Ah, yeah that's an idea that had crossed my mind. My shader knowledge is pretty lacking so I wasn't sure how I would go about that. Thanks for the tip!

I got it to work! Thank goodness for FOSS ^^ All I ended up doing was replacing the contents of ScaleNormalDh (I figured Dh = Double height) with the contents of ScaleNormal1x in render_scalers.cpp. Looks so much more like the real thing now!

Ah, that's a bummer. I imagine it was implemented that way to simplify the displaying of 640x200's oblong pixels when running pure DOSBox. Thanks for the reply, though - and thanks for all your contributions to DOSBox!

Well, a few things: The normal2x scaler does come in handy for simulating the scanline doubling on VGA and other computer displays. I haven't found a way to make that happen with just CRT-Royale by itself. In this instance, however, I'm trying to force the scaler off , rather than on . From what I …

Ok, so after some more testing, I found out it's not a matter of graphics vs. text mode, but of horizontal resolution: each mode with 320 pixels reflects whatever scaler is selected, but each 640 pixel mode is seemingly locked to normal2x. Not sure if that helps for coming up with a solution...

Hello! This is a bit of a niche case, but I'm using RetroArch with the DOSBox-SVN core to emulate a system with a CGA display. With the CRT-Royale shader, it does an incredible job at simulating a CRT display on my 4K monitor, but the problem I'm running into is getting it to simulate a single …