I was using your .vbox file from GitHub. I have no idea why the ALT key isn't working. I tried changing to US keyboard layout but to no avail. I'm under Linux / x11 and I don't have any hotkeys on ALT.
The speed is perhaps 1/100th of what QEMU was putting out. May be related to not having correctly set up the virtualbox modules or something?
Sadly I can't explain the alt problem. I suppose I could rebind that to something like the space bar and upload a modified floppy image. I will poke at that later.
The speed is perhaps 1/100th of what QEMU was putting out. May be related to not having correctly set up the virtualbox modules or something?