⚠️ This is a work in progress: Don't fabricate PCBs from these files yet!
This project started as attempt to clone the Vortex F1-D floppy controller, which supports two 720k DSDD drives. The desire was to have a controller that can support four drives at the same time. The starting point was a capture of the original PCB into a schematic, which can be found in the original directory.
Multiple variants have been designed, but none of the designs in this repository have been tested, don't fabricate any PCBs at this point!
The no-rom variant contains a revised, but wasteful address decoder and no ROM socket. It works to some extent, but the first revisions contained multiple errors and required several patches. The version in this repository has the fixes applied, but was not yet fabricated and tested.
The no-rom-cpld variant replaces the TTL chips with a CPLD, reducing the part count significantly.
The rom-cpld variant adds a Flash ROM that can act as a universal ROM box in addition to holding an operating system ROM to drive the floppy disk controller.