Here's a little proof of concept VM to play with

[mszoek]

I cheated a bit and got a shell. I haven't finished HID yet but we can use the serial keyboard for input. Here is a virtual machine image you can mess around with. Be warned it is VERY MINIMAL.

% tree ravynOS.vm
ravynOS.vm
├── Resources
│   ├── OVMF_CODE_4M.fd
│   ├── OVMF_VARS.fd
│   └── disk.img
└── run-ravyn.sh

It uses qemu-system-x86_64 so be sure you have that on your path. Run run-ravyn.sh from a terminal. You will see it boot up and should get console messages both in the framebuffer window (QEMU window) and to the terminal (your serial console). Whatever you type in the terminal will go to the running shell. Filesystem is read-only after boot. You can copy things to/from it by mounting the HFS disk partition on a Linux or Mac system before booting the VM.

losetup -P loop0 ./ravynOS.vm/Resources/disk.img
mount /dev/loop0p2 /mnt
# ... copy or do stuff ...
umount /mnt
losetup -D