Installing FreeBSD on PC with 12Mb of RAM - sergeylukin/dotfiles GitHub Wiki
Just for reference, there are following OSes that should be working on 12mb of RAM: http://kolibrios.org, http://menuetos.net/, http://www.minix3.org/
All handbooks can be found here: http://docs.freebsd.org/doc/ Old releases of FreeBSD can be downloaded here: http://ftp-archive.freebsd.org/pub/FreeBSD-Archive/old-releases/
Writing .flp files to floppy disks can be done from Windows using fdimage.exe that can be downloaded here: ftp://ftp.freebsd.org/pub/FreeBSD/tools/
For example, in order to write image kern.flp to Floppy Drive A, execute following:
fdimage floppies\kern.flp A: