Added notes about VirtualBox

README.md

@@ -25,10 +25,12 @@ Use this command line:
  nasm -f bin ray.asm -Dcom_file=1 -o ray.com
  nasm -f bin ray.asm -Dcom_file=0 -o ray.img
 
-Tested with VirtualBox for macOS running Windows XP running this interpreter, it also works with DOSBox and probably with QEMU:
+Tested with VirtualBox for macOS running Windows XP and also executing directly the bootsector. It probably works with QEMU:
 
  qemu-system-x86_64 -fda ray.img
 
+Because DOSBox-X runs very slowly, I further tested with VirtualBox over Windows 11 (Asus TUF F17), created a Windows XP 32-bit machine (you don't need to install Windows nor a hard disk image), in Configuration/Storage in the bottom there is a icon saying "Add controller", choose I82078 (floppy), then click "Add floppy drive", and select the boot sector as image (ray.img).
+
 ![Ray tracer in a boot sector](RayTracer.png)
 
 ## More on this?