Image:F1DCONT.jpg|F1-D Interface Board (CPC 6128)
</gallery>
=== Second Drive Upgrade ===
Vortex offered an upgrade option that allowed an F1/M1-S single drive to be upgraded to an F1/M1-D dual drive. To do this, one simply had to install an additional drive in the free drive slot of the S-drive housing.
=== FDA-1 3" Drive Adapter ===
Image:Vortex 3rd drive adapter insides closeup.jpg|Inside the adapter box (closeup)
</gallery>
=== Second Drive Upgrade ===
Vortex offered an upgrade option that allowed an F1/M1-S single drive to be upgraded to an F1/M1-D dual drive. To do this, one simply had to install an additional drive in the free drive slot of the S-drive housing.
== Z-Drives (180K) ==