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2011答案

2011答案
2011答案

一、填空题

1、执行部件EU的组织有:4个通用寄存器,4个专用寄存器和1个标志寄存器和算术逻辑部件。

2、8086CPU从偶地址访问内存1个字时需占用1个总线周期,而从奇地址访问内存1个字操作需占用 2个总线周期。

3、IBM-PC机中的内存是按段存放信息的,一个段最大存贮空间为64K字节。

4、8086微处理机在最小模式下,用M/IO来控制输出地址是访问内存还是访问I/O。

5、一台计算机能执行多少种指令,是在设计时确定的。

二、单项选择题

1、微型计算机的性能主要由 B 来决定。

A、价钱

B、CPU

C、控制器

D、其它

2、对微处理器而言,它的每条指令都有一定的时序,其时序关系是 C

A、一个时钟周期包括几个机器周期,一个机器周期包括几个指令周期。

B、一个机器周期包括几个指令周期,一个指令周期包括几个时钟周期。

C、一个指令周期包括几个机器周期,一个机器周期包括几个时钟周期。

D、一个指令周期包括几个时钟周期,一个时钟周期包括几个机器周期。

3、属于数据寄存器组的寄存器是 C

A、AX,BX,CX,DS

B、SP,DX,BP,IP

C、AX,BX,CX,DX

D、AL,DI,SI,AH

4、微型计算机的ALU部件是包含在 D 之中。

A、存贮器

B、I/O接口

C、I/O设备

D、CPU

5、在8086和8088汇编语言中,一个字能表示的有符号数的范围是 B

A、-32768≤n≤32768

B、-32768≤n≤32767

C、-65535≤n≤65535

D、-65536≤N≤65535

6、80386微型计算机是32位机,根据是它的 D 。

A、地址线是32位

B、数据线为32位

C、寄存器是32位的

D、地址线和数据线都是32位

7、某数存于内存数据段中,已知该数据段的段地址为2000H,而数据所在单元的偏移地址为0120H,该数的在内存的物理地址为( B )

A.02120H B.20120H C.21200H D.03200H

8、在存贮器读周期时,根据程序计数器PC提供的有效地址,使用从内存中取出( D )

A.操作数 B.操作数地址 C.转移地址 D.操作码

9、8086/8088系统中,对存贮器进行写操作时,CPU输出控制信号有效的是( A )

A.W/IO=1, WR=0

B. WR=1

C.M/IO=0, RD=0

D.RD=0

10、在8086/8088微机系统中,将AL内容送到I/O接口中,使用的指令是( D )

A.IN AL,端口地址

B.MOV AL,端口地址

C.OUT AL,端口地址

D.OUT 端口地址,AL

2010-2011学年度第二学期参考答案及评分标准

一、单项选择

1. D 2. C 3. B 4. D 5. B

6. A 7. C 8. A 9. A 10. B

11. A 12. D 13. B 14. C 15. D

二、填空题(把答案填写在题中横线上,每空1分,共20分)

1._分时复用____ 2._CPU____;_存储器____;_I/O设备____

3._4__;___16____;____16____;____6_____;____20____

4._段地址___;__偏移地址___ 5._ 1___ 6._45H___

7._越慢___;_越大___;_越低___ 8._存取时间___;_存取周期___ 9._最后___ 10._2FAH,2FCH,2FEH___

三、综合题(第1、3题10分,第2、4题15分,共50分)

1. A19 A18 A17 A16 A15 A14 A13 A12 – A0

0 0

第一组范围: 0 0 1 1 1 1 0

1 …… 1 2分

即为:3C000H—3EFFFH 3分

A19 A18 A17 A16 A15 A14 A13 A12 – A0

0 0

第二组范围: 0 0 1 1 0 0 1

1 …… 1 即为:32000H—33FFFH 3分

2.(1)N0=1MHZ/2KHZ=500,GATE0接高电平,+5V; 2分

(2)可将OUT0与CLK1相连,作为输入时钟脉冲; 3分

(3)N1=2KHZ/2HZ=1000 2分

计数器0(横着看程序):MOV DX,186H MOV AL,00110111B OUT DX,AL MOV DX,180H MOV AL,00H OUT DX,AL

MOV AL,05H OUT DX,AL 1分计数器1:MOV DX,186H MOV AL,01110111B OUT DX,AL

MOV DX,182H MOV AL,00H OUT DX,AL

MOV AL,10H OUT DX,AL 1分3.MOV AL,10001111B (横着看程序)

OUT 93H,AL IN AL,91H OUT 90H,AL

译码电路连接如下: 6分

4.假设已知(DS)=2900H,(ES)=2100H,(SS)=1500H,(SI)=00A0H,(BX)= 0100H,(BP)=0010H,数据段中变量名VAL的偏移地址值为0050H,试指出下列源操作数字段的寻址方式是什么?其物理地址值是多少?

(1) MOV AX,0ABH (2) MOV AX,BX (3) MOV AX,[100H] (4) MOV AX,VAL (5) MOV AX,[BX] (6) MOV AX,ES:[BX] (7) MOV AX,[BP] (8) MOV AX,[S I](9) MOV AX,[BX+10] (10) MOV AX,VAL[BX](11) MOV AX,[BX][SI](12) MOV AX,[BP][SI]

答:(1)在指令 MOV AX,0ABH 中,源操作数字段的寻址方式是立即数寻址,其物理地址值=(CS)*10H+(IP);(2)在指令 MOV AX,BX 中,源操作数字段的寻址方式是寄存器寻址,操作数在BX中,无物理地址;(3)在指令 MOV AX,[100H] 中,源操作数字段的寻址方式是直接寻址,其物理地址值=(DS)*10H+100 =29000H+100H=29100;(4)在指令 M OV AX,VAL 中,源操作数字段的寻址方式是直接寻址,其物理地址值=(DS)*10H+50H =2 9000H+50H=29050H;(5)在指令 MOV AX,[BX] 中,源操作数字段的寻址方式是寄存器间接寻址,其物理地址值=(DS)*10H +(BX)=29000H+100H=29100H;(6)在指令 MOV AX,ES:[BX] 中,源操作数字段的寻址方式是寄存器间接寻址,其物理地址值=(ES)*10H+(B X)=21000H+100H=21100H;(7)在指令 MOV AX,[BP] 中,源操作数字段的寻址方式是寄存器间接寻址,其物理地址值=(SS)*10H +(BP)=15000H+10H=15010H;(8)在指令 MO V AX,[SI] 中,源操作数字段的寻址方式是寄存器间接寻址,其物理地址值=(DS)*10H +(SI)=29000H+0A0H=290A0H;(9)在指令 MOV AX,[BX+10] 中,源操作数字段的寻址方式是寄存器相对寻址,其物理地址值=(DS)*10H+(BX)+0AH= 29000H+100H+0AH =2910AH;(10)在指令 MOV AX,VAL[BX] 中,源操作数字段的寻址方式是寄存器相对寻址,其物理地址值=(DS)*10H+(BX)+50H= 29000H+100H+50H= 29150H;(11)在指令 MOV AX,[BX] [SI] 中,源操作数字段的寻址方式是基址变址寻址,其物理地址值=(DS)*10H+(BX)+(SI) =29000H+100H+0A0H =291A0H;(12)在指令 MOV AX,[BP][SI] 中,源操作数字段的寻址方式是基址变址寻址,其物理地址值=(SS)*10H+(BP)+(SI)=15000H+10H+0A0H =150B0H

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五、(10%)解:,)(T T T T B C BC AXB == 又,0≠B T B B ,都可逆, T T C A X C AX 1-=?= (4%) =-1A ??????????--100210121, =X ???? ??????----111211110 (6%) 六、(10%)解:[]???? ? ??--→→=000011001112a a a b A A Λ (2%) (1) 当,1≠a 且1-≠a ,方程组有无穷多组解,一般解为 ,1121x a x -+= ( 1123x a x +=为自由未知量) (4%) (2) 当,1=a 方程组有无穷组解,一般解为: , ( 132321x x x x x --=是自由未知量) (4%) 七、(14%)解:(1) 3)-(1)( 2λλλ+=-A E ,,12,1-=λ33=λ (2%) 对,12,1-=λ得特征向量()T 0,1,11-=ξ, ()T 1,0,02=ξ 所有特征向量为 212211,( k k k k ξξ+为不全为零的任意常数)(2%) 对33=λ,得特征向量()T 0,1,13=ξ, 所有特征向量为 333( k k ξ是任意非零常数) (2%) (2) λ是A 的特征值,X 是对应的特征向量,则122++λλ是E A A ++22的特 征值,且X 仍是对应的特征向量。 E A A ++22的特征值为,02,1=λ 163=λ (3%) 对应于02,1=λ的特征向量为 ,21ξξ 对应于163=λ的特征向量为 3ξ,且向量组成 ,21ξξ, 3ξ正交, 将其单位化:T ??? ??-==0,21,211111ξξη,

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第六章 线性空间与线性变换 1. 验证所给矩阵集合对于矩阵的加法和乘数运算构成线性空间, 并写出各个空间的一个基. (1) 2阶矩阵的全体S 1; 解 设A , B 分别为二阶矩阵, 则A , B ∈S 1. 因为 (A +B )∈S 1, kA ∈S 1, 所以S 1对于矩阵的加法和乘数运算构成线性空间. ??? ??=00 011ε, ??? ??=00102ε, ??? ??=0100 3ε, ?? ? ??=1000 4ε 是S 1的一个基. (2)主对角线上的元素之和等于0的2阶矩阵的全体S 2; 解 设??? ??-=a c b a A , ?? ? ??-=d f e d B , A , B ∈S 2 . 因为 2)(S d a a c b c d a B A ∈??? ??++++-=+, 2S ka kc kb ka kA ∈?? ? ??-=, 所以S 2对于矩阵的加法和乘数运算构成线性空间. ?? ? ? ?-=10011ε, ??? ??=00102ε, ?? ? ??=0100 3ε 是S 2的一个基. (3) 2阶对称矩阵的全体S 3. 解 设A , B ∈S 3, 则A T =A , B T =B . 因为 (A +B )T =A T +B T =A +B , (A +B )∈S 3,

(kA )T =kA T =kA , kA ∈S 3, 所以S 3对于加法和乘数运算构成线性空间. ??? ??=00 011ε, ??? ??=01102ε, ?? ? ??=1000 3ε 是S 3的一个基. 2. 验证: 与向量(0, 0, 1)T 不平行的全体3维数组向量, 对于数组向量的加法和乘数运算不构成线性空间. 解 设V ={与向量(0, 0, 1)T 不平行的全体三维向量}, 设r 1=(1, 1, 0)T , r 2=(-1, 0, 1)T , 则r 1, r 2∈V , 但r 1+r 2=(0, 0, 1)T ?V , 即V 不是线性空间. 3. 设U 是线性空间V 的一个子空间, 试证: 若U 与V 的维数相等, 则U =V . 证明 设ε1, ε2, ???, εn 为U 的一组基, 它可扩充为整个空间V 的一个基, 由于dim(U )=dim(V ), 从而ε1, ε2, ???, εn 也为V 的一个基, 则: 对于x ∈V 可以表示为x =k 1ε1+k 2ε2+ ??? +k r εr . 显然, x ∈U , 故V ?U , 而由已知知U ?V , 有U =V . 4. 设V r 是n 维线性空间V n 的一个子空间, a 1, a 2, ???, a r 是V r 的一个基. 试证: V n 中存在元素a r +1, ???, a n , 使a 1, a 2, ???, a r , a r +1, ???, a n 成为V n 的一个基. 证明 设r

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