DOSBox is a free emulator that runs the disk operating system, or DOS, games on operating systems, such as Windows, Mac OS X and Linux. DOSBox creates an instance of DOS that runs in a window on your desktop by default. You can make DOSBox always start in full-screen mode on Windows 7 or other operating systems by editing its configuration file, since it doesn't have a graphical options window. You can also switch between windowed and full-screen modes while DOSBox is running using a keyboard shortcut.
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Close DOSBox if it's running.
Click "Start." Type "C:\Users\YourName\AppData\Local\DOSBox" into the search box at the bottom of the Start menu, replacing "YourName" with your Windows account name, and press "Enter."
Double-click the "Dosbox-[version].conf" file in the DOSBox folder to open it in a text editor.
Change "fullscreen=false" in the text editor to "fullscreen=true".
Click the "Save" option in the text editor.
Tips and warnings
- Press the "Alt" and "Enter" keys on your keyboard at the same time while DOSBox is running to toggle between full-screen and windowed modes.
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