Excellent work. Thank you! Your 486 FPGA project looks pretty neat too.

No discussion of these instructions on the 386 would be complete without mentioning that early revisions had a bug in the 32-bit multiply: https://retrocomputing.stackexchange.com/questions/17803/int...

I wonder if anyone outside of Intel has discovered the actual bug in the circuitry yet.

Is there a rational explanation on why there seems to be a HN article answering the weirdest questions i had in my mind just a few days ago ? Only yesterday i wondered how did CPU performed division. I didn't ask or type anything about it. It was just in my mind. And now this.

Are we part of a collective mind ? Do social networks algorithms shape society that deeply that we all end up having about the same random thoughts ?

This is really scary in a way.

The 80186 and NEC chips could already do mul/div in one cycle per bit (+ some overhead for the microcode). What they didn't have was the early-out optimization.

>This wasn't just an incremental upgrade—it was the foundation that would carry the PC architecture for decades to come.

AI?