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General discussionSidebar in dosbox games(10 posts)solved(10 posts)solved
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Posted November 11, 2015
I use a very recent ATI video card (R9 200) on an high resolution (1920x1080). ALL DOSbox based games I launch show in full screen mode the same issue: two huge black bars on left and right that "eat" both sides of picture and "bleeding" on top and bottom of the screen. The problem can be solved by running dosbox on window mode (Yuck!). I've already tried different options from DOSbox settings and from video card settings.
Someone here experimented similar issues? How did you solved it?
Thank you for the help!
This question / problem has been solved by timppuimage
Posted November 11, 2015
Most - if not all - DOS games are intended to run in a 4:3 aspect ratio, which - yes - does make your 16:9 screen put black bars on the sides. It's perfectly normal.

Even games running in 320x200 resolution are intended to run in 4:3, even if their resolution seems to suggest 16:10, as they are built for a rectangular rather than quadratic pixel aspect ratio.
Post edited November 11, 2015 by Maighstir
Posted November 11, 2015
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quatro: "bleeding" on top and bottom of the screen.
What does that mean? "Bleeding"?

As said, the black bars on the side are normal, because you are running 4:3 aspect ratio games on a widescreen (16:9?) screen. If those black bars weren't there. then the picture would be stretched horizontally.

However, if you insist that the 4:3 DOSbox games should be stretched to the 16:9 screen, have you tried the "aspect=false" option in the dosbox config file?

Also what does it say on the line "fullresolution="?
Posted November 11, 2015
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quatro: "bleeding" on top and bottom of the screen.
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timppu: What does that mean? "Bleeding"?

As said, the black bars on the side are normal, because you are running 4:3 aspect ratio games on a widescreen (16:9?) screen. If those black bars weren't there. then the picture would be stretched horizontally.

However, if you insist that the 4:3 DOSbox games should be stretched to the 16:9 screen, have you tried the "aspect=false" option in the dosbox config file?

Also what does it say on the line "fullresolution="?
I'll try it.
In the meanwhile: "Bleeding" is to say that top and bottom of the picture "exceed" the screen. Part of them are cut by the edge of the bottom.
Posted November 11, 2015
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quatro: In the meanwhile: "Bleeding" is to say that top and bottom of the picture "exceed" the screen. Part of them are cut by the edge of the bottom.
A screenshot would be helpful.
Posted November 11, 2015
I also occasionally have had problems with bottom and top parts of the DOSBox being outside the monitor :-( so a solution would be nice.

Stretching a game made for 4:3 to widescreen almost always looks horrible.
Posted November 11, 2015
This is the effect i get when I launch a DOSbox game. One show how SHOULD be (by some reason the pic taken with stamp key was full), in the second pic you see what I get (I've done small editing of the pic to show you the visualization i get).
Attachments:
screenshot_2.jpg (72 Kb)
screenshot_1.jpg (78 Kb)
Posted November 11, 2015
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quatro: In the meanwhile: "Bleeding" is to say that top and bottom of the picture "exceed" the screen. Part of them are cut by the edge of the bottom.
Ah, now I get it.

Not sure if the aspect setting is relevant for that particular problem, but I suggest you try different values for the fullscreen value at least, maybe also e.g. output. Here are some values that seem to work for me:

Under [sdl]:

fulldouble=false
fullresolution=0x0
windowresolution=1152x864
output=ddraw

For fullresolution, I think 0x0 should automatically detect your Windows desktop resolution and use that, but in case that doesn't work, try fullresolution=1920x1080

Under [render]:

frameskip=0
aspect=true
scaler=none

EDIT: Accidentally I also found this tidbit about another DOS(box) game, Blood:

[url=http://www.dosbox.com/wiki/GAMES:Blood#Video]http://www.dosbox.com/wiki/GAMES:Blood#Video[/url]

It mentions a similar issue as yours (clipped fullscreen mode), so maybe this works for your issues too?

Works flawlessly, even in high resolutions thanks to the DOSbox VESA support. Set

machine=svga_s3

to enable VBE support.

However, if you own the widescreen display (not very uncommon nowadays) you may find fullscreen mode to be clipped somehow (mostly at the bottom of the screen) or corrupted otherwise. You may try switching the resolution by pressing F8 in-game, or follow the steps below.

In your dosbox.conf file, set:

aspect=true
fullresolution=0x0
output=overlay
Post edited November 11, 2015 by timppu
Posted November 11, 2015
Kiitos Timppu! Thank you Timppu!
Posted November 11, 2015
Problem seems to be solved. Thank you very much!
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General discussionSidebar in dosbox games(10 posts)solved(10 posts)solved
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