The 80186 was an 8086 integrated with some of the peripheral chips mainly used in embedded devices. You can still get some SBCs with 8018 compatible chips.
For some time 80186 was quite common in SCSI devices. I've seen large amounts of 5.25" (and larger) SCSI harddrives with 80186 and IIRC some RS/6000 workstations had 80186 in their SCSI controller (on MCA card).
It is one of the saner Intel's attempts at x86-compatible embedded CPU with integrated peripherals.
It is one of the saner Intel's attempts at x86-compatible embedded CPU with integrated peripherals.