Error on attempting to start Dos App

[Amit Wolf]

Hello all!

I've been given the unforgiving task of running an old Dos App at my office, after trying a few other emulators, i decided to try out vDos because the app needs to print files and it seems that this emulator handles printing rather well. 

long story short, i cant get the app to open, i keep getting an error when i try and run the batch file, the error:

Error name: "vDos - Exception"

content: "JMP: illegal descriptor type 1"


important notes (some might be unrelated):

- The app did work for me on the dosbox emulator, so it should work.
- dont know if it matters, but the app only worked on dosbox after i configured the .conf file like so:
xms=false

ems=true

umb=false

tried googling the error but couldnt find my problem exactly, and even if it was close, the solution wasn't clear, anyways, thanks in advance for your help. 

Amit Wolf.

[Jos]

That error indicates the program tries to perform an illegal jump while running in protected mode.
I could have a look at the program, but protected mode programs can be real complicated.

Jos

[Amit Wolf]

so your saying i wont be able to run it on vDos?

[Jos]

That could very well be, the change to find the direct cause and a solution will be less than 50%.

Jos

[emendelson]

Under DOSBox, you may be able to print by using this clumsy workaround:

www.vogons.org/viewtopic.php?f=32&t=53526

But your application will need to be able to "print" to a filename. (Or you can patch the application itself to replace the string "LPT1" or "LPT1:" with another string as discussed in the thread linked to that post on the DOSBox forum.)