KVM x86 in ROS 3.30.

RouterOS Virtualization
1

Hello.
How to install other OS in KVM on x86 RouterOS 3.30?
CPU supports VT-x.
I try

disk-images=cdrom:install.iso,hda:linux.img
  • but this version don’t understand
cdrom:foo.iso

so tried

disk-images=hdc:install.iso,hda:linux.img

but still nothing.
For now i can’t upgrade ROS to newer version.

Any other hint, ideas?