In the mid-1980s, Nantucket Corporation released a product that would redefine the landscape of business application development: . Later acquired by Computer Associates (CA), this compiler for the dBASE III language turned interpreted database scripts into fast, standalone executables. For nearly two decades, CA-Clipper (versions 5.0, 5.01, 5.2, and the landmark 5.3) powered inventory systems, accounting software, payroll applications, and CRM databases across the globe.
| Goal | Best Tool | |------|------------| | Run existing Clipper EXEs | or vDos | | Recompile old Clipper code | DOSBox + Clipper 5.3 | | Modernize project | Harbour compiler (native) | | 32-bit Windows 10 only | NTVDM (built-in) |
The most elegant solution for running is vDos (virtual DOS). Unlike generic emulators (DOSBox), vDos is explicitly designed for legacy business applications. It provides: ca-clipper for windows 10
Running is not a permanent solution—it’s a bridge. The emulation methods above give you 3 to 5 more years of operational life. You should simultaneously invest in:
For a future-proof solution, the best approach is to re-compile your Clipper source code into a native 32-bit or 64-bit Windows application using a compatible compiler. In the mid-1980s, Nantucket Corporation released a product
Another excellent alternative is vDosPlus. It is a fork of DOSBox specifically optimized for serious applications rather than games. It offers better window handling and seamless integration with Windows printers—a notorious pain point for Clipper users.
vDos is a for running business/DOS apps on modern Windows. | Goal | Best Tool | |------|------------| |
: While primarily for games, it can be used to run the Clipper compiler itself or simple standalone apps.