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ps1 demo hacking

Posted: Tue Jun 07, 2022 7:15 pm
by jordan108
Has anyone tried to enable locked content from ps1 demo's? I have a few downloaded and I know usually there is beta content stored on demo disks you can't usually access.

I have googled searched but I found nothing on it. I know some games like gran turismo people have unlocked demo's but was wondering if it was at all possible to do it through cheat engine?

Re: ps1 demo hacking

Posted: Sun Jun 12, 2022 10:42 am
by Visual917
It is tremendously harder than hacking PC games. PS1 games are written heavily in x86 Assembler and C. You'd need to disassemble the code first and you'd need to understand Assembler code.
There is this: [Link]

There is also [Link]

HEX view of the raw code looks like this. (Without disassembly) If you're lucky, you get some human readable strings. (Texts)
Image

There are tools to hack roms for specific games like Pokemon, but they're really popular games.
Image

Aaand x86 Assembly code looks just like this. Yeah, it is one of the hardest if not the hardest period. For novice programmers, it might be a bit straight forward. But even as a backend dev, I find it nauseating.
Image

All in all, I do not think it is as simple as injecting a table. You might want to check PSX forums maybe. There are lots of C/Assembler devs there.