IBM 5150 Manual To Operations page 103

24
Now this message is displayed:
Insert first diskette in drive A
Strike any key when ready
Do this:
24 A
Remove the DOS Diskette.
24B
Insert the back-up diskette.
24C
Press a key.
2S
Keep doing steps 23 and 24 until this is displayed:
Diskettes compare ok
Compare more diskettes? (V
IN)
DOS 3-29