Well, I don't exactly know what you want to do, but if you were thinking about starting another application (e.g., the trainer) while something is still running (e.g., the game), that will be as impossible as in real dos. dosbox is, after all, a dos emulator - with all it's limitations.

But of course, you get a dos prompt when starting dosbox, so you can run trainers before starting the game. They are used exactly like in real DOS.

@Guest: your post does not make sense. There was not ever any multitasking in normal DOS ... The only way coming a bit closer to it were resident programs (but I would not call that multitasking).
DOSBOX should work exactly as DOS.
There will not ever be any multitasking in DOSBOX (since it was not in DOS - DOS was from the start designed as single user/single task system).

Mirek

Hmm... I remember having a program to run more than one task in real dos. Can't recall it's name though. But I was able to play mp3 files and play games at the same time. It was kinda poor in speed though and often the mp3's were lagged. Anyways.. I didn't know that dos box was ment to be as real as dos as possible. Just thought it would be a nice extra feature to be able to run a trainer along with the programs. And/or perhaps other needs for a use of more than one program within the same dos shell. Oh well.. I guess I'll have to keep on dreaming. 😀

It's a great program anyways you know. Hehe.

Ehh - what prevents you from starting 2 DOSBox'es???

As I said before, if you know a program which worked on real DOS, it may also work in DosBox. Including that multitasking stuff -- but weren's trainers usually resident programs that popped up with a hotkey? Those are simply started before you run the game itself.

But really, nothing prevents you from running two (or more) DosBoxes at the same time, if you need to.

Run trainer before you run game (that's how it works in DOS)

If it's one of the original trainers for the DOS game it's almost always a TSR that you run before the game, same way a lot of the dos exe cracks work. Desqview was one of the programs that was commonly used by people to multitask in dos, but it uses some pretty crazy memory stuff, I think i'll dig out my copy and see if it runs.