?? main.c
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volatile unsigned int *P_IOA_Data=(unsigned int*)(0x7000); volatile unsigned int *P_IOA_Dir=(unsigned int*)(0x7002);volatile unsigned int *P_P_IOA_Attrib=(unsigned int*)(0x7003);unsigned int old,new,push,rel,temp,row;void key(void){ for(row=0x10;row<0x100;row=row<<1) { *P_IOA_Data=*P_IOA_Data&row; new=(new<<4)| *P_IOA_Data&0x0f; } if((temp=new^old)>0) { push=temp&new; rel=temp&old; old=new; }}///////////////////////////////////////main(){ *P_IOA_Dir=0x00f0; *P_P_IOA_Attrib=0; *P_IOA_Data=0x000f; key();}
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