Cheat Engine

Mystic974 · How do I cheat? Reputation: 0 Joined: 27 May 2020 Posts: 8

Hello,I'm a total beginner in coding/using cheat engine,I've read many guides but I'm still confused.And there im stuck with a problem.

I'm playing Dynasty Warriors 3 Xtreme legend on PCSX2 and have a cheat table,most of the scripts works,but one that I absolutely want simply don't...

Please I need help step by step to solve that issue...

My cheat engine version : 7.0

Thank you all in advance

AylinCE · Posted: Wed May 27, 2020 5:41 pm Post subject:

Do the stars have any meaning?

Mystic974 · How do I cheat? Reputation: 0 Joined: 27 May 2020 Posts: 8

Thanks for the repply ! Well I don't know,someone gave me this cheat table like that :/ But it's not a problem for the other scripts that look similar to the one on the screenshot,with the stars ,and they works fine.

EDIT : I tried to replace each stars with "??",and I had the same error that popped up Sad

Corroder · Posted: Wed May 27, 2020 7:50 pm Post subject:

How with adding preserve memory allocation?

ParkourPenguin · Posted: Wed May 27, 2020 8:25 pm Post subject:

Asterisks can be used as wildcards too.

Allocating more memory for newmem won't fix the aobscan pattern not being found. It's not like those few instructions come anywhere near 0x500 bytes anyway.

If the emulator uses jit compilation, you may need to play the game and do different actions in the game to get the correct code to compile.
Otherwise, find the new injection point. Maybe it still accesses pcsx2.exe+4C0230: add that address to the address list and look at what accesses it.

Even if you do get it working, I have no idea what that injection is supposed to do. All it does is replace a character with a null byte. There's nowhere to specify a name- just a single character.

Mystic974 · How do I cheat? Reputation: 0 Joined: 27 May 2020 Posts: 8

atom0s · Posted: Thu May 28, 2020 5:49 pm Post subject:

This is not Lua related; moved to proper section.

Mystic974 · How do I cheat? Reputation: 0 Joined: 27 May 2020 Posts: 8

ParkourPenguin · Posted: Thu May 28, 2020 11:21 pm Post subject:

Without more information on the code in the original injection point it could be hard to find it.

If you can find this 0-255 value, look at what instructions write to it and you should find something to use as an injection point.

Scanning for fewer bytes of the original injection point might work, but you don't have much to go on.
In the main window, set the scan type to array of bytes, clear the writable checkbox, check the executable checkbox, grey the CoW checkbox, scan for "88 11 A1", and for all the results in the exe, do to that address in the disassembler and check to see if it looks like it could be the injection point ("find out what addresses this instruction accesses" on "mov [ecx],dl"). If that fails, try "88 ?? A1". Scanning for "05 90 00 00 00" and scrolling up a bit in the disassembler might work too.

Mystic974 · How do I cheat? Reputation: 0 Joined: 27 May 2020 Posts: 8

ParkourPenguin · Posted: Fri May 29, 2020 11:20 am Post subject:

That's in WindowsCodes.dll, not pcsx2.exe. I strongly doubt that's the correct injection point.

Try "88 ?? A1", or try "05 90 00 00 00" and scroll up a bit in the disassembler.

Mystic974 · How do I cheat? Reputation: 0 Joined: 27 May 2020 Posts: 8

ParkourPenguin · Posted: Fri May 29, 2020 12:31 pm Post subject:

For all the addresses in the exe (they'll all be about in the same region), go through each one and check:

That instruction is of the form "mov [e??],??"
Those bytes are aligned to an instruction - scroll up a bit in the disassembler then scroll back down. If the instruction disappears, those bytes probably weren't aligned
Right click the "mov [e??],??" instruction and select "Find out what addresses this instruction accesses". If the address you're looking for pops up, that's probably the original injection point.

Remember to first scroll up a bit for the "05 90 00 00 00" pattern.

If you still can't find it, you probably aren't ever going to. Instead, try to find that 0-255 byte value and check what writes to it. I don't know how you'd find that value- you'd need to figure that out.

Mystic974 · How do I cheat? Reputation: 0 Joined: 27 May 2020 Posts: 8

ParkourPenguin · Posted: Fri May 29, 2020 7:17 pm Post subject:

You might need to do some action in the game in order for code to run and have something come up in the "accessed addresses" window. I'm not sure what that action would be... opening a menu? Perhaps when bodyguards spawn?

Narrowing it down to only 5 is good. You could set a breakpoint at each of them (highlight instruction, Debug -> Set breakpoint), play the game for a while, and if it suddenly stops working, go to CE and see what instruction triggered the breakpoint. If a breakpoint triggers too often and it's never what you're looking for, remove the breakpoint- it's probably not the correct instruction.
Or watch the accessed addresses of all 5, but you'd need to remember to check if anything comes up while playing.