You should ask who you bought iDos/DosPad from for help.

collector wrote:

You should ask who you bought iDos/DosPad from for help.

I did. But those forums are almost dead. I even sent a message to the dude who posted the video of Syndicate running on iPad. If someone here can help me in any way, please tell. I'm open to suggestions.

If you have it running coreectly with dosbox on a pc, you will need to adapt the paths inthe ipad cfg file. So the mountings look the same.
Especially taking the android cfg file for the ios version is a no go because you screwed your c mounting already (there is no such thing as sdcard to mount).
So fix that, best by reinstalling idos.
Then copy/paste the autoexec part of the cfg and the autoexec part of the working dosbox for windows and I csn help you

Thank you for the suggestion. You were right about the Android bits in the cfg file-I got this cfg file when I was trying to run Fallout and its been my default cfg ever since. Unfortunately, this did not help. I removed the exec part of the cfg file, reinstalled iDos-all the same.Tinkered around with the cfg file, entering values and parameters from the cfg of the Syndicate DosBox one by one. Even tried adding parameters that I hardly understand (XMS, EMS, UMB). I'm starting to think it has nothing to do with the cfg file. I got Syndicate running on both the DosBox that comes with the GOG version and vanilla DosBox that has no [autoexec] parameters entered. Is there any reason why the files of this particular game are not visible to iDos for some reason?

Yes, the reason are most likely that the mountings do not match.
For example if syndicate is on c:/dosgames/synd on your pc and to start the game you do this in dosbox:
Mount c c:/dosgames
C:
Cd synd
Game.exe (I have no idea about the exe of the game 😉)

Syndicate got installed to c:/synd and assumes its game files there.

If you now put the whole folder c:/dosgames onto the idos folder it mounts as c: you have a problem.
Because then the c folder structure *IN* dosbox doesn't match anymore.
If you have to do anything different in idos than in the PC after the mounting then that's what you need to fix.

For example:
Mount c somefolderonios (idos does that on its own)
C:
Cd dosgames/synd
Game.exe

Notice the different cd command? There is the problem.
That's why I told you to give me both mount c commands on PC and iDos.

Sorry, I misunderstood about the copy/paste thing. Here are the parameters:

GOG DosBox:
[autoexec]
@echo off
mount C "."
c:
cls
@main >nul: /iirq7 /idma1 /iio$220 /c0
exit

But the game runs perfectly in vanilla DosBox with simple mounting.
The location of the Syndicate files on the iPad is in /var/mobile/Documents/Synd/. iOS apparently doesn't have drive names and when mounting I just start with /var/. Seems to work.
DosPad starts with drives C and D mounted as /var/mobile/Documents/. iDOS starts with drive C mounted as /var/mobile/Applications/BB36CDC1-C86C-4695-A37B-A225806C06FA/Documents/. The long code is the app name in iOS. But both iFile and iTools convert the code to app names for better orientation.

Thank you for taking your time helping me.

Ok, looks as if GOG mounts the game folder as c: and that's what you will need to do in ipad/dospad as well. Change the mount c to mount .../documents/synd and then start the game.
Or you will need to find where the game stores its paths but that may not be an easy textfile (often something like synd.cfg or so)

Finally got Syndicate to work. I'm ashamed to admit how-the permissons on the files apparently were wrong. I thought that changing the permissons on the folder affected the files but apparently that wasn't the case. What followed this revelelation was a manual change of permissions of 400+ files. But it was worth it.
Thank you guys for helping me figure this out. Thank you Dominus. You're the man!

Damn! I forgot about the permissions problem. I ran into this myself but it's been a while since I last did anything with idos/dospad. That's why it's best to put the games in a zip and then let idos unzip it.
Got to remember this 😉
Great you got it working!