DIY Chris has introduced the Commodore 1581 Replica Board, a faithful reproduction of the original revision 252326 main board. The Commodore 1581 replica is designed for complete compatibility with the original case and drive assembly, giving enthusiasts the opportunity to rebuild or restore this classic disk drive.
The board alone covers much of what builders need, but completing a working unit requires a few extra parts. Some of these components are harder to source, which is why they are not stocked with the replica. Hobbyists will need to track down a WD1770 or WD1772 floppy controller, an 8K x 8 SRAM chip, and a MOS 8520A CIA. All of these can often be found through eBay or AliExpress. A DPDT power switch, identical to the one used in the Commodore 64, is also required.
For the drive mechanism, most 3.5-inch PC drives can be adapted with minor modification. Many builders have reported success using the NEC FD1231T. The power supply is the same as the one used with the 1541-II drive, and a standard serial cable completes the setup. With these parts in place, the Commodore 1581 replica becomes a fully functional disk drive ready for use.
To complement the board, DIY Chris offers several 3D printed components. These include a replica case, an isolation shield, a drive mount assembly, and a bottom metal bracket. For those who need the system software, the 1581 ROM is available for download directly from his site.
This project offers a practical solution for enthusiasts eager to restore or rebuild a 1581. By sourcing a few key chips and reusing readily available parts, builders can create a reliable drive that works seamlessly with their Commodore systems. The Commodore 1581 replica keeps the classic design accessible to new and experienced users alike.
