第一章
检测点1.1
1) 13
(8kb = 8 * 1024 = 2^13)
2) 1024 0 1023
3) 8*1024 1024
(1 byte = 8 bit,计算机以byte为存储单位)
4) 1024^3 1024^2 1024
5) 2^6 1 2^4 2^2
(kb = 2^10 Mb = 2^20 Gb = 2^30)
6) 1 1 2 2 4
7) 512 256
(8086的寄存器为16位寄存器,一次可以读取两个字节,80386为32位寄存器)
8) 二进制
第二章
检测点2.1
1)
AX = F4A3h
AX = 31A3h
AX = 3123h
AX = 6246h
BX = 826Ch
CX = 6246h
AX = 826Ch
AX = 04D8h
AX = 0482h
AX = 6C82h
AX = D882h
AX = D888h
AX = D810h
AX = 6246h
2)
mov ax,2
add ax,ax
add ax,ax
add ax,ax
检测点2.2
1)00010h 1000fh
(0001h+0000h 0001h+ffffh)
2)1001h 2000h
(偏移地址的范围为0000-ffff,内存单元=段地址*16+偏移地址,当偏移地址最小时,段地址最大,偏移地址最大时,段地址最小)
检测点2.3
4次修改IP,最后IP为0
第三章
检测点3.1
1)
mov ax,1
mov ds,ax
mov ax,[1000] AX = 2662h
mov bx,[1001] BX = E626h
mov ax,bx AX = E626h
mov ax,[0000] AX = 2662h
mov bx,[0002] BX = D6E6h
add ax,bx AX = FD48h
add ax,[0004] AX = 2C14h
mov ax,0 AX = 0000h
mov al,[0002] AX = 00E6h
mov bx,0 BX = 0000h
mov bl,[000C] BX = 0026h
add al,bl AX = 000Ch
2)
CS = 2000h,IP = 0,DS = 1000h
mov ax,6622h AX = 6622h
jmp 0ff0:0100h CS = 0ff0 IP = 0100h
mov ax,2000h AX = 2000h
mov ds,ax DS = 2000h
mov ax,[0008] AX = C389h
mov ax,[0002] AX = EA66h
mov ax,6622h AX = 6622h
数据和程序表达上没有区别,只跟存储的地方有关,存在数据段中即为数据,存在程序段中就是程序
检测点3.2
1)
mov ax,2000h
mov ss,ax
mov sp,10h
2)
mov ax,1000h
mov ss,ax
mov sp,0
第六章
检测点6.1
1)
mov cs:[bx],ax
2)
cs
26或1ah
pop cs:[bx]
第九章
检测点9.1
1)
db 8 dup (0)
2)
offset start
cs
3)
CS = 0006h IP = 00BE
检测点9.2
mov cl,[bx]
mov ch,0
jcxz ok
inc bx
检测点9.3
inc cx
(因为loop s执行时是先将cx减一再与0比较)
第十章
检测点10.1
1000
0000
检测点10.2
ax = 3
检测点10.3
ax = 1006
检测点10.4
ax = 9
(call ax时将IPpush到栈中,也就是push 3)
检测点10.5
1)
ax = 3
2)
ax = 0001 bx = 0000
第十一章
检测点11.1
1 1 0
1 1 0
1 1 0
1 1 0
0 0 0
0 1 0
0 1 0
检测点11.2
0 0 0 1 1
0 0 0 1 1
0 0 1 0 0
0 0 1 0 0
1 1 0 1 1
1 1 0 1 1
1 0 0 0 0
1 0 0 0 0
0 1 1 0 1
检测点11.3
1)
jna s0
jna s0
2)
jb s0
jb s0
检测点11.4
ax = 0871h
检测点12.1
1)
039D:0016
2)
0000:[4N]
0000:[4N+2]
检测点13.1
assume cs:code,ds:data
data segment
db 'conversation',0
data ends
code segment
start: mov ax,cs
mov ds,ax
mov si,offset show
mov ax,0
mov es,ax
mov di,200h
mov cx,offset showend-offset show
cld
rep movsb
mov ax,0
mov es,ax
mov word ptr es:[7ch*4],200h
mov word ptr es:[7ch*4+2],0
mov ax,data
mov ds,ax
mov si,0
mov ax,0b800h
mov es,ax
mov di,12*160
s: cmp byte ptr [si],0
je ok
mov al,[si]
mov es:[di],al
mov al,2
mov es:[di+1],al
inc si
add di,2
mov bx,offset s-offset ok
int 7ch
ok: mov ax,4c00h
int 21h
show: push bp
mov bp,sp
add [bp+2],bx
pop bp
iret
showend:nop
code ends
end start
检测点13.2
1)
错误,不能向BIOS中写程序
2)
错误,19h中断在操作系统以前,而DOS由操作系统控制即在操作系统以后
检测点14.1
1)
mov al,2
out 70h,al
in al,71h
2)
mov al,0
out 71h,al
mov al,2
in 70h,al
检测点14.2
在不考虑溢出的情况下:
mov ax,__
mov bx,ax
shl bx,1
mov cl,3
shl ax,cl
add ax,bx
第十五章
检测点15.1
1)
pushf
call dword ptr ds:[0]
2)
在中断向量表中设置新的int9中断入口地址的时候不让其发生中断,即
cli
mov word ptr es:[9*4],offset int9
mov word ptr es:[9*4+2],cs
sti
恢复中断向量表int9的源地址时同理:
cli
push ds:[0]
pop es:[9*4]
push ds:[2]
pop es:[9*4+2]
sti
第十六章
检测点16.1
a[si]
b
b
1
检测点16.2
mov ax,data
mov es,ax
第十七章
检测点17.1
IF = 1 DI(disable interupt)
IF = 0 EI(enable interupt)
当执行int16中断时是从缓冲区中读出字符,若缓冲区为空,则int16应该可以响应int9的中断,故IF不一定为1