Apventure to Atlantis on IIgs

[fadden@uts.amdahl.com (Andy McFadden)]

A few days ago a bought Apventure to Atlantis (an old Apple II game) through
the net.  When I tried to boot it up on my IIgs, it crashed.

What I discovered was that the object files expect the carry to be set when
they are run.  If the carry is clear, they will crash.  Somehow, "BRUN"
was supposed to launch the next program with the carry set, but this isn't
happening on my IIgs.

I got a fully working (as far as I can tell - first island, ornithopter
operations, buildings on islands) version by sticking a "SEC" at the start
of each file, then BSAVEing them at address-1 with length+1.  Had some junk
on the screen the first time I took off in the ornithopter, but otherwise
it worked fine.

Has anybody else had this problem, or is it just me?  As far as I can tell
the disk is undamaged and unmodified.  Attempting to get a catalog listing
with their DOS puts up a copyright message with a warning.  I was able to
get the hacked version to work with DOS Master on a 3.5" disk, which is
nice since the disk is copy-protected (presumably the protection is what's
causing me grief... the code that expects the carry to be set is most
definitely an attempt at obfuscation).

(Incidentally, you can look at the stuff on the disk by doing:

] call-151
* b942:18
* <ctrl-C>

after booting DOS 3.3.  That will ignore the modified disk formatting.)

If you've found another way to get this to work, or have been playing
it on a IIgs without problems, please send me e-mail.  Thanks.

--
fadden@amdahl.com (Andy McFadden)  [These are my opinions, not Amdahl policies]

	  You get what you pay for, if you know what you are doing.
 PGP		    Otherwise, you get what you deserve.		 RIPEM