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Re: Exomizer: How is the *world* do you get it to work??

On Thu, 3 May 2012, zyzzle wrote:


Brilliant work on Plasmania, and many thanks! Yep, I couldn't find a
place for the depacker, either! And finding that non-fastloader
version was great also, I had only ever seen fastloader versions.


*^^*


Couple of other observations:

Your crunched version of Mr. Do only allows completion of the first
three levels. After completing the 3rd screen, the game simply exits
to the title page (player selection). BTW: I've only ever seen full-
disk versions of Mr. Do. In working your magic to get it single-load,
did you lop off some code somewhere?


I didn't... someone else made the single-file version.


Another challenge: I can't the game Night Stalker crunched:

ftp://ftp.apple.asimov.net/pub/apple_II/images/games/file_based/fireandice_hero_herocheat_nightstalker.dsk.gz

At least the 177 sector version on that .dsk image. It contains a
loader at $804 which does several memory moves, after having loaded
all the code into memory. It seems the text screen is used, as the
game JMPS to $400 after loading. Again, the problem is I can't find a
place to put the decompressor apple crunch code. Any help there?

I got Minotaur single-load and crunched, and it uses the same file-
load routine as Night Stalker (a 252-byte stub loaded at $804,
followed by loading the rest of the code).


The Fastloader is hell to reverse engineer.
I might try to give Night Stalker a look later. I just woke up and my back hurts like hell so I'm not in the mood for heavy thinking right now, but maybe when I'm a bit more awake. This kind of stuff does interest me. xD
One thing I've done on occasion is set a memory trap (used to use dapple for this, now I use applewin), backtrace a bit, then retry with another memory trap and dump the 48K image to a file, which I examine to see how much I need to save, then I write a wrapper around it. I did that with a crack of Gertrude's Puzzles. (Gertrude's Secrets used a more typical style of multistage single-load and I was able to one-file that much more easily.) 

-uso.