Right after that I like to change scaler=normal2x to scaler=hq3x. To do this I change the aspect=false line to aspect=true. Once the output is set to ddraw, we can enable aspect correction and scaling. Some DOS resolutions do not use square pixels, so aspect ratio correction keeps these games from looking “squished” on the screen (old CRT monitors did not have a fixed number of pixels, so this was not an issue back in the day). Next I change output=surface to output=ddraw to allow for scaling and aspect ratio correction. If your monitor is different, be sure to use its resolution (e.g. Open the nf file via the Start menu.įirst, I change the line that says fullresolution=original to fullresolution=1920x1080, which is my monitor’s native resolution. These settings can be changed by opening the DOSBox Options from the Start menu. The nf file controls how DOSBox displays old games and software. We then use regedit to find the registry subkey HKEY_LOCAL_MACHINE > SOFTWARE > Microsoft > Windows > CurrentVersion > SideBySide in the left sidebar, then right-click in the main window and select New > DWORD (32 bit) Value.Compared to today’s high-definition games, DOS games used low resolutions, so playing old games in DOSBox on a modern LCD monitor or HDTV is not an optimal experience without some configuration. To do this we open regedit.exe by pressing the windows key, typing run, pressing Enter, typing regedit, and pressing enter. Then we need to tell Windows to look for manifest files when opening programs. To do this we download the manifest file linked at the bottom of the page, then move this manifest file to the same place that you installed RTIViewer usually C:/Program Files/RTIViewer by default. This may leave icons and text a little blurry, but it makes the program usable. To fix this we need to tell Windows 10 not to try and scale up the program intelligently, but to run it at its native resolution and magnify the whole thing. On some computers with High DPI displays the RTIViewer program doesn't scale up properly, leaving the buttons too small and the text no longer fits on them, as below:
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