Running old DOS programs: ntvdm.exe takes 100% CPU time

[Sopalajo de Arrierez]

Hello, friends.
I have a problem when running old DOS programs in Windows XP SP3 and SP2: the process ntvdm.exe takes high CPU times and windows VM guest becomes unusable
I have tryed dos-idle with no results (no difference at all), even starting it in "c:\WINDOWS\system32\AUTOEXEC.NT".

Any help, please?

Thanks in advance.

[stefan.becker]

Have you tried the special Dos Emulator "DosBox" directly on the host? Maybe you get better results. http://www.dosbox.com/

[vbox4me2]

http://www.tamedos.com/

[Sopalajo de Arrierez]

Have you tried the special Dos Emulator "DosBox" directly on the host? Maybe you get better results. http://www.dosbox.com/

Thanks for your suggestion, stefan.becker, but no luck . My old DOS program even does not start. When I use DOSBox it just says and gets stuck at:

Code: Select all

DOS/16M Protected Mode Run-Time     Version 6.01
Copyright (C) Tenberry Software Inc. 1987 - 1994

Of course, C: drive has benn mounted and has writing permissions, I have checked it.

[Sopalajo de Arrierez]

http://www.tamedos.com/

Thanks a lot for your help, vbox4me2. Your idea works great . Or so it seems.
The look of my DOS windows is a bit different (fonts and so on), but I believe all my problems have now disappeared using TAME DOS.

Thanks you very much.

[stefan.becker]

Have you tried the special Dos Emulator "DosBox" directly on the host? Maybe you get better results. http://www.dosbox.com/

Thanks for your suggestion, stefan.becker, but no luck . My old DOS program even does not start. When I use DOSBox it just says and gets stuck at:

Code: Select all

DOS/16M Protected Mode Run-Time     Version 6.01
Copyright (C) Tenberry Software Inc. 1987 - 1994

Of course, C: drive has benn mounted and has writing permissions, I have checked it.

Have you installed it in the guest or on the host?

[Sopalajo de Arrierez]

Have you tried the special Dos Emulator "DosBox" directly on the host? Maybe you get better results. http://www.dosbox.com/

Thanks for your suggestion, stefan.becker, but no luck . My old DOS program even does not start. When I use DOSBox it just says and gets stuck at:

Code: Select all

DOS/16M Protected Mode Run-Time     Version 6.01
Copyright (C) Tenberry Software Inc. 1987 - 1994

Of course, C: drive has benn mounted and has writing permissions, I have checked it.

Have you installed it in the guest or on the host?

In the guest, of course . The host is a Linux (Ubuntu) machine.

[stefan.becker]

Tht is the problem. DosBox has to be installed on the host. VM in VM does not work. But no problem, you have already a solution.

[Sopalajo de Arrierez]

Tht is the problem. DosBox has to be installed on the host. VM in VM does not work. But no problem, you have already a solution.

Re-reading your first post, I can see you wrote "directly on the host", indeed . I had ignored it, because my host is a Linux one, and I need to enable remote connections to the VM (I don't think this could be possible in DOSBox).

Thanks again, stefan.becker.