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