It's not 4.3BSD, but might be worth an honorable mention... You can get FreeBSD 1.0, (based on 386BSD, based on NET/2), directly from the FreeBSD project: http://ftp-archive.freebsd.org/pub/FreeBSD-Archive/old-releases/i386/ISO-IMAGES/1.0/1.0-disc1.iso And then use 86Box ( https://github.com/86Box/86Box/ ) to emulate an early 90's 486 and install it with FreeDOS on one partition, FreeBSD on the other.  There's an /sbin/mount_isofs but I haven't stumbled across a working combination that manages to actually see a cdrom yet. As a work-around I copied everything from the "tarballs" directory onto the freedos partition and then installed them from there. It would probably work on Virtualbox, but I haven't tried. Have fun! On 8/28/2018 6:53 AM, Gilles Gravier wrote: > Hi! > > If I wanted to run 4.3BSD on an x86 box (VirtualBox? QEMM? other > emu?)... anybody has suggestions? Where can I find media for 4.3BSD > (if any are legitimately accessible)? > > Or on a Raspberry Pi? :) > > Thanks! > > Gilles > > -- > /*Gilles Gravier*/ - Gilles@Gravier.org > GSM : +33618347147 and +41794728437 > Skype : ggravier| PGP Key: 0x8DE6D026 >