virtualbox.org

Hello everyone,
I have a VM running OS2 (necessary for work), and I would like to add a COM port.

I manage to configure it for communication with my equipment, but when I need to send or receive data, I experience a disconnection after a certain period of time. I can restart it, and with a bit of luck (which is rare), I manage to resume where I left off.

I no longer have this issue with version 5.2.28; however, I am unable to install it on Windows 11.
Do you have a solution for me?

Thank you for advance

Do you mean that it worked with 5.2.28 but doesn't work with a more recent version? Is it possible you know which is the first version where it stopped working?

The code changed completely in version 6.

Older programs running on DOS or OS/2 experience RS232 communication issues with VirtualBox v6 and v7.

I investigated the programs I was using (which employ unbuffered communication via interrupts) and believe the issue lies in the enabling/disabling of those interrupts as they do not reach the guest operating system.
https://www.virtualbox.org/ticket/18668

However, issues related to buffered communication have also been reported on the fórum, so the problem could be that the RS232 status information is not reaching the guest operating system correctly.
viewtopic.php?p=556569

Someone on this forum found some solutions and wants to test them... The issue is whether the VirtualBox developers can find the time to verify the changes and fix the RS232 problems.
viewtopic.php?p=558463