So, the VirtualPC emulated floppy *also* has quirks.

I don't understand them.  The following change apparently causes the floppy
drive to run, but I get pages and pages of:
	isa0: _isa_dmadone: channel 2 not finished
from the kernel.

Does anyone know the floppy driver well enough to suggest what might be
involved?  I'm a little stumped.

*** ./dev/isa/fd.c.orig	Mon Dec 25 15:14:44 2000
--- ./dev/isa/fd.c	Mon Dec 25 15:32:34 2000
***************
*** 1094,1100 ****
  
  		disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid));
  
! 		if (fdcresult(fdc) != 7 || (st0 & 0xf8) != 0) {
  			isa_dmaabort(fdc->sc_ic, fdc->sc_drq);
  #ifdef FD_DEBUG
  			fdcstatus(&fd->sc_dev, 7, bp->b_flags & B_READ ?
--- 1094,1100 ----
  
  		disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid));
  
! 		if (fdcresult(fdc) != 7 || (st0 & 0xd8) != 0) {
  			isa_dmaabort(fdc->sc_ic, fdc->sc_drq);
  #ifdef FD_DEBUG
  			fdcstatus(&fd->sc_dev, 7, bp->b_flags & B_READ ?