| Short name | Description | Year | Manufacturer | Runnable | Parent |
|---|---|---|---|---|---|
| c64dx | Commodore 64DX Development System (Prototype, PAL, German) | 1991 | Commodore Business Machines | Yes | c65 |
| c65 | Commodore 65 Development System (Prototype, NTSC) | 1991 | Commodore Business Machines | Yes |