VGA 320x200 mode w glshaders seems scale incorrectly Dosbox-X/Staging others, using 640x480@60 hz downscaling helps \ VOGONS

VGA 320x200 mode w glshaders seems scale incorrectly Dosbox-X/Staging others, using 640x480@60 hz downscaling helps

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First post, by rico001

Posted on 2026-02-07, 02:48

rico001 Offline

Rank Newbie

Rank: Newbie
Posts: 43
Joined: 2019-11-13, 19:17

I think DOSbox glshaders/scalers do not look good /work right. They upscale for some reason... Example from log on World Rally Championship fever... Auto-switched to shader 'crt/vga-1080p'
2026-02-06 20:34:15.338 | SDL: Using standard SDI (auto) display refresh rate of 60 Hz Windows 11 oled tv.
2026-02-06 20:34:15.351 | DISPLAY: VGA 720x400 16-colour text mode 03h at 70.087 Hz throttled VFR, scaled to 1067x800 pixels with 1:1.35 (20:27) pixel aspect ratio

need to go to 640x400(double-scan) and maybe use standard of 640x480 emulated... will try to explain better and post more info...

The glscaler scaler standard may be the issue... On Windows 95/98 with crt monitor it had an option to use double-scan in a compatibilty mode (I think I remember from command and conquer red alert) So am trying to say upscale differently for 320x200 games.

Reply 1 of 2, by rico001

Posted on Yesterday, 20:31

rico001 Offline

Rank Newbie

Rank: Newbie
Posts: 43
Joined: 2019-11-13, 19:17

Found a ton of cool info, ideas failed couldn't get a game working in .82.2 might try regular dosbox, am able to use both monitor and tv -2000+(date) years... Found out 320x200 (might be mode 12h) might be considered 16:10, and might not work on tv's 1280x800... Still learning... hopefully ok to post here, learning alot remembering fun things ...

Reply 2 of 2, by theelf

Posted on Today, 14:51

theelf Offline

Rank Oldbie

Rank: Oldbie
Posts: 1169
Joined: 2011-09-25, 19:39

Cant understand anything

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