Debugging tools for Apple II computers come in two basic flavors. The first and most common flavor is the software based debugger. If you have used a debugger before, chances are it was one of this type. A software based debugger is nothing more than a program that you run in your Apple II computer just as you would run any other type of program. They usually allow single stepping, tracing and possibly breakpoints for real time debugging. However, these programs MUST occupy part of the system memory.
The other flavor of debugging tool is the hardware type. Most hardware debuggers have very limited features. They may allow you to interrupt programs and to step and trace your program, but don’t expect much more. Some even require you to look inside your computer to read the address and data of each instruction from little lights on the side of the card.
What you really need is a tool that combines the best features from the debugging programs with the unique capabilities that only hardware can provide. What you really need is the Prodev Development & Debugging Tool.
The Prodev DDT is a combination of a very extensive debugging program along with unique hardware features, all working together to create the most powerful programming tool available for the Apple II computer.