Roland D-50 Owner's Manual page 11

PLAY MODE
Connect the Memory Card securely and correctly as shown in the
diagram.
Memory Card
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Internal Button Card Button
To call a Patch on the Memory Card, simply push the Card Button.
To return to the Internal Memory mode, push the Internal Button.
*The Patches preprogrammed on the supplied Memory Card (ROM) can
be restored even if rewritten with new Patches.
*Please be sure to use the correct Memory Card (e.g, the supplied
Memory Card, M—256D, etc.).
*If you use a Memory Card that contains data for equipment other than
the D—50, the following error message will be shown in the Display
for a few seconds,
Illegal Card
*The optional memory card M~256D comes from the manufacturer
without any data programmed on it, therefore, if you try to read data
from it, the above error message is shown for a few seconds,
indicating that the memory card cannot be used. To avoid this, it is
required to copy the D—50's data onto the memory card before using
it, as explained on page 65 "a. Patch Transfer to the Memory Card"
in the different volume ADVANCED.
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