Microsoft has been warning about this for decades. I have never seen this happen with the default SYSTEM.CB.
You can try installing the SVGA or XGA Safe Mode files and Patches. Maybe one of them will work.

30 minutes ago, rloew said:

Microsoft has been warning about this for decades. I have never seen this happen with the default SYSTEM.CB.

Warning about what, exactly?

Cheers and Regards

 

That using a DOS shell in Safe Mode can cause video corruption.

You can try starting Windows in Safe Mode using these extra debugging options:

  WIN /D:MSX

I checked SIV->Graphics report, i could be problem, that there are not listed 1 and 4 bit modes? So no 2 and 16 color mode in the driver?

   I dont understand, how is text modes embedded into normal VGA mode (if all data are rendered as graphical standard VGA mode), but if its something like Picture in Picture (in games we are name it embeded viewport - 2 rendering areas in 1 view) - this could be why its not working.

  I found info in SIV by accident.. On system were is working table looks like this(picture) and on systems were is not working are no check on 1 a 4 bit column..

Quote

You can try installing the SVGA or XGA Safe Mode files and Patches. Maybe one of them will work.

  What exactly and i need to add into system.cb for that?

Try the "Improving Windows 98 / safe mode" thread in the member projects section.

I only want to clarify that fix it by replacing GPU for moment is working, i used more modern GPU, installed VBE and command.com was working.. 

Edited August 26, 20179 yr by ruthan

Can someone pleas check command.com with other Nvidia cards and their drivers / monitors? I know to know which configuration should be avoided and which are ok.