Qemu does not show all files on floppy or hard drive (MS DOS 6.22 guest)

My host system is a raspberry pi model B 512MB. To start qemu I typed into lxterminal:
  
qemu-system-i386 -hda qemu.img -Fda Dos622-1.img -boot a

Qemu version 1.7.0+dfsg-3 installed as package. The DOS disks were downloaded from winworldpc.com and if I mount them under Linux I see all the files, but on qemu I see the first 3 files only. The hard drive image I am using is a 30MB flat image created using bximage.