Can't you do this in your graphics card control panel? I think you can force refresh rates there.

Mmm, I certainly would not like to do this, it would be very tedious.
Moreover it's not possible I guess, as most monitors only support 60hz (or more).

have you tried the cvs of dosbox ? (maybe try a different chipset or so)

however our refresh rate calculations are pretty accurate as far as I know

Hi Qbix
I downloaded latest aep compile. What should I change there ?
I dont see any parameter regarding refresh rate or so (?)

Oh maybe my question wasn't clear enough.
What I meant is that some games are too slow or fast TO MY TASTE 😉
So I'm looking for a solution to change gamespeed.

thanks

Another very, very strange post...

You're using the wrong tool for the job, so to say. Changing the refresh rate in emulators is not an adequate tools for speed control. Read this for more info.

I don't understand why you would change the emulation speed in MAME, as MAME is quite accurate in emulating the correct speed of emulated games, no matter what the actual screen refresh rate is (emulation accuracy is one of MAME's basic premises). In MAME, you can change frameskip with F8/F9, and "throttle" emulation speed with F10 (speed up the emulation, that is). I don't think there are any other options for changing emulation speed in MAME, so your changing of the refresh rate is nothing more than a "dirty workaround". Other emulators may have more options for changing emulation speed (like slowing down the emulation to make hard passages in games easier).

Anyway, the correct tools for speed control in DOSBox are "cycles" and "core". For slow machines, you can increase the emulation speed by using "frameskip". The DOSBox readme explains all commands in detail.

sorry emodel. dosbox isn't a cheat machine 😀

Qbix wrote:

sorry emodel. dosbox isn't a cheat machine 😀

OK, thanks Qbix. I'll stick with builds which have vsync, and mame which IS a cheat machine, it seems (It is just giving options to the user, but call it what you want).

Cheers.

it was a nice term for it I thought.

Sticking with vsync doesn't gain you anything for this purpose, it's not tied to system speed like in mame.

Ah ok, so it's maybe just MY dosbox version which slows games down when I reduce it.
How cool ! 😀

Only if a game's timing were based on refresh rate, otherwise placebo.