Hi, > And what are the rules that govern device exclusion from -nodefaults > list? Why -nodefaults does not create empty machine?
"qemu -nodefaults" should give you just cpu + northbridge + southbridge. "qemu" should give you a usable virtual machine, so qemu adds some optional devices which are (or used to be) standard in a pc: floppy, cdrom, serial port, parallel port, vga card, nic. Sometimes things are a bit odd for historical reasons: USB controllers are only present in case you ask for them via '-usb' or add them via '-device', even though they are part of the southbridge. vmport is there unconditionally. And I'd rather make that one configurable instead of adding more hard-coded devices. cheers, Gerd
