Kreisen 3 8 6 X / X E - Manual (Page 76)

Turn the door latch to open the drive.
Remove the diskette and insert it into its protective
envelope.
Starting MS-DOS
To start MS-DOS 4.01 on a floppy disk-based system (that is,
on without a hard disk drive), follow these steps given below.
For a detailed description of how to start MS-DOS 4.01,
consult the Getting Started section in your MS-DOS 4.01
User’s Guide.
Remove the MS-DOS Install diskette from its protective
envelope and insert it into the A drive.
Close the disk door and turn your computer on.
Remove the Install disk and insert the Select disk.
Press ENTER.
Remove the Select disk and insert the Install disk.
Press ENTER.
The Welcome screen appears. This screen contains information
about the number of disks required to install the operating
system.
Press ENTER
The Introduction screen appears. This screen contains
information about the function keys used to run the Select
program.
4-4 Using MS-DOS With Your Computer