Microsoft Virtual Machine Additions are a set of utility programs to enhance the functionality and performance of Virtual Machines. In addition, you can easily share a drive letter or path from the host computer making it accessible to the guest operating system.
Start the MS-DOS 6.22 Virtual Machine. Select the "Floppy" menu tab at the top of the screen (see screenshot below) and select "Capture Floppy Image". Select the file "C:\Program Files\Microsoft Virtual PC\Microsoft Virtual Additions\DOS Virtual Machine Additions". After successfully capturing the Virtual Floppy Image, restart the Virtual Machine. From the DOS prompt of the DOS Virtual Machine, execute "a:\dosadd.bat". This will complete the installation of the DOS Virtual Machine Additions.
Once the command has been run you will receive a message that states you have successfully installed DOS Virtual Machine Additions. Eject the DOS Virtual Machine Additions virtual floppy disk and restart the virtual machine.
Now that you have the DOS Virtual Machine Additions installed, your virtual machine can now be used to access information on the physical computer.
The Shared folders option in the settings of your virtual machine allows you to access a folder or volume on a host computer as if it were a network share. A shared folder can be shared each time a virtual machine boots up. You can not share folders directly between virtual machines, but multiple guest machines can share a folder on the host operating system.
NOTE: When creating a shared folder, you must assign it to a drive letter that is not already being used by a drive or device in the virtual machine operating system. If two drives or devices are assigned to the same drive letter, the shared drive will not appear in the virtual machine operating system.
Begin by creating and configuring a new virtual machine with the specifications that best fit your machine. Once you have completed setting up you new virtual machine you can then begin to install your operating system. The steps for installing DOS are as follows:
Insert the MS-DOS 6.22 Disk 1 into your computer’s floppy drive.