Category Archives: isa

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 …read more

Continue reading

Posted in cpu, instruction set architecture, intel, isa, software hacks, undocumented, undocumented instructions, x86 | Leave a comment