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Computer architecture and hardware hacking
Instruction sets, memory, hardware design, emulation, CPUs, and low-level experimentation.
8,352 stories · 156 in 30 days · Updated Sep 28, 2026
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Why is the x86 undefined instruction called ud2? Why 2?↗ devblogs.microsoft.com · HN · 66 comments · 266 points · Sep 13, 2026
Dropping eBPF CPU Cost by About 90% with Memoization (Not AI Gen)↗ nathannaveen.dev · HN · 29 comments · 155 points · Sep 14, 2026
Microcode in Intel's 8087 floating-point chip: the scale instruction↗ righto.com · HN · 53 comments · 131 points · Sep 12, 2026
Reverse-engineering the Intel 8087's tangent algorithm: more than CORDIC↗ righto.com · HN · 11 comments · 120 points · Sep 26, 2026