Seems to work out of the box on windows.
Please try :
- Open the workspace in vscode (not the folder)
- Open gencop.s file
- Build the source with the build button on the status bar
- Place a breakpoint in line 32
- Select the debug config
- Type F5
You should stop on line 32.
It works on my windows 10 64b worstation.
Tell me if it worked.