So... You want DOSBox to display the same thing sixty times a second?

Perhaps you could try changing the "output=" line in DOSBox.conf.

I think IIRC there was an update to the Direct3D patch that forces screen updates. Dunno if the daum build integrated that.

Jorpho wrote:

So... You want DOSBox to display the same thing sixty times a second?

Perhaps you could try changing the "output=" line in DOSBox.conf.

I do but also Steam appreciates it very much.
The Steam Overlay functions very poorly at low framerates. The reason I wondered if it was possible to lock it to 60 is so that the steam overlay can function fluidly in Direct3D and, if possible, OpenGL output modes.

I have tried changing the "output=" line in the conf file. Most of the OpenGL modes will actually freeze up the Steam Overlay if there is no on-screen activity. I've found Direct3D to have the least amount of problems.

leileilol wrote:

I think IIRC there was an update to the Direct3D patch that forces screen updates. Dunno if the daum build integrated that.

That would be an amazing option if its available. Unfortunately, I am no coder and have almost no experience when it comes to reading code and compiling things. I'll just have to wait for it to be added if it hasn't been done so already.

Thanks for the information, it's greatly appreciated 😀

why do you want constant 60fps?

robertmo wrote:

why do you want constant 60fps?

Saleck wrote:

The Steam Overlay functions very poorly at low framerates. The reason I wondered if it was possible to lock it to 60 is so that the steam overlay can function fluidly in Direct3D and, if possible, OpenGL output modes.

Why do you want the Steam overlay while using DosBox?
Anyway...
I don't think it's possible due to the way DosBox (Daum or else) draws its frames...DosBox doesn't really redraw the whole screen (it's quite efficient that way) so...if nothing changes, there's really nothing to draw, so, no need to keep drawing at 60 fps.

gulikoza wrote:

edit: the next version of the patch will also support forcing full updates from the shader, so the alpha-feedback shaders (as posted by leileilol above) will work correctly.

relevant because this will also stop the 'steam overlay is slow' problem.

As for this "why do you need that"...... ever had some chatty friends on Steam?

Yeah...that's why I tend to appear offline, don't like to be bothered while gaming.

Newest Daum build (May 2013) does not have the new D3D patch yet, probably the next version will. With the new patch it is possible to force full screen updates through shader by inserting:

1bool forceupdate : FORCEUPDATE = true;

into the shader .fx. You could use point.fx shader with the above line to force D3D to do 60fps (or whatever the emulated refresh is). Only the screen is redrawn, not the whole dosbox graphics subsystem, so the speed impact shouldn't be too bad.