An anonymous reader writes: With the release of the iPad, and more specifically, its use of the new ARM-based A4 CPU, a lot of questions are being asked about x86 and ARM, and where they're used. NeoSmart Technologies takes a lengthy look at the underlying architecture of the iPad, Apple's rumored purchase of Intrinsity, and explains the differences between the CISC x86 and the RISC ARM/PPC architectures. Incredibly informative, and easy to understand even if it's all new stuff.
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