IPF file of Double Dragon 2 without copy protection

[TCD]

Originally Posted by gimbal

How to identify Algorithmic Insanity: comma comma comma comma comma comma comma.

We could call the poem a commata.

[Lewis]

Originally Posted by kremiso

my god, this required a lot of work back then

its not just a copy protection track, the entire disk is a wasp nest
the Whdload page has a lot of useful infos, like always

ie this cut :

66 x Encrypted files
66 x Encrypted protection check code in each file
4 x Loaders (encrypted/non-encrypted) in code file
13 x Routines to access loader (activated by an address error!)
3 x Checksums (testing and shifting data on the stack)
1 x In game loader that decrypts when called, then re-encrypts itself after!
1 x MFM filesystem with $1800 data blocks the wrong way around
1 x protection track that was tested more times than Ben Johnson
1 x encrypted bootblock loader
235 x address errors, in Mr.Aplins vain attempt to 'disguise' his code!
16 x address errors in the copperlist

THAT.... was just the protection! Never mind getting down to the actual job of
fixing the fucking game!

Its at least inventive, but why did Mr.Aplin decide he needed to disguise every access
to a custom register, no matter how mundane the operation?

This is a case of a copy protection too far. The game doesn't work on AGA Amiga's because
of the stupid levels of copy protection, the game code itself is generally fine.

The way the code operates, meant that every piece of protection had to be removed BEFORE I
could even start fixing it for WHDLoad!

I remember Richard Aplin bragging about how tricky this protection was. Access fault city
aside, it took me 4 hours to pick apart the filesystem, have code to decrypt and disable
their protection checks, and remove the ingame protection checks, perhaps if the protection
wasn't so formulaic (i.e. address error for every access to the loader, and 'RA89' as a
decrypt key!!) then it might have been of some use.

To quote: Another attempt by Mr.Aplin!

Kindest Regards, Galahad of Fairlight

Retro DENUVO hahaha