Hidden deep inside the latest iOS 5.1 beta is updated processing-core management software that not only supports the dual-core processing enabled by the A5 iPhone and iPad chip, but also quad-core processing.



From 9to5 Mac:

Extremely reliable and knowledgeable people familiar with iOS’s inner workings explained to me that core references begin at “0.” For example: A single core device would be limited to ”/cores/core.0,” and a dual-core device would come in at ”/cores/core.1.” A “core.2″ (which is not referenced in iOS code) would be a triple-core processor according to this labeling method. iOS 5.1 beta 2 now includes core.3, a seemingly quad-core chip from Apple. Below, you can view a comparison between the pre-iOS 5.1 beta iOS core management software and the iOS 5.1 beta version. The dual-core A5 chip, on the bottom, has the “core.1,” and the quad-core chip, on top, supporting iOS 5.1 beta is marked with the “core.3.”

  iOS 5.1 beta reveals Apple’s plan to soon ship iPads, iPhones with quad-core chips