Sanyo MBC-550 Series User Manual page 37

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If your application software is on another disk and you
have a single drive system, you will have to remove the
diskette now in the drive and replace it with the
application diskette. If you have two drives, the
application software may be on the second drive (drive
on left) and you may enter Bs to access that drive,
then a DIR to obtain a listing for that drive. Enter
commands by typing in the filenames just as you would
for single drive systems.
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