific entries within all the global and local Open Firmware words.
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Open Firmware, PCI and PC Card |
1999-10-11
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What is the return stack in Open Firmware and can I use it?
(HTML)
HW67: Describes the purpose of the Open Firmware return stack and how developers can use it.
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Open Firmware, PCI and PC Card |
1999-10-11
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What is the word "see" and how do I use it to help me find what a word does?
(HTML)
HW72: Explains the function and use of the Open Firmware word "see".
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Apple Hardware, Performance |
1999-10-11
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Detecting specific ROM-in-RAM Mac
(HTML)
()
Deprecated - HW49: Identifying a Mac by name ("iMac"), and better alternatives for determining specific features ("has Firewire").
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Apple Hardware |
1999-10-05
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Which Machines Support Driver Services Library and the MP Nanokernel?
(HTML)
()
HW63: Lists the systems that do and don't support the Driver Services Library and the MP Nanokernel.
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Apple Hardware, Performance, Storage |
1999-07-12
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Use the Doorbell
(HTML)
()
Deprecated - FW01: Explains the function of the FireWire Serial Bus Protocol 2 (SBP2) doorbell.
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FireWire |
1999-05-17
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What is unsolicited status?
(HTML)
()
FW03: Explains the meaning and usage of the SBP-2 unsolicited status message.
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FireWire |
1999-05-17
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TCP/IP Option Sizes
(HTML)
()
NW62: Enumerates the TCP/IP options and their sizes for Open Transport.
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Networking |
1999-04-26
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The AAPL, slot-name property and PCI
(HTML)
()
HW61: Discusses the use of the AAPL,slot name property for PCI
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Apple Hardware, Open Firmware, PCI and PC Card |
1999-04-19
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Determining the version of Open Firmware on your Mac
(HTML)
()
HW60: Describes a method to display the version of Open Firmware on a Macintosh.
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Apple Hardware, Performance |
1999-03-29
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dl command in 1 machine mode
(HTML)
()
HW51: Describes using the "dl" command in 1 machine mode.
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Apple Hardware |
1999-03-29
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PCI SIG
(HTML)
()
HW55: Describes the meaning of the acronym PCI SIG.
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PCI and PC Card |
1999-03-29
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