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© Amit Singh. All Rights Reserved. Written in March 2006 Background The Extensible Firmware Interface (EFI) can be traced back to 1998 to the Intel Boot Initiative (IBI) program. The EFI specification, which was developed and maintained by a consortium of companies (including Intel and Microsoft), defines a set of APIs and data structures to be exported by a system's firmware, and to be used by a
© Amit Singh. All Rights Reserved. Written in May 2006 Introduction Beginning with the x86 version of Mac OS X, Apple removed the /dev/mem and /dev/kmem devices from the system—for reasons that might include interface cleanliness, portability across system versions, security, and perhaps even a bit of obscurity. Consequently, programs that use these devices for directly accessing kernel memory wil
© Amit Singh. All Rights Reserved. Written in December 2007 Beating a Dead Horse Apple began shipping x86-based Macintosh computers in early 2006. Even before that, people had noted the presence of a Trusted Platform Module (TPM) in the prerelease Developer Transition Kit machines. There had been much talk and much furor about the system-wide "DRM" the TPM would enforce. However, the x86-based Mac
Introduction Although Mac OS X is a relatively new operating system, its lineage is rather colorful, and the history of most of its components is much older. Mac OS X, and Apple in general, have attracted a lot of attention in recent years. Given Apple's "cult-like" status, and the unique cultural and technical composition of Mac OS X, it is not surprising that people with vastly different backgro
© Amit Singh. All Rights Reserved. Written in June 2006 In February 2005, I wrote about using the sudden motion sensor in Apple notebook computers. The article sparked enough interest that I was compelled to follow up with the AMS2HID application that allowed motion sensor readings to be translated to key-presses and mouse movements. Consequently, the motion sensor could be "used with" arbitrary a
The Apple Motion Sensor As A Human Interface Device © Amit Singh. All Rights Reserved. Written in March 2005 Background I first described the working of Apple's Sudden Motion Sensor (SMS, also known as AMS — in this chapter, we will use "SMS" and "AMS" as interchangeable terms and prefixes), initially a feature of the PowerBook line of computers, in "The Sudden Motion Sensor". My original reason f
SMSRotateD is a demonstration application that triggers screen rotation based on the orientation data it retrieves from the Sudden Motion Sensor (SMS) built into newer Apple notebook models. It uses the SMS to detect if the notebook has been physically rotated sufficiently (where "sufficient" is defined as a preconfigured threshold) in such a manner that the display's orientation has changed from
© Amit Singh. All Rights Reserved. Introduction AMSTracker is a command-line program that retrieves acceleration data from the Sudden Motion Sensor in Apple notebook computers. For details of AMSTracker, please refer to "The Sudden Motion Sensor".
© Amit Singh. All Rights Reserved. Written in January 2006 Introduction Certain Apple computers, such as the x86-based iMac and the MacBook Pro, ship with an infrared remote control that is used to control the Front Row media application. iremoted is a command-line program that listens for button-press events and prints the identifier (the HID element cookie, to be precise) of the button in questi
Written on February 21, 2006 Recap I reported yesterday that we (my friends Mark A. Smith and Benjamin Reed, and myself) had a full-fledged customized version of Knoppix running on the Intel-based Macintosh. Earlier, we had Linux booting on the Intel-based Macintosh, as reported here. Windows XP on the Intel-based Macintosh: A Virtualized Possibility We now have Windows XP running on the Intel-bas
Written on February 20, 2006 Recap I reported a few days ago that we (my friends Mark A. Smith and Benjamin Reed, and myself) had Linux booting on the Intel-based Macintosh. We also released a test-drive mini-distribution that can be trivially booted by anybody interested. We have been looking at Linux on this hardware some more, and we are glad to report that we now have a full-fledged Knoppix di
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