第三章 汇编电路详解.ppt

第 三 章 习 题 课 (3) LEA BX,[BX+20H][SI] MOV AX, [ BX + 2 ]; (BX)=（BX+SI+20H）=0024H+0012H+20H=0056H PA=DS*16+[BX+2H]=091D0H+0056H+2H= 09228H (AX)= ([09228H])=1E40H P128 3.1题 已知 DS = 091DH, SS = 1E4AH, AX = 1234H, BX = 0024H, CX = 5678H, BP = 0024H, SI = 0012H, DI = 0032H, (09226H) = 00F6H, (09228H) =1E40H, (1E4F6H) = 091DH. 在以上给出的环境下，试问下列指令或指令段执行后的结果如何? 第 三 章 习 题 课 (4) LDS SI, [BX][DI] MOV [ SI], BX; PA1=DS*16+BX+DI=091D0H+0024H+0032H=09226H 将PA所在单元的双字送入DS、SI SI=（[09226]）=00F6H DS=（[09228H]）=1E40H PA2=DS*16+SI=1E400H+F6H=1E4F6H (1E4F6H)=0024H P128 3.1题 已知 DS = 091DH, SS = 1E4AH, AX = 1234H, BX = 0024H, CX = 5678H, BP = 0024H, SI = 0012H, DI = 0032H, (09226H) = 00F6H, (09228H) =1E40H, (1E4F6H) = 091DH. 在以上给出的环境下，试问下列指令或指令段执行后的结果如何? debug x31入口137H 第 三 章 习 题 课 (5) XCHG CX, [BX + 32H] XCHG [ BX + 2OH] [SI] ,AX PA1= DS*16+BX+32H =091D0H+0024H+0032H=09226H 与CX进行交换 （CX）=00F6H （[09226H]）=（CX）=5678H P128 3.1题 已知 DS = 091DH, SS = 1E4AH, AX = 1234H, BX = 0024H, CX = 5678H, BP = 0024H, SI = 0012H, DI = 0032H, (09226H) = 00F6H, (09228H) =1E40H, (1E4F6H) = 091DH. 在以上给出的环境下，试问下列指令或指令段执行后的结果如何? PA2= DS*16+BX+SI+20H = 091D0H+0024H+0012H+0020H =09226H 与AX进行交换 （AX）=5678H （[09226H]）=1234H (1) MOV AX, 1352H AX = 1352H 第 三 章 习 题 课 (2) MOV AX, [1352H] AX =26FFH (3) MOV 0150H[BX] ,CH PA1= DS*16+BX+150H=10000H+1200H+150H=11350H (11350H) = 33H (11351H)= 3CH P128 3.2题 设, DS=1000H; SS = 2000H, AX = 1A2BH, BX = 1200H, CX = 339AH, BP =1200H,SP = 1352H, SI= 1354H, (11350H) =0A5H, (11351H) = 3CH, (11352H) =OFFH,(11353H) = 26H, (11354H) = 52H, (11355H) = 0E7H, (126A4H) = 9DH,(126A5H) = 16H, (21350H) = 88H, (21351H) = 51H. 下列各指令都在此环境下执行，在下列各小题的空格中填人相应各指令执行结果。 (4) Mov AX,0150H[BP] PA= SS*16+BP+150H=20000H+1200H+150H=21350H (21350H) 送AX=5188H AX =5188H 第 三 章 习 题 课 P128 3.2题 设, DS=1000H; SS = 2000H, AX = 1A2BH, BX = 1200H, CX = 339AH, BP =1200H,SP = 1352H, SI= 1354H, (11350H)