Steve Nickolas

Here's some stuff I dug up while tweaking around with Lode Runner. You'll
need a disk image of the game itself for it to work very much, and I'm
still poking around to find stuff.

http://xtra.usotsuki.info/lrrl.zip

"postmortem.bin", which is a RAM dump, is the most important piece here.
There is also a packed version that loads as a file. They only contain
the code, not the data.

Well, I know how the data is stored, and it's easy as cake.

http://www.brutaldeluxe.fr/crack/LODERUNNER.DSK

The data is stored in DOS Order, starting from Track 3 Sector 0, one level
per sector. Level "151" is blank, and "152-154" contain the 3 levels that
are looped in the demonstration. 155 contains garbage and that's end of
data.

Being that I made this editor - http://xtra.usotsuki.info/lodehax.dsk.gz
it may be possible to compact the code further by removing the one in the
program. (Mine uses Flex Type.)

-uso.

Steve Nickolas

Replying to myself.

I'm thinking that the ideal would be to just use a partial disk image,
tracks 0-16, and do a "patch on the fly" - which would also allow me to
make it require the actual Lode Runner disk initially, with a tool to
extract the data (a little CYA).

It looks like it uses a fairly stock RWTS, at least in this crack. Man, I
keep running into RWTS and I've still failed to grasp it, but it's
everywhere I gotta be. >_<

-uso.

Antoine Vignau

http://www.hackzapple.com/phpBB2/viewtopic.php?t=191 is the key to
where program and data are stored.

Antoine "LoGo"

Steve Nickolas

On Tue, 10 Jan 2012, Antoine Vignau wrote:

> http://www.hackzapple.com/phpBB2/viewtopic.php?t=191 is the key to
> where program and data are stored.
>
> Antoine "LoGo"
>

Hm. I managed to track down part of a function that calls into the RWTS,
but...all I found was INIT. - The code is at 8E00. I'm not seeing
anything else interesting yet... :/

-uso.