console_debugger
The option documentation is properly formatted yet
Default: 0 Example: 1 Type: boolean
In order to be able to use F12+D to enter the (console) debugger, you need to have set this option first. This is to avoid people getting accidentally stuck in debugger mode.
This only works if you run FS-UAE from a terminal.
Source: https://github.com/FrodeSolheim/fs-uae/blob/master/docs/options/console_debugger