A photo taken with Night mode on iPhone 17e.
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The x86 protection model is notoriously complex, with four privilege rings, segmentation, paging, call gates, task switches, and virtual 8086 mode. What's interesting from a hardware perspective is how the 386 manages this complexity on a 275,000-transistor budget. The 386 employs a variety of techniques to implement protection: a dedicated PLA for protection checking, a hardware state machine for page table walks, segment and paging caches, and microcode for everything else.
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Lenovo ThinkPad T14 Gen 7 and Lenovo ThinkPad T16 Gen 5 — Two updated business laptops with a 10/10 repairability score from iFixit, a repair guide website. They'll come with Intel Core Ultra Series 3 and AMD Ryzen AI Pro 400 Series processors; ship in Q2 2026 for $1,799 apiece.