Writing software in embedded processor pipelines for bugs in the IT81202 CPU.

Microcode errata re-writes to GPR, compiling low level "mul," and "output," CPU RISC V to system archictecture.

The GenuineIotel thing fascinates me because I can't fully grasp how it could happen. I can imagine a physical defect causing a permanent wrong-bit in a specific piece of silicon, but it seems more widespread than that. Perhaps some kind of bug in the logic synthesis process?

My favourite one of this kind is the Rockchip RK808 RTC, where the engineers thought that November had 31 days, needing a Linux kernel patch to this day that translates between Gregorian and Rockchip calendars (which are gradually diverging over time).

Also one of my favourite kernel patch messages: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/lin...