x86 is a fairly uncommon choice in embedded systems, but it does show up occasionally. The DisplayPort to HDMI chip used in some current-generation Apple laptops has an embedded 80186 core, for example.
What you will find all over are 8051-compatible cores. Those show up everywhere, even in some places where you might not have expected to find a microcontroller at all.
What you will find all over are 8051-compatible cores. Those show up everywhere, even in some places where you might not have expected to find a microcontroller at all.