VOGONS


First post, by Mumpu

User metadata
Rank Newbie
Rank
Newbie

I ran into a weird graphics problem with Microprose's F-19. The ground color spills through the horizon and covers parts of the sky, and objects leave trails. This only happens in DOSBox (both 0.60 and 0.61) -- the graphics are fine if I run the game directly from Win98 other than way too fast.

This happens in both full-screen and windowed modes with surface, overlay, opengl and openglnb graphics modes, and in MCGA, EGA and CGA game resolutions.

Any suggestions?

Athlon XP1900+ 384 RAM GeForce 2 Win98
DOSBox 0.61

Last edited by Mumpu on 2004-03-25, 20:58. Edited 1 time in total.

Reply 1 of 9, by Mumpu

User metadata
Rank Newbie
Rank
Newbie

C'mon guys, no ideas at all? 😜

Reply 2 of 9, by Matt2

User metadata
Rank Newbie
Rank
Newbie

I have got the same problem with this game and also with F15 STRIKE EAGLE II...

Reply 3 of 9, by Qbix

User metadata
Rank DOSBox Author
Rank
DOSBox Author

wait/hope for the next version.

Water flows down the stream
How to ask questions the smart way!

Reply 4 of 9, by Tiger-Heli

User metadata
Rank Newbie
Rank
Newbie

Thought I would add a post in case anyone has any suggestions on what could be causing this:

I am having a problem with graphics artifacts in Microprose F-19 Stealth Fighter. This is difficult to describe, but I will try. I attached some screenshots. (I had to run DosBox in Windowed mode for the screenshots to look accurate, but it runs fine in full-screen mode).

First off, I am running the basic 0.63 build of DosBox (I plan to upgrade to the CVS build, but haven’t yet). I have an AMD 2800 Barton, 768M of Ram, 128M ATI Radeon 9200 Graphics card, etc.

Microprose F-117A Stealth Fighter 2.0 runs fine in DosBox (AFAICT), so the problem is not with the DosBox setup itself.

If I run the game directly in Windows XP (no DosBox), the sound is bad and plays through the PC speaker, the gameplay is a bit too fast, and the speed is a bit choppy, but the graphics are crystal clear.

In DosBox, the sound and speed are excellent. (See attached screenshots. Ignore the pixellation from the .jpg compression.) This is a very basic PC game. The first screenshot is just before takeoff. The sky in this game should always be the same cyan color that you see here. The second screenshot shows how the game looks a little while after playing it. The sky will randomly change colors and return to cyan. In the screenshot, I am flying toward a single house, but the house is not being cleared as the plane advances, so you see shadow images behind the house. Eventually, these shadow images will fill up the screen and obscure the HUD text. The screen will also “fix” itself when a waypoint is reached, only to have the problem re-occur.

I am also enclosing my dosbox.conf file, although I am not sure what I have changed or should have left alone.

Here is what I have tried:

Fulldouble - true - seemed to make the images crisper, but no effect.
Fullfixed - no effect
Output - overlay and ddraw made the screen look “fuzzy”, no effect on problem.
Memsize - tried reducing this to 2, 1, and 0.64 since this is what this game probably expects, no effect. Since it ran fine in WinXP, I doubt this is the problem.
Scaler - changed from normal2x to none - had to adjust monitor for fullscreen afterwards. Seemed to help, but didn’t eliminate the problem.
Core - changed from normal to simple - no effect.
XMS and EMS - changed from true to false - no effect.

Any suggestions on what areas to change?

Reply 5 of 9, by Tiger-Heli

User metadata
Rank Newbie
Rank
Newbie

Just wanted to report to everyone that this problem is FIXED with ykhwong's 11/11/05 CVS (and other ??) builds available here:
DOSBox SVN Builds

I had to change core from dynamic to normal (it locked at mission start with dynamic core selected), and I changed CPU cycles from 8500 to 3000 just because that's what I previously used, but not sure it was necessary.

Anyway - much thanks to the DosBox team for all of their hard work in fixing this!!!!

Reply 6 of 9, by Qbix

User metadata
Rank DOSBox Author
Rank
DOSBox Author

glad to hear it is allready fixed

Water flows down the stream
How to ask questions the smart way!

Reply 7 of 9, by HunterZ

User metadata
Rank l33t++
Rank
l33t++

Could be an issue in the dynamic core though.

Reply 8 of 9, by Tiger-Heli

User metadata
Rank Newbie
Rank
Newbie

Could be an issue in the dynamic core though.

I read another post on here (maybe DosFreak's .conf file) saying Dynamic Core could cause lockups, so that's why I thought to change it.

Reply 9 of 9, by HunterZ

User metadata
Rank l33t++
Rank
l33t++

That is correct. Dynamic core does some complicated stuff to try to emulate the CPU faster; however, there are certain things that some games do that will actually make it slower than normal emulation, and other things that can cause games to crash or freeze.