Allows to upgrade a single -S drive to a dual -D drive.
=== Third 3" drive adapter ===
Allows to connect Since the F1-D was originally intended as an additional 3" drive in between a upgrade to CPC 464 and setups already having a F1DDI-D1, this adapter allowed to continue using the FD-1 floppy drive. Since only two drives can be accessed at onceused simultaneously, the drive had to be selected manuallyusing a RSX command.
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