Running x86_64 Windows 7 on Apple M1 qemu-system-x86_64 
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# Prerequisites on MacOS Big Sur (M1) for building qemu 
# Full Xcode 
# Easiest way to get qemu up is probaly via homebrew, but I don't 
  use it and I rather compile all tools from source myself. 
  What helps is to build the UTM project (qemu) since they include nice 
  helper script to download and compile all the needed software to be able
  to compile qemu from source on Apple M1 Big Sur 
  https://github.com/utmapp/UTM 

# Assuming we have qemu compiled and installed on the Big Sur M1 

Preparing the Virtualization environment for Win7 x86_64 

# Create a working dir for the VM 

mkdir Win7 
cd Win7
qemu-img create -f qcow2 disk.img 20G    (create a qcow2 disk image file) 

# Get Win7 ISO 
# Download drivers.iso (Redhat Virtio Drivers)  

wget http://45.76.81.249/M1-Apple/qemu-x86_64/drivers.iso 
 
# Save the following install.sh script to setup Windows 7  

qemu-system-x86_64 \
-smp 2 \
-cpu core2duo \
-m 2048 \
-drive file=disk.img,if=virtio,cache=none,index=1 \
-drive file=cd.iso,index=2,media=cdrom \
-drive file=drivers.iso,index=3,media=cdrom \
-boot d \
-net nic,model=virtio \
-net user,hostfwd=tcp::3389-:3389 

# run the above install.sh script, Windows installer will complain it does 
  not see any disk drive to install - so choose the secondary CDROM and load 
  the SCSCI virtio drivers from there 
# Once virtio drivers are loaded you should see the virtual HDD disk to install
  Windows to 

# Once installed you can run the simulation via this run.sh script 

qemu-system-x86_64 \
-accel tcg \
-smp 2 \
-cpu core2duo \
-m 2048 \
-device intel-hda -device hda-duplex \
-drive file=disk.img,if=virtio,cache=none,index=1 \
-drive file=drivers.iso,index=3,media=cdrom \
-boot d \
-net nic,model=virtio \
-net user,hostfwd=tcp::3389-:3389 


# For network - make sure to install the Virtio NET drivers again from the 
  drivers.iso CDROM, otherwise network won't work 

# Virtio drivers speed up the whole simulation greatly on the M1 

# For RDP you can use the localhost TCP 3389 port (use Xfreerdp2 to connect to 
  localhost to access the VM if you want that) otherwise the VGA framebuffer is 
  sufficient.    

# For SMP test you can try the run-smp.sh script 

qemu-system-x86_64 \
-accel tcg \
-smp 8,sockets=1,cores=8 \
-cpu core2duo \
-m 2048 \
-device intel-hda -device hda-duplex \
-drive file=disk.img,if=virtio,cache=none,index=1 \
-drive file=drivers.iso,index=3,media=cdrom \
-boot d \
-net nic,model=virtio \
-net user,hostfwd=tcp::3389-:3389 

# If you need to install any additional softvare via CD - replace the drivers.is

# Enjoy the VM :) 
# If you have issues you can reach me @ twitter/astr0baby