ISO Loader 0.6.x Beta

[pcwzrd13]

Regarding the piracy detection in Ooga Booga. Here's some info I got from the devs:

Цитата:I just took a look at the code to refresh my memory and it was really a dead simple piracy check:

if

the media had a high density table of contents and

the Dreamcast reported the media type as GDC_DISC_GDROM

then

read the boot file name (which was a 16 byte string conveniently always located at byte offset 0x582F060)

get the starting location of the boot file

make sure the boot file was past the 100th minute on the disc

If that check failed, we determined it was a pirated copy.

The reason for this simple check was that the boot file was positioned at the end of the disc for read performance. Most pirated copies were 74 or 80 minute CD-ROM images where they condensed the free space down to fit the game on one disc. They were typically played on hardware hacked Dreamcasts or using a stolen/pirated development key disc. The piracy check was only there to stop casual hackers who weren’t experienced enough to modify the byte code and circumvent the boot file check.

However, we actually created a unintended piracy deterrent when we added that “piracy detected!” screen. Smarter hackers later found our boot file logic and after showing the dancing pirate screen (for bragging rights), would let the game continue on to the title screen. Turns out, we unintentionally never freed the memory used by the dancing pirate and with so little memory on that system, the heap became over-allocated soon after during gameplay. Our code was as written as fault tolerant as possible so you could typically get into a match and start playing and everything would appear normal. After a few minutes, graphics would start glitching out, framerate would start to hitch, and the experience would degrade often time until it was totally unplayable.

This should be helpful to SWAT for bypassing this check.