习题评讲2013-2.ppt

第三章习题评讲,3-11,2）1234H,起始地址:12340H结束地址：12340+FFFF=2233FH,1）1000H,起始地址:10000H结束地址：10000+FFFF=1FFFFH,3）E000H,起始地址:E0000H结束地址：E0000+FFFF=EFFFFH,4）AB00H,起始地址:AB000H结束地址：AB000+FFFF=BAFFFH,3-12,1)CS=1000H,IP=2000H,PA=CS*16+IP=10000H+2000H=12000H,2)CS=2400H,IP=1A00H,PA=CS*16+IP=24000H+1A00H=25A00H,4)CS=3456H,IP=ABCDH,PA=CS*16+IP=34560H+ABCDH=3F12DH,3)CS=1A00H,IP=B000H,PA=CS*16+IP=1A000H+B000H=25000H,PA=CS*16+IP=1A000H+B000H=25000H,3-32,MOVAX,1200H立即数寻址2)MOVBX,1200H直接寻址3)MOVBX,SI变址寄存器间接寻址4)MOVBX,SI+1200H变址寻址5)MOVBX+SI,AL寄存器寻址,6)ADDAX,BX+DI+20H基址加变址7)MULBL寄存器8)JMPBX段内间接转移9)INAL,DX间接端口寻址10)INCWORDPTRBP+50H基址寻址,3-33,1）MOVAL,DIPA=DS*16+DIMOVAX,BX+SIPA=DS*16+BX+SIMOVAL,8BX+DIPA=DS*16+BX+DI+84)ADDAL,ES:BXPA=ES*16+BX,5)SUBAX,2400HPA=DS*16+2400H6)ADCAX,BX+DI+1200HPA=DS*16+BX+DI+1200HMOVCX,BP+SIPA=SS*16+BP+SIINCBYTEPTRDIPA=DS*16+DI,1）MOVSI,IP指令指针不能传送2）MOVCS,AX段寄存器不能作操作数MOVBL,SI+2传送类型不匹配MOV60H,AL目的操作数不能为立即数PUSH2400H立即数不能push操作,3-34,INCBX指明字节还是字7)MUL-60H乘数不能为立即数8)ADD2400H,2AH2400h前指明类型9)MOVBX,DI不能同为内存操作数10MOVSI,AL类型不匹配,MOVAX,0ABCHDECAXANDAX,00FFHMOVCL,4SALAL,1MOVCL,ALADDCL,78HPUSHAXPOPBX,AX0ABCHAX0ABBHAX00BBHCL4AL76HCL76HCLEEHAX0076HBX0076H,3-36,3-39,1）MOVLISTSI,DXPA=DS*10H+SI+LIST=1100H*10H+0250H+0500H=11750HMOVCL,LISTBX+SIPA=DS*10H+BX+SI+LIST=11000H+0200H+0500H+0250H=11950H,MOVCH,BX+SIPA=DS*16+BX+SI=11000H+0200H+0500H=11700H4)MOVDL,BX+100HPA=DS*16+BX+0100H=11000H+0200H+0100H=11300H,3-41,PUSHAXPUSHBXPOPAX,SP=SP-2-2+2=2000-2=1FFEHBX=5000HAX=5000H,解：,ANDAX,BXXORAX,AXNOTBX,3-43,AX5500HAX0000HBX00FFHCF0,3-45,1）MOVBX,AHPA=DS*10H+BX=3000H*10H+2000H=32000HADDAL,BX+SI+1000HPA=DS*10H+BX+SI+1000H=30000H+2000H+0100H+1000H=33100H,MOVAL,BX+SIPA=DS*16+BX+SI=30000H+2000H+0100H=32100H4)ADDAL,ES:BXPA=ES*16+BX=40000H+2000H=42000H,SUBAL,09H；ALAL-09HCMPAL,09H；不返回结果,CF=1,OF=0,ZF=0,SF=1,3-46,解：,1)ANDAH,0FH,XORAL,F0H,MOVCL,4SHRAL,CL,4)MOVCL,4SHLAL,CL,3-47,MOVCL,06HROLAX,CLSHRBX,CL,AX=1100H=0001000100000000循环左移6次0100000000000100=4004HBX=6D16H=0110110100010110逻辑右移6次0000000110110100=01B4H,3-48,解：,ANDAX,AXJZDONESHLCX,1RORAX,CLDONE:ORAX,1234,3-50,AX6264HCX0008HAX6462HAX7676H,已知：AC=1001H，DX=20FFH求：ADDAX,DX，标识寄存器,00010000000000010010000011111111,0011000100000000,CF=0,AF=1,SF=0,ZF=0,OF=0,3-57,+,解：,已知：DL=0F3H，BH=72H求：DL-BH，标识寄存器,1111001110001110,10000001,CF=0,AF=0,SF=1,ZF=0,OF=0,3-59,+,解：,3-62,MOVDL,5MOVAL,DLMULDLMULDL,MOVAL,CLMOVAH,0CBWDIVBLMOVBL,2MULBLMOVDX,AX,MOVAL,CLCBWIDIVBLMOVBL,2IMULBLMOVDX,AX,3-67,无符号数运算：,符号数运算：,MOVCL,3SHRDL,CL,SHLAL,1,MOVCL,3ROLAL,CL,4)RCRDX,1,3-75,3-76,1）位移量为0120HJMPNEARPTR符号地址,2）位移量为0012HJMPSHORT符号地址,3）位移量为12000HJMPFARPTR符号地址,段内近转移,段内短转移,段间转移,3-79,CLD；设置串操作方向MOVCX,100；串长度MOVSI,6180H；源串偏移，地址：DS:SIMOVDI,2000H；目的串偏移，地址：ES:DIREPMOVSB；移动传MOVAL,N；比较数MOVCX,100；串长度MOVDI,2000H；目的串REPNESCASB；比较直到相等/串结束JNEZER；不等，挑转DECDI；相等字符偏移MOVES:DI,20H；改变字符值ZER:.,DATAS1SEGMENTASTDBABCDEFG$COUNTEQU$-ASTDATAS1ENDSDATAS2SEGMENTBSTDB20DUP(?)DATAS2ENDSCODESSEGMENTASSUMECS:CODES,DS:DATAS1,ES:DATAS2START:MOVAX,DATAS1MOVDS,AXMOVAX,DATAS2MOVES,AXCLDMOVCX,COUNTLEASI,AST,LEADI,BSTREPMOVSBMOVAL,DMOVCX,COUNTLEADI,BSTREPNESCASBJNEZERDECDIMOVES:DI,20HZER:MOVAX,DATAS2MOVDS,AXMOVDX,OFFSETBSTMOVAH,9INT21HMOVAH,4CHINT21HCOD