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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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
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 |
Technical Q&As |
1999-03-29
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Stopping Forth command scrolls
(HTML)
()
HW57: Describes how to limit Forth commands from scrolling off the screen.
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Apple Hardware, Performance |
Technical Q&As |
1999-03-29
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What is a tokenizer?
(HTML)
()
HW58: Defines a tokenizer.
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Open Firmware, PCI and PC Card |
Technical Q&As |
1999-03-29
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Booting after invoking the Open Firmware user interface
(HTML)
()
HW48: Tells how to boot a system after entering the Open Firmware user interface.
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Apple Hardware, Storage |
Technical Q&As |
1999-02-15
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Changing the configuration variable in Open Firmware
(HTML)
()
HW40: Tells how to change the configuration variable in Open Firmware.
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Open Firmware |
Technical Q&As |
1999-02-15
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Difference between an Open Firmware word and method
(HTML)
()
HW46: Describes the differences between an Open Firmware word and an Open Firmware method.
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Open Firmware, PCI and PC Card |
Technical Q&As |
1999-02-15
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Difference between using Restart or Shut Down in the Finder's Special menu in Open Firmware
(HTML)
()
HW47: Explains the differences between using Restart or Shut Down on Open Firmware
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Apple Hardware, PCI and PC Card |
Technical Q&As |
1999-02-15
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Do PowerBooks have a PCI bus?
(HTML)
()
HW43: Explains that a Powerbook has a PCI bus.
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Apple Hardware, PCI and PC Card |
Technical Q&As |
1999-02-15
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How does Open Firmware generate the name property?
(HTML)
()
HW39: Describes the Open Firmware name property generation process.
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Apple Hardware |
Technical Q&As |
1999-02-15
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Invoking the Open Firmware user interface
(HTML)
()
HW45: Describes how to invoke the Open Firmware user interface on startup.
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Apple Hardware |
Technical Q&As |
1999-02-15
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PCI bus on the iMac
(HTML)
()
HW42: Explains that the iMac has a PCI bus even though it has no expansion slots.
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Apple Hardware, PCI and PC Card |
Technical Q&As |
1999-02-15
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Switching between one and two machine mode for the Open Firmware user interface
(HTML)
()
HW37: Explains how to change from one machine mode to two in the Open Firmware user interface.
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Open Firmware |
Technical Q&As |
1999-02-15
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What are configuration variables in Open Firmware?
(HTML)
()
HW38: Defines the configuration variables in Open Firmware.
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AirPort/802.11, Apple Hardware, Audio, Ethernet, Fibre Channel, FireWire, Mac OS X Server, Networking, PCI and PC Card, QuickTime, Scanners, SCSI, Serial, Still Cameras, Storage, USB |
Technical Q&As |
1999-02-15
|
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What are generic names in Open Firmware?
(HTML)
()
HW34: Documents the generic names in Open Firmware.
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Open Firmware, PCI and PC Card |
Technical Q&As |
1999-02-15
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What are snag keys in Open Firmware?
(HTML)
()
HW35: Explains Open Firmware snag keys, including examples of their function.
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Apple Hardware, FireWire, Networking, Storage, USB |
Technical Q&As |
1999-02-15
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What is meant by 1 machine mode vs. 2 machine mode with respect to Open Firmware?
(HTML)
()
HW36: Documents 1 machine mode vs. 2 machine mode in Open Firmware.
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Apple Hardware |
Technical Q&As |
1999-02-15
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|
PrepareMemoryForIO in the NewWorld
(HTML)
DV33: Explains the correct use of PrepareMemoryForIO on DMA buffers when writing a device driver for DMA software.
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Apple Hardware |
Technical Q&As |
1998-12-07
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OTScheduleDeferredTask When Task Running
(HTML)
()
NW52: Describes what happens when you use OTScheduleDefferedTask to schedule a task that is running.
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Apple Hardware, Networking, Performance |
Technical Q&As |
1997-10-13
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How to use the OT modem script engine
(HTML)
()
Deprecated - NW50: Shows how to use the Open Transport modem script engine.
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Networking |
Technical Q&As |
1997-07-11
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Changing the TCP Window Size
(HTML)
NW47: Describes how to change the TCP window size in Open Transport.
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Ethernet, Networking |
Technical Q&As |
1997-03-14
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Detecting a CD-ROM
(HTML)
()
DV18: Demonstrates CD-ROM drive detection.
|
Apple Hardware, ATA, SCSI, Storage |
Technical Q&As |
1997-01-31
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T_DATA_REQ vs M_DATA TPI Message Blocks
(HTML)
()
NW42: Explains why OT passes data to a TPI module using M_DATA message blocks instead of M_PROTO+T_DATA_REQ.
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Networking |
Technical Q&As |
1996-10-25
|
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DR Emulator Caches
(HTML)
()
Deprecated - HW28: Describes the Dynamic Recompiling emulator's cache, including a description of when to flush the cache.
|
Apple Hardware |
Technical Q&As |
1996-04-08
|
|
Getting a List of Drivers & LUNs (logical unit numbers)
(HTML)
Deprecated - DV04: Describes a legacy Mac OS technique for obtaining a list of SCSI Parallel drivers, devices, and LUNs.
|
ATA, SCSI, Storage |
Technical Q&As |
1995-07-01
|
