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