startergo

In Linux yes. But the same hard drive build in Linux crashes in Windows Qemu host. Something gives in Windows.

idk. You would have to enable debugging in OC and inspect the log file.

https://github.com/corpnewt/USBMap

That is because the file is in another directory: https://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/distributions/1.2/official/FD12FLOPPY.zip