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PUSH SI
PUSH DI
POP SI
POP DI PUSH SI
PUSH DI,
POP SI,DI MOV AX,SI
MOV SI,DI
MOV DI,AX MOVAX,SI
MOV BX,DI
XCHG BX,AX
to tell the children not to throw stones at the notice to warn the boys not to throw stones to attract the boys to throw stones at the notice to warn them whoever threw stones would be punished
Dx+Di=1 Dx+Di>1 Dx+Di<1 Dx-Di>1
PUSH SI PUSH SI PUSH DI PUSH DI POP SI POP DI POP DI POP SI MOV AX,SI MOV AX,SI MOV SI,AX MOV BX,DI MOV DI,BX XCHG BX,AX
LEA AX,20[DI] MOV AX,OFFSET DI MOV AX,20[DI] LEA AX[DI]
how they put these stones together how did they put these stones together that they put these stones together where did they put these stones together
stone; stone
stones; stones
stone; stones
stones; stone
都为1 都为0 DI22=1;DI26=0 DI22=0;DI26=1
PUSH SI PUSH DI POP SI POP DI PUSH SI PUSH DI POP DI POP SI MOV AX,SI MOV SI,AX MOV DI,BX MOVAX,SI MOV BX,DI XCHG BX,AX
LEAAX,20[DI] MOVAX,OFFSET DI MOV AX, 20[DI] LEA AX, [DI]
SI+SI+1,DI=DI+1 SI=SI+2,DI=DI+2 SI=SI-1,DI=DI-1 SI=SI-2,DI=DI–212.
PUSH SI PUSH DI POP SI POP DI PUSH SI PUSH DI, POP SI,DI MOV AX,SI MOV SI,DI MOV DI,AX MOVAX,SI MOV BX,DI XCHG BX,AX
(SI)=0FEH,(DI)=1FEH (SI)=100H,(DI)=202H (SI)=100H,(DI)=1FFH (SI)=100H,(DI)=1FEH
LEA AX,20[DI] MOV AX,OFFSET DI MOV AX,20[DI] LEA AX [DI]
DIt=0 DIt=100 DIt=80 DIt=50
Dx+Di=1 Dx+Di>1 Dx+Di<1 Dx-Di>1
Dx+Di=1 Dx+Di>1 Dx+Di<1 Dx-Di>1
di1=1 di2=1 di1=1,di2=0 di1=1,di2=1