I am running DOSBox v 0.74-2 on Centos 7. I have a floppy image and DOS 6.22 image (both .img files) mounted and useable. Boots to DOS 6.22 fine and can use both floppy and disk. I can DOSBox mount an .iso cdrom and local directories and cand use them fine from DOSBox but not from the booted DOS 6. …