For x86 encodings, there’s also http://ref.x86asm.net/index.html http://ref.x86asm.net/index.html and of course the venerable https://sandpile.org/ https://sand

For x86 encodings, there’s also http://ref.x86asm.net/index.html http://ref.x86asm.net/index.html and of course the venerable https://sandpile.org/ https://sandpile.org/.