[TheOtherHobbes]

XKL's TOAD-2 is/was based on a single chip PDP-10.

The hardware is used as a router, but supposedly if you ask it very nicely you can get it to run TOPS-20.

[pinewurst]

https://commons.wikimedia.org/wiki/File:XKL_TOAD_2.jpg

[p_l]

Living Computer Museum had two XKL-2 running TOPS-20.