how do u test the game in the program?
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Alas you can't, you'll need to use an assembler and an emulator. Everyone's different so choose your own setup, you can configure it yourself. For example, WinApe is a CPC emulator that has its own assembler included and is an excellent way to test CPC games written with this tool - export a source file, import into WinApe's assembler, then run it