[9front] First time 9front start with qemu

[Bengt Kleberg <bengt.kleberg@travelping.com>]

Greetings,

If somebody that has used the new qcow2 images with qemu, could share
how it was done I would appreciate an explanation/copy of that.

I recently read an article about 9front/plan9 and the author mentioned
it was possible to start 9front (with qemu) in just a few minutes. I
have now spent a few days and think it is time to seek help.
Given the right qcow2 file for my computer, 9front-10277.arm64.qcow2.gz from
https://9front.org/iso, I have tried to use the right qemu command,
qemu-system-aarch64, in various ways inspired by the description of
how it was done in the time of ISO files:
http://fqa.9front.org/fqa3.html#3.3.1 (Qemu)

Mostly I have been trying variations on 3.3.1.2 Post-Installation
Booting (since I have no ISO), with some additions demanded by error
messages (-machine virt).
But I only get a new little window with qemu command line. Or I can
get the qemu command line in my original window, and nothing in the
new window (-monitor stdio).

Best Wishes,
bengt