Using a 2x scaler, I was able to get the resolution you suggested, but there was no way of getting it to play nice with any of the CRT shaders. That's not the end of the world, but I did manage to make some further progress. Instead of using a 2x scaler, I manually set the resolution of DosBox for …

I use DosBox SVN Daum to run my old DOS games. I use that version because of the nice options for CRT shaders. I love how older DOS games in a 320x240 or 320x200 resolution look. Even without CRT shaders, the pixel art looks great scaled up on a modern monitor. Later games with a 640x480 resolution …