While 5.03 is a Windows 98/2000/XP application, it runs beautifully inside a on modern hardware. Newer versions (6.04+) often crash the VM due to their reliance on deprecated Windows Kernel drivers. For users running the free VirtualBox or VMWare Player, CPS 5.03 is the definitive choice.
Use a physical DB15 programming cable paired with a Radio Interface Box (RIB) . USB-to-serial adapters are notoriously unreliable with this specific legacy software; a native RS-232 serial port is highly recommended. astro spectra cps 503 rvn4183 better