Just replacing the COMMAND and SYS files won’t really give you 1.2. It would
just be 1.1 an upgraded kernel. Take a look at the software comparison chart
on the official FreeDOS software repository. 


It shows what is included in 1.0, 1,1 and the 1.2 variations. Also, it shows the
versions that are on the repo. 

Since you probably don’t have a supported NIC in the dedicated machine,
you may even consider installing 1.2 via the repo CD. The CD image is built 
automatically daily, when a package is updated on the repo.


The FreeDOS 1.2 installer will backup your config files. Also, if the new 
directory (C:\FDOS), already exists, it will also backup and replace it. So, 
sure you have plenty of free disk space.

However, that assume everything works as designed and nothing goes wrong. 
I highly recommend you create your own backup of anything important.

The first step in that process would be to make a known good bootable backup.
Format a floppy and preform a sys transfer to that diskette. That way you can
easily boot that floppy and restore your kernel. I would also copy your current
autoexec.bat and config.sys to a directory on the floppy along with any drivers
you may require.

Also, please be sure you have good backups for any games you have. I wouldn’t
expect any serious problems. But, you never know. On top of that, a hard drive
can go bad or even completely fail without warning. 


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