Hello.

I agree with you, a VM isn't a viable solution for testing.
I'm in favor  of using real hardware.

My floppies games i tested on VM run well on my IBM 286 (real machine).

The downloaded games had options that my don't have.

I do have a PII and PIII that i'll try freedos, but no anytime soon... for
now i'l stick to emulation.


On Tue, Mar 8, 2022 at 10:35 PM Eric Auer <e.a...@jpberlin.de> wrote:

>
> Hi!
>
> Please stay relaxed about this topic, it would be great to know WHY
> certain games do not work well in FreeDOS, so we can improve it :-)
>
> Of course you can also run those games in various emulators or using
> other versions of DOS. This may even provide insights regarding how
> to configure FreeDOS, another DOS, or some emulator the best way for
> the game in question. So I would not want to exclude talking about
> other DOS or emulators, but my goal would still be finding out how
> to make all games work in FreeDOS - if necessary, by pointing out
> bugs in FreeDOS.
>
> That said, in case you have Linux (not sure about the porting state
> of DOSEMU2 to Windows or other OS), could you test the games here
> with DOSEMU2 and FDPP? The FDPP module of DOSEMU2 is a port of the
> FreeDOS kernel to the Linux side of the emulator, with some glue on
> the DOS side, so it is a bit hard to compare to classic FreeDOS, but
> it has lots of patches which may have already solved the game issues
> so it would be cool to know how well the tricky games run with that.
>
> FDPP is the default "DOS" for DOSEMU2, but you can still use DOSEMU2
> like a more generic VM or emulator and install classic FreeDOS on it,
> either in a diskimage drive or in a "Linux directory posing as a DOS
> drive". The latter requires loading some special DOS drivers to gain
> write access after boot. In DOSEMU (non-2), some magic was built-in
> to provide more services without manually loading DOS drivers, so that
> just had a normal FreeDOS kernel as default guest operating system.
>
> Regarding the option of using MS DOS 6.22: That one has not been
> updated for 30 years and it fails to understand things such as
> disks beyond 8 GB (or even 0.5 GB) in size, modern amounts of RAM,
> FAT32 partitions, and so on. Plus of course it is neither free nor
> open source. So FreeDOS has many nice features which MS DOS 6.22 is
> missing, but of course games from 30 years ago have only been tested
> by their developers with DOS from 30 years ago, so there is always a
> risk that we broke compatibility in how we implement exotic APIs. As
> you mention, Win9x DOS 7.x is an option for some - but even that is
> neither free nor open source and there is no ongoing development, so
> nobody who can help you to improve it if anything is not working well
> for example on any "too modern" hardware.
>
> > Alas, FAT-32 MS-DOS introduces issues of its own with other games.
> > Starflight 1 and 2 have problems on these installed, and Tsunami Media
> > games (Man Enough, Return to Ringworld, just to name a few) refuse to run
> > completely. All these games Run flawlessly on FreeDOS.
>
> That surprises me, as a default install of FreeDOS has FAT32 enabled.
> Do those games just refuse to run when the game itself is on a FAT32
> drive? Or do they actually care about whether DOS knows about FAT32?
>
> > So you downloaded some of those games and they ran but had speed issues
> and
> > exited with error code. Then you tried your Floppy versions and you
> report
> > black screen with no errors (same as others and me included had
> reported).
> > And you tested all this between 1.3rc4 and 1.3 live on a VM.
>
> That sounds like a lot of effort in testing, but if all tests were on
> virtual machines, the problem can simply be caused by the VM itself,
> for example not properly emulating DOS age VGA graphics or SB16 etc.?
>
> Regards, Eric
>
>
>
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