VM running too fast, how do I slow it down?

This is for discussing general topics about how to use VirtualBox.
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RarelyEvil
Posts: 4
Joined: 21. Sep 2010, 10:00
Primary OS: MS Windows 7
VBox Version: OSE other
Guest OSses: Win XP, DOS, Win 3.1

VM running too fast, how do I slow it down?

Post by RarelyEvil »

Hey everyone,

After watching some instructional video's on the web, I managed to install DOS 7 and Windows 3.1 on a Virtual Machine. Now I installed some old skool Windows games, but they run waaaay too fast to be playable.

Is there a way to slow down the machine?

Thanks for any help,
Alex.

EDIT: I tried Google to find a solution, but all I found was people complaining about their VM being too slow...
fixedwheel
Volunteer
Posts: 1699
Joined: 13. Sep 2008, 02:18

Re: VM running too fast, how do I slow it down?

Post by fixedwheel »

they dont measure time, they are programmed for specific CPU clock

clock down the host to 4,77MHz ;) old Hardware that could do more like about 12-40MHz had a "turbo" switch for playing those games clocked down w/ "turbo" off
RarelyEvil
Posts: 4
Joined: 21. Sep 2010, 10:00
Primary OS: MS Windows 7
VBox Version: OSE other
Guest OSses: Win XP, DOS, Win 3.1

Re: VM running too fast, how do I slow it down?

Post by RarelyEvil »

Thanks for the reply.

But, how do I "clock down" my VM?
fixedwheel
Volunteer
Posts: 1699
Joined: 13. Sep 2008, 02:18

Re: VM running too fast, how do I slow it down?

Post by fixedwheel »

no way with VBox, its not made for that. Maybe you could have luck with a terribly slow emulator like Bochs ...

better get some real hardware (max. i486 CPU) for that
RarelyEvil
Posts: 4
Joined: 21. Sep 2010, 10:00
Primary OS: MS Windows 7
VBox Version: OSE other
Guest OSses: Win XP, DOS, Win 3.1

Re: VM running too fast, how do I slow it down?

Post by RarelyEvil »

Hmm... Too bad.

I fumbled around with Bochs for a few minutes, but it's not very user friendly...
mpack
Site Moderator
Posts: 39134
Joined: 4. Sep 2008, 17:09
Primary OS: MS Windows 10
VBox Version: VirtualBox+Oracle ExtPack
Guest OSses: Mostly XP

Re: VM running too fast, how do I slow it down?

Post by mpack »

I have no personal experience with it, but I keep hearing people recommend DOSBOX for playing old games. I believe its a full CPU simulator, so it should be suitably slow...
RarelyEvil
Posts: 4
Joined: 21. Sep 2010, 10:00
Primary OS: MS Windows 7
VBox Version: OSE other
Guest OSses: Win XP, DOS, Win 3.1

Re: VM running too fast, how do I slow it down?

Post by RarelyEvil »

I know, it works well.
But, you can't install Windows 3.1 on it.
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