Install QEMU

sudo apt-get install qemu-kvm qemu virt-manager virt-viewer libvirt-bin

Source

PCI Passthrough

https://blog.zerosector.io/2018/07/28/kvm-qemu-windows-10-gpu-passthrough/

Linux Find Out If CPU Support Intel VT/AMD-V Virtualization For KVM

How to assign devices with VT-d in KVM

Install NT4 in QEMU

http://computernewb.com/wiki/How_to_install_Windows_NT_4.0_in_QEMU

qemu-img create -f qcow2 winnt4.img 700M

qemu-system-i386 -hda winnt4.img -cdrom winnt4_iso_name.iso -boot d -cpu pentium -m 128 -vga cirrus -net nic,model=pcnet -net user -localtime

After installation

qemu-system-i386 -hda winnt4.img -boot c -cpu pentium -m 128 -vga cirrus -net nic,model=pcnet -net user -localtime

YouTube: https://youtu.be/gOcpInGVFLk

Processor: Pentium

NIC: pcnet(not in the list)

Video: Cirrus

Adding a Floppy Device with Virtual Machine Manager

Currently KVM only supports the use of floppy disk images—using a physical floppy drive is not supported. Create a floppy disk image from an existing floppy using dd:

dd if=/dev/fd0 of=/var/lib/libvirt/images/floppy.img

To create an empty floppy disk image use one of the following commands:

Raw Image

dd if=/dev/zero of=/var/lib/libvirt/images/floppy.img bs=512 count=2880

FAT Formatted Image

mkfs.msdos -C /var/lib/libvirt/images/floppy.img 1440

To add a floppy device to your VM Guest proceed as follows:

Double-click a VM Guest entry in the Virtual Machine Manager to open its console and switch to the Details view with View > Details.
Click Add Hardware and choose Storage in the pop-up window. Proceed with Forward.
Change the Device Type to Floppy Disk.
Choose Select Managed or Other Existing Storage and click Browse to choose an existing image from a storage pool. If Virtual Machine Manager was started on the VM Host Server, you may alternatively choose an image from another location on the file system by clicking Browse Local. Select an image and close the file browser with Choose Volume.
Proceed with Forward to review the settings. Apply them with Finish, Yes, and Apply.
Reboot the VM Guest to make the new device available. For further information also see Section 10.4, Ejecting and Changing Floppy or CD/DVD-ROM Media with Virtual Machine Manager.