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debug
o 70 2e
o 71 00
o 70 2f
o 71 00
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//AMIPWD.CPP --- Show AMI Password String
//Compile with SMALL model Tel:027-7800172 7404402(H)
//Email:mecad@server20.hust.edu.cn
#include
#include
#define BYTE unsigned char
char AMI_unEncrypt( BYTE key,BYTE c2){
asm xor di,di
asm mov bl,key
asm mov cl,c2
lab1:
asm test bl,0xc3
asm jpe lab2
asm stc
lab2:
asm rcr bl,1
asm inc di
asm cmp bl,cl
asm jne lab1:
return _DI;
}
BYTE rbyte(int port){
outp(0x70,port);
outp(0xed, port);
return inp(0x71);
}
// 0x38-3d password code 0x37 initial value
void main(){
int i, length;
static BYTE secret£Û7£Ý;
char str£Û22£Ý="";
for(length=0; length<7; length++)
secret£Ûlength£Ý = rbyte(0x37+length);
secret£Û0£Ý &= 0xf0;
for(i=0; i<7 ,secret£Ûi+1£Ý>0; i++)
str£Ûi£Ý = AMI_unEncrypt(secret£Ûi£Ý, secret£Ûi+1£Ý);
str£Ûi+1£Ý=0;
if (secret£Û1£Ý==0)
printf("No password\n");
else
printf("Password=%s\n",str);
return;
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ǰÊöÕë¶ÔAMIÖ÷°åµÄBIOS¿ÚÁîÆÆÒëËã·¨ÔÚBIOSÈÕÆÚΪ91.5.5, 91.7.7, 91.12.12,92.6.6ºÍ92.11.11µÄ΢»úÉϲâÊÔͨ¹ý. Ϊ±ãÓÚÀí½â,½«½âÃÜËã·¨µÄC´úÂëÁгö:
char AMI_unEncrypt( BYTE key,BYTE c2){
BYTE num£Û£Ý={ 0,1,1,2 };
int di=0,c;
do{
c=num£Ûkey>>6£Ý+num£Ûkey&3£Ý;
if (c&1) key=0x80+(key>>1);
else key>>=1;
di++;
}whiÿÿÿÿ
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