extracting a trainer

[Asle]

Hi,

Not sure it's the right conf, but I guess it'll requiere some coder's skills, so ...
Ok, I've attached "trainer.lha" which contains "3" (the trainer packed with Tetrapack 2.2) and "game.stg" the requiered external file from DF0:.
Obviously, this external file is irrelevent for the trainer itself as I'm only interrested by the intro. Could someone, here, have a look and, somehow, manage to extra the intro, here ?
The string "game.stg" is right at the end of "3".

Thanks in advance.
Kind regards,
Sylvain

[heavy]

hmm...intro is depacked at a fix address 65000
get a disassembler/debugger/monitor:
put at 65000:
bra $65022 ; skip game loader, goto intro

and change prog at $650d4 (trainer) to restore system copperlist (old way):
move.l 4.w,a6
lea $70000,a1 ; graphics.library
jsr -408(a6) ; open gfx lib
move.l d0,a1
move.l 38(a1),$dff080
jsr -414(a6) ; close gfx lib
movem.l (sp)+,d0-a6
moveq.l #0,d0
rts

and set at 70000 :
dc.b "graphics.library",0

now trainer works alone but it's not yet executable
you have to recrunch it at original fix address or add good hunks to make an exe

[Asle]

thanks for this fast reply

[heavy]

missing : set at 70000 :
dc.b "graphics.library",0

[heavy]

you get an exe like this (®cf):

[Asle]

Thanks for the file !