====== IBM PC DOS 7.1 ======

Taken from https://forums.virtualbox.org/viewtopic.php?f=4&t=80531

==== PC-DOS 7.0/2000 Boot Floppy ====

<code>
Get a PC-DOS 7.0/2000 boot floppy and leave just the following files:

ATTRIB.EXE
COMMAND.COM
IBMBIO.COM 
IBMDOS.COM 
FDISK.COM 
FORMAT.COM
</code>

==== Boot, Partition and Format ====

Boot from the PC-DOS 7.0/2000 floppy and partition your drive as needed. 

Make sure you 'sys' the drive using //format /s//

//Warning: I found that formatting a FAT32 partition was not supported and had to do that on another system, though the formatted partition did actually show up fine after being created on another system.//

==== Add PC-DOS 7.1 System Updates ====

Get a copy of the newer PC-DOS 7.1 files (they are under 1MB in total) and copy them to a floppy disk under a PCDOS71 folder.

=== Removing PC-DOS 7.0/2000 Files ===

<code>
Delete the 7.0/2000 system files (IBMBIO.COM, IBMDOS.COM, COMMAND.COM) from the formatted hard drive:

A:\>ATTRIB -S -H -R C:

A:\>DEL C:\*.*
</code>

=== Install PC-DOS 7.1 Files ===

<code>
Copy the 7.1 system files to the C: drive. //Make sure you do it in this order!//

A:\>CD PCDOS71

A:\PCDOS71>COPY IBMBIO.COM C:
        1 file(s) copied

A:\PCDOS71>COPY IBMDOS.COM C:
        1 file(s) copied

A:\PCDOS71>COPY COMMAND.COM C:
        1 file(s) copied

</code>

=== Add a DOS Folder ===

<code>
Create a DOS directory on C: and copy the 7.1 files into it:

A:\PCDOS71>MKDIR C:\DOS
A:\PCDOS71>COPY *.* C:\DOS
   ...
XCOPY.EXE
       43 file(s) copied
</code>

You should now have a formatted PC-DOS 7.1 partition with just the new PC-DOS 7.1 system files in C:\DOS.