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Generating an NMI Without a Programmer's Switch
(HTML)
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QA1264: Explains how to generate a non-maskable interrupt (NMI) on CPUs without programmer's switches.
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2004-04-26 |
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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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2004-03-18 |
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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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2003-10-28 |
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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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2003-10-09 |
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SDRAM Problems With Self-Powered USB Devices
(HTML)
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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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2003-08-21 |
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Bluetooth Radio Power Class for Apple Systems
(HTML)
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QA1278: Notes Preferred Bluetooth Transmitter Characteristics for products designed for Apple Systems.
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2003-08-06 |
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DRAM DIMM power pin connections for Macintosh Computers
(HTML)
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QA1271: Discusses design considerations for DRAM DIMM power pin connections for Macintosh Computers.
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2003-07-04 |
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Power adapter Sensing for the 17" PowerBook
(HTML)
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QA1266: Details Design and detection considerations for 17-inch PowerBook power adapters
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2003-06-12 |
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Empty Memory Objects
(HTML)
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QA1259: Describes how two memory management edge cases are handled by the common Mac OS memory allocators.
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2003-04-21 |
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Programmatically causing restart, shutdown and/or logout
(HTML)
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QA1134: Describes how to programmatically cause restart, shutdown, sleep or logout.
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2003-02-10 |
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Faster DDR DRAM in the 867MHz Power Mac G4 (Mirrored Drive Doors)
(HTML)
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QA1191: Confirms the use of faster DDR DRAM in the 867MHz Power Mac G4 (Mirrored Drive Doors).
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2002-08-19 |
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Disabling a Processor on a Multiprocessor System
(HTML)
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QA1141: Describes how to disable a processor on a multiprocessor system for testing purposes.
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2002-05-22 |
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PC100 SDRAM DIMMs on the Flat Panel iMac
(HTML)
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QA1130: Describes PC100 SDRAM DIMM limitations on the "original " Flat Panel iMac.
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2002-03-18 |
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IODeviceTree & the IORegistry
(HTML)
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QA1120: Describes the IODeviceTree plane in the Mac OS X IORegistry.
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2002-02-13 |
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Power Management; Policy Maker vs. Power Controller
(HTML)
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QA1121: Describes the differences between a Power Management Policy Maker and a Power Management Power Controller.
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2002-02-13 |
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Working with Configuration Variables
(HTML)
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QA1119: Explains how to delete a specific Open Firmware configuration variable without using Command-Option-P-R.
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2002-02-13 |
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Energy Star PCI Device
(HTML)
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QA1108: Provides useful information for developers of Energy Star-compliant PCI devices.
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2002-01-15 |
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IOKit Framework Headers
(HTML)
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QA1107: Describes the differences between the headers in IOKit.framework and the I/O Kit headers in Kernel.framework.
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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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2001-12-21 |
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PCI Bus?
(HTML)
QA1104: Answers the question, "Do all Macintosh computers have a PCI bus?"
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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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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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2001-12-20 |
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SDRAM, CAS Latency for the "Quicksilver" PowerMacG4s
(HTML)
QA1071: Describes the supported CAS Latency values for the "QuickSilver", PowerMac G4 CPUs.
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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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2001-08-01 |
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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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2001-06-21 |
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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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2001-05-18 |
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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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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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2000-09-22 |
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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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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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2000-09-05 |
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Open Firmware and the devalias node
(HTML)
HW95: Describes why the contents of the Open Firmware devalias node varies between Macintosh models.
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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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2000-09-05 |
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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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2000-09-05 |
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PCI class codes
(HTML)
HW91: Explains why PCI class codes are important.
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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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2000-09-05 |
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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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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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1999-12-20 |
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Is the Open Firmware device tree object oriented?
(HTML)
HW80: Discusses the object-oriented attributes of the Open Firmware device tree.
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1999-11-15 |
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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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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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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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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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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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1999-10-11 |
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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.
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1999-10-11 |
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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.
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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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1999-10-11 |
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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.
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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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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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1999-07-12 |
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Timely Issues - 1904
(HTML)
()
OPS23: Explains why the beginning of the year 1904 was chosen for epoch of the Time global variable.
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1999-05-17 |
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The AAPL, slot-name property and PCI
(HTML)
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HW61: Discusses the use of the AAPL,slot name property for PCI
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1999-04-19 |
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Determining Open Firmware configuration variables
(HTML)
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HW56: Discusses how to determine the Open Firmware variables on a system.
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1999-03-29 |
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Determining the version of Open Firmware on your Mac
(HTML)
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HW60: Describes a method to display the version of Open Firmware on a Macintosh.
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1999-03-29 |
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dl command in 1 machine mode
(HTML)
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HW51: Describes using the "dl" command in 1 machine mode.
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1999-03-29 |
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Expansion ROM device properties
(HTML)
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HW50: Describes the Open Firmware properties that should be included in a boot device's expansion ROM.
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1999-03-29 |
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Getting started with Forth
(HTML)
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HW53: Describes where FCode driver developers can get information about the Forth programming language.
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1999-03-29 |
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if and then in Forth
(HTML)
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HW54: Using the Forth word "if" requires a "then".
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1999-03-29 |
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Stopping Forth command scrolls
(HTML)
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HW57: Describes how to limit Forth commands from scrolling off the screen.
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1999-03-29 |
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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.
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1999-03-29 |
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Are interrupts enabled while Open Firmware is running?
(HTML)
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HW44: Explains that interrupts are disabled when Open Firmware is running.
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1999-02-15 |
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Booting after invoking the Open Firmware user interface
(HTML)
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HW48: Tells how to boot a system after entering the Open Firmware user interface.
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1999-02-15 |
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Difference between using Restart or Shut Down in the Finder's Special menu in Open Firmware
(HTML)
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HW47: Explains the differences between using Restart or Shut Down on Open Firmware
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1999-02-15 |
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Do PowerBooks have a PCI bus?
(HTML)
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HW43: Explains that a Powerbook has a PCI bus.
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1999-02-15 |
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How does Open Firmware generate the name property?
(HTML)
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HW39: Describes the Open Firmware name property generation process.
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1999-02-15 |
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Invoking the Open Firmware user interface
(HTML)
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HW45: Describes how to invoke the Open Firmware user interface on startup.
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1999-02-15 |
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PCI bus on the iMac
(HTML)
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HW42: Explains that the iMac has a PCI bus even though it has no expansion slots.
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1999-02-15 |
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What are configuration variables in Open Firmware?
(HTML)
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HW38: Defines the configuration variables in Open Firmware.
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1999-02-15 |
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What are snag keys in Open Firmware?
(HTML)
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HW35: Explains Open Firmware snag keys, including examples of their function.
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1999-02-15 |
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What is meant by 1 machine mode verses 2 machine mode with respect to Open Firmware?
(HTML)
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HW36: Documents 1 machine mode vs. 2 machine mode in Open Firmware.
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1999-02-15 |
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OTScheduleDeferredTask When Task Running
(HTML)
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NW52: Describes what happens when you use OTScheduleDefferedTask to schedule a task that is running.
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1997-10-13 |
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Detecting a CD-ROM
(HTML)
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DV18: Demonstrates CD-ROM drive detection.
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1997-01-31 |
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DR Emulator Caches
(HTML)
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Deprecated - HW28: Describes the Dynamic Recompiling emulator's cache, including a description of when to flush the cache.
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1996-04-08 |
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PCI Type 1 Cycles
(HTML)
HW26: Describes the circumstances when the PowerMac generates a Configuration Type 1 command.
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1995-07-15 |
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ANSI SCSI Standards
(HTML)
Deprecated - DV03: Describes past Macintosh systems that did not fully support the ANSI SCSI-1 standard.
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1995-07-01 |
