DOSBox v0.72 - I've got a Z instead of a C at the prompt.

A: You have to make your directories available as drives in DOSBox by using
the "mount" command. For example, in Windows "mount C D:\GAMES" will give
you a C drive in DOSBox which points to your Windows D:\GAMES directory.
In Linux, "mount c /home/username" will give you a C drive in DOSBox
which points to /home/username in Linux.
To change to the drive mounted like above, type "C:". If everything went
fine, DOSBox will display the prompt "C:\>".