30 Jul '17, 8pm

Find Instructions Hidden In Your CPU

There was a time when owning computer meant you probably knew most or all of the instructions it could execute. Your modern PC, though, has a lot of instructions, many of them meant for specialized operating system, encryption, or digital signal processing features. There are known undocumented instructions in a lot of x86-class CPUs, too. What’s more, these days your x86 CPU might really be a virtual machine running on a different processor, or your CPU could have a defect or a bug. Maybe you want to run sandsifter –a program that searches for erroneous or undocumented instructions. Who knows what is lurking in your CPU? If you don’t think your CPU has a lot of instructions in it, have a look at the list of what’s inside a modern Intel chip and compare it to the relatively tiny list of the original 8086 instruction set (which is still in there, too). According to the proj...

Full article: https://hackaday.com/2017/07/30/find-instructions-hidden-...

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Find Instructions Hidden In Your CPU

hackaday.com 30 Jul '17, 8pm

There was a time when owning computer meant you probably knew most or all of the instructions it could execute. Your moder...

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