I don't think these machines achieved much popularity in China either, as standard PCs were far more common and compatible with the existing software base.

the keyboard and trackpad are internally PS/2.

Interesting that the PC influence is still there, although I'm pretty sure a MIPS doesn't have them on port 60h/64h, or indeed any I/O ports. I remember having a similar moment of surprise when I played around with an ARM VM and discovered it had a "VGA-compatible" GPU emulating an old ISA-class chip.

A decade’s worth of SGI machines combined MIPS processors with PS/2 keyboard and mouse ports.

(author) My understanding is that they're wired into the AMD southbridge which provides them over memory mapped I/O.