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/* F1-S and F1-D (5,25") */
Image:Vortex f1 manual disk.jpg|F1-S/D system disk<br />(CPC 664/6128)
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The floppy controller of the F1-D / F1-S was cloned by Hans Hübner of FutureSoft with MX4 connector and without ROM slot. It supports four drives. Under FutureOS they are named E-H.
=== A1-S Upgrade Kit (5,25") ===
