Quoting Brian E. Lavender (brian(a)brie.com):
The Debian 386 installer doesn't work? Install to
a hard drive?
I have my old 486 in the closet with Debian installed. I can pull it out
and fire it up!
Funny story: Around 2005, I was visiting my (now-late) father-in-law
in Mammoth Lakes, California -- and mentioned how much in the 1980s
I admired _specifically_ the Macintosh IIci, for how hackable and easy
to work inside that Motorola 68030-based desktop computer was. And he
said "You know, I have one in my basement, and I'd be glad to give it to
you."
So, I ended up driving that wonderful late-1980s computer back to Menlo
Park, where I installed Debian m68k onto it.
For months afterwards, friends would ask me "So, how does it run
Debian?" My answer: "Well, it walks it briskly."
I donated the hardware to the Computer History Museum in Mountain View
-- the local and best-case analogue of your aged pet going "upstate".