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Help With Fireball with one charge.
Discussion on Help With Fireball with one charge. within the Mabinogi forum part of the MMORPGs category.
12/04/2009, 18:17
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#1
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Help With Fireball with one charge.
Hi, I was playing around with the skill.dll in mabinogi and i think i found something related to fireball without the 5 charges, i know there's a version released already but i like to figure how things work out by myself. 
So... anyways i don't understand this part
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text:100432B2 test al, al
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i know its somehow testing/comparing something. can i just change test to NOP or JMP. I'm new to this so sorry if it doesn't make much sense.
and...
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it's defiantly testing something. Al could be the storage of something and the 5 must be how much you need to cast right? 
anyways I'd like it if you could help me out or just push (not spoon-feed) me in the right direction
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12/04/2009, 18:42
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#2
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You almost have it. Just use your brain. Think think.
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12/04/2009, 19:11
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#3
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The function of Test for you direct from the art of assembly book:
Another important use of the test instruction is to efficiently compare a register against zero. The following test instruction sets the zero flag if and only if ax contains zero (anything anded with itself produces its original value; this sets the zero flag only if that value is zero):
test ax, ax
As for what CMP does is it compares the value of the al register to 5, usually followed by a jump if that value matches.
You do seem to be really close though, this is some of the easier ASM to understand.
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12/04/2009, 19:36
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#4
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Look at the line directly below the CMP line, it'll be Jump IF condition is met.
You just want to jump regardless of any condition.
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12/04/2009, 20:22
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#5
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Ok so i know now that AL = 0. so I looked around a little more and found another register, which is AH. I googles and i found
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(AH contains the high byte of AX?)<-- kinda don't get that.
And looked a little deeper to find out that AX is a General-Purpose Register, which is mostly used for calculations and for input/output (so this must be the input for the user(me)) below that is a JP (It jumps if there is parity or if the parity is even?) so I pretty much get the function (i think) now i should fill it with NOP's but i don't know how to do it on IDA... can someone help with that part please? Thanks in advance.
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12/04/2009, 21:08
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#6
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Quote:
Originally Posted by wossen
Ok so i know now that AL = 0. so I looked around a little more and found another register, which is AH. I googles and i found
(AH contains the high byte of AX?)<-- kinda don't get that.
And looked a little deeper to find out that AX is a General-Purpose Register, which is mostly used for calculations and for input/output (so this must be the input for the user(me)) below that is a JP (It jumps if there is parity or if the parity is even?) so I pretty much get the function (i think) now i should fill it with NOP's but i don't know how to do it on IDA... can someone help with that part please? Thanks in advance.
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^Talk to me in pm.
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12/04/2009, 21:38
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#7
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We are starting to get more Coders and less Leechers.
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12/04/2009, 21:59
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#8
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Quote:
Originally Posted by Dark Raccoon
We are starting to get more Coders and less Leechers. |
I think we're getting more coders and even more leechers o.o...
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12/04/2009, 22:01
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#9
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Quote:
Originally Posted by Dark Raccoon
We are starting to get more Coders and less Leechers. |
QFT
but I'm still a leecher :<
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12/04/2009, 22:02
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#10
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12/05/2009, 05:28
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#11
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Quote:
Originally Posted by Dark Raccoon
We are starting to get more Coders and less Leechers. |
And the same amount of Lurkers!
Where's that Checkerbox fellow, he's probably lurking too.
I've still yet to contribute since I more or less just watch to see what's happening, I don't even PE, it's lame.
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12/05/2009, 05:38
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#12
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Quote:
Originally Posted by Kefkai
And the same amount of Lurkers!
Where's that Checkerbox fellow, he's probably lurking too.
I've still yet to contribute since I more or less just watch to see what's happening, I don't even PE, it's lame.
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And more people getting a clue.
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12/05/2009, 05:57
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#13
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#Closed, Guide was posted.
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