Today, with supplies of 3" disks draining and company solutions no longer being produced, a self-made 3 1/2" disk drive is the perfect supplement for every CPC user.
=== Schematics ===
[[Image:CPC664 - 3.5 w RDY.jpg|frame|none|Schematics for PC disk drives with own READY signal on an Amstrad/Schneider CPC664/CPC6128 (Non-German CPC6128 only)]]