this post was submitted on 16 Mar 2024
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It got swallowed by CPUs pretty quickly. On 386 it was a real coprocessor: the 387. On 486 it was a whole CPU that disabled the first CPU. The 487 was just a 486 with floating-point built-in.
But it still checked that you had a genuine Intel 486 installed, or it wouldn't run. Because money.