Lots of quirky stuff in the same time period. Like the 487. Marketed as a math coprocessor for the 486sx, meaning it was supposedly the same idea as the 387, 2

Lots of quirky stuff in the same time period. Like the 487. Marketed as a math coprocessor for the 486sx, meaning it was supposedly the same idea as the 387, 287, etc. But it wasn't that. It was a full on 486DX that disabled your installed 486SX and took over.