18年ほど前のPCを引っ張り出してFreeBSDをぶっこんでみたけどちゃんと動く
処理は遅いしUSBメモリのマウントすら5秒は待たされる
でもなんか面白かった

---<<BOOT>>---
Copyright (c) 1992-2019 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 12.1-RELEASE r354233 GENERIC i386
FreeBSD clang version 8.0.1 (tags/RELEASE_801/final 366581) (based on LLVM 8.0.1)
VT(vga): resolution 640x480
CPU: VIA Samuel 2 (533.36-MHz 686-class CPU)
Origin="CentaurHauls" Id=0x673 Family=0x6 Model=0x7 Stepping=3
Features=0x803035<FPU,DE,TSC,MSR,MTRR,PGE,MMX>
AMD Features=0x80000000<3DNow!>
real memory = 268435456 (256 MB)
avail memory = 217001984 (206 MB)
random: unblocking device.
Timecounter "TSC" frequency 533364019 Hz quality 800
random: entropy device external interface
....