Low-level programming language used to send instructions (machine code) directly to a microprocessor. For assembling hardware, use [computer-building] instead.

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Is there any way to see what my CPU is doing at the “assembly level”?

I was looking at how Assembly Language works, because I want to learn how the complex and fancy things my computer does actually happen at the CPU register/hardware levels. Is there any way to see ...
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How prevalent are old x64 processors lacking the cmpxchg16b instruction?

The cmpxchg16b instruction for doing atomic 128 bit memory exchanges is not supported on old versions of the x64 processor but it seems like this has been supported by newer versions of the processor ...