dosbox
preferences file on windows
C:\Users\USERNAME\AppData\Local\DOSBox
edit autoexec.bat
see autoexec section in subl ~/Library/Preferences/DOSBox\ 0.74-3-3\ Preferences
mount
intro mount
mount c ~/c
imgmount
imgmount b ~/c/disk1.img -t floppy
imgmount -u b # unmount