Microsoft Virtual PC 2004
Virtual Machine Additions for MS-DOS
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.
The following programs are installed by default when adding the
DOS Virtual Machine Additions:
Virtual CD-ROM Device Driver
||File Sharing Device Driver
||Virtual Machine CPU Idle Program
||Mouse Device Driver
This document assumes that you have already created a Virtual
Machine running DOS 6.22. If not, please review the notes section at the end
of this document.
Start the MS-DOS 6.22 Virtual Machine. Select the "Floppy" menu tab at the top of the screen
(see screen shot 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.
Attaching "Shared Drives" to 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
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.
Installing MS-DOS 6.22
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 computerís floppy drive.
Read the MS-DOS 6.22 Setup screen, then press Enter to continue with the
Confirm the time, date, and keyboard settings, then press Enter.
Next, you will be asked to confirm the installation directory. The default
is C:\DOS, which you should accept.
Press Enter to begin the installation process.
You will be prompted for the installation floppies as the setup progresses.
Follow the directions on the screen as they instruct you to insert the correct
floppy and press Enter to continue.
Once the final floppy has been copied, you will be asked to remove all
floppies and then restart your virtual machine, it will then restart using
Once the virtual machine reboots, you will receive a command prompt. You can
confirm that you installed the correct operating system by confirming the
version number. At the command prompt, type the command "ver".