on a bog standard 25Mhz 030 (33Mhz 882) A4000/030 (16MB mobo fast)
managed to install DOS6.22, and windows 3.11 on PC-Task. i remember being impressed enough that it could do it, even if with the screen refresh all it was good for was running the clock. chuffed it worked though.
rumor has it that someone has had a windows95 install on PCx.
on a PPC040/CV powered A1200, managed to run Mario64. i remember sitting there in stark amazement watching this thing run. ok so the frame rate was pretty poor. but it worked.
none of the other N64 games i had ran, so i figured it was mainly proof of concept. still very cool.
on an A4000T/PPC060, running fusion 3.2, ran MacOS8 for netscape and msoffice. i seem to remember these days, that last time i tried to do an install, i was annoyed i've got the 3.1 floppies, but i can't find the 3.2 update any more.