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- A SIMPLE WAY TO DETECT GAME WIZARD
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- Hi! there.
-
- First, I must mention it that i'm not good at english.
- so, there is very high possibilty of using dull expression.
- namely faulty grammer and so on...
- please forgive me.
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- You know game wizard?.
- like it's name game wizard is wonderful one.
- but, for game producer especially Role style game maker.
- game wizard is an ultra-power enemy to defeat. isn't it?
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- Here is a simple C source code to detect game wizard.
- this is for you who make game program.
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- unsigned get_int_seg(int Intnum)
- {
- unsigned *IntVec=(unsigned *)0x0;
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- return(IntVec[Intnum*2+1]);
- }
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- check_wizard()
- {
- unsigned Intnum70;
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- Intnum70 = get_int_seg(0x70);
- if(intnum70==get_int_seg(0x21))return(1);
- if(Intnum70==get_int_seg(0x10))return(1);
- if(Intnum70==get_int_seg(0x13))return(1);
- if(Intnum70==get_int_seg(0x28))return(1);
- return(0);
- }
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- The idea is simple.
- when game wizard is installing in memoryal interrupt vector table.
- so all we have to is just check special interrupt vector
- table's address. especially, interrupt Segment address.
- game wizard changes interrupt number 10h,13h,21h,28h,70h and
- command line option dependent interrupt numbers.
- command line option dependent interrupt numbers are varied by option.
- but, interrupt number 10h,13h,21h,28h,70h is always changed.
- so if check interrupt number 10h,13h,21h,28h,70h segment address
- we can determine whether game wizard is in memory.
- notice interrupt number 70h.
- intercepting interrupt number 70h is characteristic.
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- This is simple way to detect game wizard.
- Usually this routine works right.
- but, After game wizard is excuted and When intercepting interrupt
- number 10h,13h,21h,28h program is staying in memory
- this routine fails!.
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- Thanks for read!.
- if you have any questions or need more info,
- then email me at easthill@nowcom.co.kr
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- Written by Yonghee Lee ( From Kwangju , Korea ) 1995.
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