@zaitcev @niconiconi @Moon R500 also used SBus, as they tell. But R1000 and forward uses PCI, and their southbridge. I recently got my hands on their SPARC port of Linux and the bootloader, trying to implement emulation for it in QEMU, it has nothing about SBus anymore.

>And the final one (11M?) was a MIPS made in Zelenograd
I wonder if 11M was a KOMDIV related thing.