[gnufied]

> . I guess SeaBIOS can't figure out how to assign I/O space to all devices that want some, and so it simply gives up?

It appears that although for some devices VM works fine but for others the VM refuses to boot (esp e100)

So the answer might be more nuanced than it seems?

[chociej]

Those devices for which it works fine are such devices that don't request any I/O space