#!/bin/sh
fetch http://ftp-archive.freebsd.org/pub/FreeBSD-Archive/old-releases/VM-IMAGES/11.2-RELEASE/amd64/Latest/FreeBSD-11.2-RELEASE-amd64.qcow2.xz
fetch https://qemu.weilnetz.de/w64/2020/qemu-w64-setup-20200201.exe
fetch http://ftp-archive.freebsd.org/pub/FreeBSD-Archive/old-releases/ISO-IMAGES/11.2/FreeBSD-11.2-RELEASE-i386-bootonly.iso.xz
fetch http://ftp-archive.freebsd.org/pub/FreeBSD-Archive/old-releases/ISO-IMAGES/11.2/FreeBSD-11.2-RELEASE-i386-memstick.img.xz
fetch https://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/distributions/1.2/FD12FLOPPY.zip
fetch https://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/distributions/1.2/FD12LGCY.iso

Q: What is QCOW2? 
A: QCOW stands for QEMU copy-on-write. The QCOW2 format decouples the physical storage layer from the virtual layer by adding a mapping between logical and physical blocks

qemu (simulator like virtualbox and is more powerful)
--
windows7 OS: installed qemu-w32-setup-20200201.exe
note: qemu under this dir: /drives/c/Program\ Files\ \(x86\)/qemu/

boot with BSD iso is working as following:
[cpfong.cpfong-PC]->  /drives/c/Program\ Files\ \(x86\)/qemu/qemu-system-x86_64w.exe -cdrom FreeBSD-11.2-RELEASE-i386-bootonly.iso	# working

boot with DOS floppy img as this:
> qemu-system-i386 -fda FreeDOS_FLOPPY.img	# note -hda FAIL, however fda ok

boot i386-mini-memstick.img under mobaxterm
> qemu-system-i386 -hda FreeBSD-11.2-RELEASE-i386-mini-memstick.img