Cheat Engine

Zephiles · Posted: Tue Jun 14, 2016 10:29 pm Post subject: CE Request

Since Cheat Engine cannot handle results that are bigger than 4 bytes, I was wondering if this would be a possibility:

The current addresses that I am looking at are 8 bytes long and are in the form of Big Endian. They are used to handle the main clock in the game. Because of this, I was wondering if a custom type could be made that would take these 8 bytes and then convert them into minutes.

An example would be that if the clock was currently at 10:45 (10 hours 45 minutes), then the displayed time in Cheat Engine would be 645. So can this sort of thing be done?

Edit: Something similar to this has been done by mgr.inz.Player. This is what he has:

Zephiles · Posted: Mon Jun 20, 2016 4:55 pm Post subject:

Since I'm not getting any responses, is it safe to assume this isn't doable?

Dark Byte · Posted: Mon Jun 20, 2016 5:36 pm Post subject:

it can be done. just as you said, convert it to a human readable value.

ParkourPenguin · Posted: Mon Jun 20, 2016 6:08 pm Post subject:

You can read from & write to that address directly using the bytes, right? Use Lua or even asm to convert it to/from whatever type of value you want.

If you would like someone else to do this, provide more information. Namely, the function that relates that qword to the actual time. If you don't know how to get that, copy and paste a dozen or so states approximately evenly distributed across the full range of values (with respect to either the time in the game or that qword) including that qword, the time it is in the game, and what you want the displayed value to be.

Zephiles · Posted: Sat Jun 25, 2016 5:02 pm Post subject:

After getting help from some people, I have figured out that the clock speed of the game that I am using this for is 40,500,000/sec, or 2,430,000,000/min. So basically, for the custom type that I am requesting, you would just need to calculate the current value in 8 Byte Big Endian, and then divide the result by 2430000000.

I would assume you would only need to edit the current 4 Byte Big Endian custom type a bit to calculate for 8 bytes instead of 4, and then add in the division afterwards.

Since it's apparently this simple, is any additional information required to make this custom type? I would attempt to make this myself, but I really don't have a clue how to do it.

ParkourPenguin · Posted: Sat Jun 25, 2016 6:16 pm Post subject:

As has already been said in a previous topic of yours (among other topics), custom types cannot completely support value types larger than 4 bytes.
Here's a couple Lua functions that will do what you want.

Zephiles · Posted: Sat Jun 25, 2016 7:13 pm Post subject:

OK, so how exactly do I use these functions with my table?

ParkourPenguin · Posted: Sat Jun 25, 2016 8:32 pm Post subject:

Any way you want (using Lua).

Zephiles · Posted: Sat Jun 25, 2016 9:59 pm Post subject:

Ok I ran the script earlier and it worked, but now it's not working. I'm getting an error every time I try to run the script now. I have no idea what went wrong. This is what it says:

Error:[string "autoAssemble("globalalloc(timeMinutes, Cool

")..."]:8: attempt to call a nil value (global 'readTimeMinutes')

And it keeps looping this until i forcefully close it via task manager.

panraven · Posted: Sat Jun 25, 2016 10:10 pm Post subject:

4byte most positive number is 0x7fffffff, which is 2147483647.

If the time usage is within 0-2147days range, the 8bytes value can be express like 2147 days 23hr 59min 59sec as 2147235959 (2147*24*60*60-1 = 0xb0fd5ff ) as largest expressed value.

The point is we don't need to express the custom type result 4byte into all the 8byte possible range with low precision (ie. cut the lower 4bytes, or divide 2430000000 ), we can limit the possible range so that the result type can be fit into 4byte acoording to usage with good precision of 1sec.
The valid 8byte range with highest ~2147day and 1 sec precision is roughly 0xb0fd600 x 40500000 = 0x 1AB404 AECCC000, within 8byte range . For 8byte value higher than this number, we can treat it as invalid value.

ParkourPenguin · Posted: Sat Jun 25, 2016 10:25 pm Post subject:

Zephiles · Posted: Sat Jun 25, 2016 10:51 pm Post subject:

ParkourPenguin whenever I close the game, I also get that error. Is there any way to prevent that?

And panraven, thanks for your custom type as well!

ParkourPenguin · Posted: Sun Jun 26, 2016 8:57 am Post subject:

You aren't getting that exact same error since those functions are still defined, but it will fail when it tries to look up values belonging to the process.

Zephiles · Posted: Sun Jun 26, 2016 12:32 pm Post subject:

Alright this works, but now there's just one small problem left.

If I reopen the game and execute the script again, the previous value that was in the address will not be reset/cleared.

ParkourPenguin · Posted: Sun Jun 26, 2016 12:35 pm Post subject: