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This reminds me of how people used to use machine code which exposed and tested for slight differences in processors to detect x86 processor versions before CPU

by msla 4y ago

This reminds me of how people used to use machine code which exposed and tested for slight differences in processors to detect x86 processor versions before CPUID: http://www.rcollins.org/ddj/Sep96/Sep96.html http://www.rcollins.org/ddj/Sep96/Sep96.html

lifthrasiir 4y ago
Or feature detection in web development, which made `document.all` an exotic object (ECMAScript speak) in modern browsers [1]. [1] https://tc39.es/ecma262/#sec-IsHTMLDDA-internal-slot https://tc39.es/ecma262/#sec-IsHTMLDDA-internal-slot
kzrdude 4y ago
Interesting! So if we didn't have CPUID we'd have some open source assembler only library called x86_cpu_guesser or so