Cheat Engine

[esco]

Wussup, I'm Esco. I'm totally new to this cheat engine program, but I have to say it seems to be a VERY VERY useful cheat/hacking program. Anyways, on to what's goin down with me:

I'm at the moment working on a hack for Castlevania: SOTN for the psx. I've found the memory addresses for just about everything in Alucard's game and most of the stuff in Richter's game as well. I can change stuff from weapons to sub weapon power, to text, to even enemies and the things they drop, etc. etc. I even fixed richter's flame whip and got the hatch at the beginning of the game to open.

I've been using an emulator called Epsxe and it's cheat device called [PEC]Chu. Now I WAS just gonna write a bunch of cheats into the cheat device and execute them to do what I want in the game... but sadly pec chu seems to limit me to about 320 lines of code running at once. That's how much it took me just to edit the intro stage (RIchter's attack stats, and properties, Dracula form 1 new attack, being able to only hit Dracula 2's head now, the adjust starting stat properties for Alucard, etc.), so I tried other hacking utilities and Cheat engine seems to be the most versatile.

My PROBLEM IS THIS: I am new to ASM, so I've read up on a few tutorials, and since I have experience with c programming I understand most of the terms. The only terms I think I will need to use would be these:

*If then and while do statements (Jmp and cmp it seems for asm)
*Writing in new values (The Mov statement it seems)
And a way to copy things from one memory spot to another

But I'm having a problem writing proper scripts for things in cheat device.

1) I don't understand WHERE exactly I'm supposed to put my codes in the games memory without damaging something, I would assume somewhere empty. But how do I know a memory space is empty and unused and that putting a code there won't screw something else up?

and

2) I don't know what registers start where. I understand that I will be using the 32 bit registers, but when I look in the program it doesn't indicate where they start or end. They all say 00000000 on the right hand side. Can comeone explain this to me?

Ex: I know mov[eax], af means copy the value in af to eax... but I don't know what memory #'s eax and af are.... can someone please, PLEASE explain this to me. The whole castlevania community is waiting on this project, and I can't do anymore work until I understand this. Thanks.[/b]

[esco]

Alright, let me post an example of some of the stuff I'm gonna do. In pseudocode:

Ex 1: Alchemy: Conversion of some items to a new one:

Dracula Tunic
if clothtunic#=99 and darkcrystal#=1
then draculatunic#=1
clothtunic#=clothtunic#-99
darkcrystal#=darkcrystal#-1
end if

Ex 2: Richter's stat increase

NOTE: (bronze armor=+1 to def)

if bronzearmor#=1 then
Richterdef=richterdef+1
bronzearmor#=bronzearmor#-1
end if

that's the type of stuff I want to do with cheat engine. Since my emulators cheat device can't seem to do them do to it's limitations (it's as limited as a gameshark basically).

EDIT: Also canm someone tell me how to save the values I change to a file. I notice that at the bottom I can of course put in the addresses, and change thevalues and even save a file. But when I reload the file, the memory values have reset to what's in the game. Is there a way I can save the addresses WITH the values I change them to, so I can just reload them later?

AND yes, I have picked freeze, but if I reset the game and close cheat hacker, then I have to reopen and reset all the values and refreeze them. How do I avoid doing this every time I tunr back on my computer, and load everything back up?

[Glest]