Hi,

> On Jan 17, 2025, at 6:54 AM, Eric Auer via Freedos-devel 
> <freedos-devel@lists.sourceforge.net> wrote:
> [..]
> PS: Some games apparently worked in older but fail in newer VBox?

The new VirtualBox 7.x series is very problematic with DOS… Sometimes.

First, I’ll say that I have not noticed any issues with VirtualBox 7.x on my 
Linux machine.

I do not often the Linux machine to run DOS in VirtualBox. 

But, I have run FreeDOS there and did not notice any problems.

My primary computer is an 8-core Intel Mac Trashcan and is a completely 
different story. 

When I had VirtualBox 7.x running on that Mac, there were several issues.

While there was no “problem" installing FreeDOS T241x, it felt very slow.

After installing FreeDOS, I experienced numerous JEMM exceptions. 

I was left with the impression that anything that used protected mode (like 
CWSDMPI) would crash.

Time was limited. So, I did not test it thoroughly. I simply removed 7.x and 
went back to the latest 6.x version.

All memory issues went away and the installed FreeDOS was many times faster.

I have not tried later versions of VirtualBox 7.x. 

On a side note… 

There were definitely changes to the emulated BIOS going from 6.x to 7.x.
Initially with 7.x, the V8Power Tools’ VINFO command did not detect the VM as 
VirtualBox.
I had to update that tool to detect the new 7.x series. (Then, I rolled back to 
the working version.)

:-)

Jerome







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