汇编语言,求答案和步骤
现有AX=2000H,BX=1200H,DS=3000H,DI=0002H,(31200H)=50H,(31201H)=02H,(31202H)=40H,请写出下列各条指...
现有AX=2000H, BX=1200H, DS=3000H, DI=0002H, (31200H)=50H, (31201H)=02H, (31202H)=40H,请写出下列各条指令独立执行完后有关寄存器及存储单元的内容,并指出标志位ZF、CF的值。
ADD AX,1200H;问AX=________H,ZF=________
SUB AX,BX;问AX=________H,ZF=________
MOV AX,[BX];问AX=________H CF=_______
NEG WORD PTR[1200H];问(31200H)=________H CF=________ 展开
ADD AX,1200H;问AX=________H,ZF=________
SUB AX,BX;问AX=________H,ZF=________
MOV AX,[BX];问AX=________H CF=_______
NEG WORD PTR[1200H];问(31200H)=________H CF=________ 展开
2个回答
展开全部
ADD AX,1200H;问AX=__3200__H,ZF=___0_____
SUB AX,BX;问AX=____0E00____H,ZF=___0_____
MOV AX,[BX];问AX=___0050_____H CF=___0____
NEG WORD PTR[1200H];问(31200H)=___FFB0_____H CF=____1____
SUB AX,BX;问AX=____0E00____H,ZF=___0_____
MOV AX,[BX];问AX=___0050_____H CF=___0____
NEG WORD PTR[1200H];问(31200H)=___FFB0_____H CF=____1____
追问
SUB AX,BX;问AX=________H,怎么算的
追答
2000H-1200H=0E00H
借一当16,16-2=14 14就是E
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