Seems like another problem with protected mode. This game tries to switch the CPU to protected mode using the (currently) unsupported function int 15, ah=0x89
My guess is that the program thinks it is in protected mode, although it still is in real mode. And if you try to start it again after you get that error, dosbox crashes ("GRP5:Illegal call 7")

just why did every company back then have to build their own dos extender 🙁

--Darkstar

Yeah awfull. Why use a dosextender at all 😀
Just write good code and switch to protected mode by the well described mov cr, .....
jump ....

😀

Hi there!

I happen to be the programmer of a game called Interpose (released in 1996). The game uses the same dos extender as Pinball Illusion. I might be able to help you out. I'm also very interested in getting Interpose to work with DosBox.

I can't get hold of the Dos Extender author (Stein Norheim), but I have the source code for Interpose, and that should help. I might also have some more stuff. I will look through old backups.

Send me an e-mail if I can help: mer@enonic.com

best regards,
Morten Eriksen
Twilight Zone Software (not an active company)

Hey Qbix, there's someone that can answer your question, 😅

You're right Snover 😀

I'll contact the good man 😀

Hi!

I just found this discussion, and it seems I am the one to blame about the Int15h call... If it still is of interest, I can provide you with the source code of the dos extender we used back then.

cheers,
Stein Norheim
FrontLine Design (inactive)

stein_at_abc_dot_se

well the bios way of going to protected mode was allready added. (after emailing a bit with Morten Eriksen)
interpose works perfectly.
Didn't try the pinball illisions game though.