I could play PacMan at 4.77MHz using the Turbo button. While DOSBox allows you to configure guest CPU speed, VirtualBox doesn't.Īl and I agree this is likely no problem for many DOS/Win3.x programs. Now, instead of running at 20MHz, the OS is forced to execute at 3900MHz instead (or whatever speed your modern AMD64 host CPU runs at). For example, here we have an OS designed to run on DX (20MHz) to DX4 (100MHz) setup with a hardware Turbo button present for the explicit purpose of REDUCING the CPU clock speed to 4.77MHz. Your response to al indicates you didn't correctly read the point (s)he made.Īl said the HOST makes the GUEST very/too replied as if al had said the GUEST makes the HOST CPU very/too BUSY.Īl said the guest CPU runs at the host CPU's clock speed. If so, please don't see this as criticism. Hi I realise that English may be a second language to you. > Actually, you can drastically reduce the CPU load > Of course, this may not be a problem on many Dos/Win31 programs. > Can only limit CPU usage of Dos on host, but this does not limit CPU speed. > There is no way to slow down the client system in VirtualBox. Unfortunately, Win31/Dos622 programs run at host's CPU Speed.
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