汇编语言学习
学习资料
图书：http://c.biancheng.net/view/3378.html
视频：https://www.bilibili.com/video/BV1mt411R7Xv?from=search&seid=7216001317872532936
思维导图：https://pan.baidu.com/s/1HAGT3w0dszhZhJf_a_ccHg 提取码：9pmu XMind打开方式?
习题答案： https://blog.csdn.net/heiyeleng/article/details/50651602
延伸阅读：与程序员相关的CPU缓存知识
汇编程序
-
改变屏幕颜色
7 6 5 4 3 2 1 0
BL R G B I R G B
闪烁 背景 高亮 前景
assume cs:code,ds:data,ss:stack
data segment
db 128 dup (0)
data ends
stack segment stack
db 128 dup (0)
stack ends
code segment
start:
mov ax,stack
mov ss,ax
mov sp,128
call init_reg
call set_screen
mov ax,4C00H
int 21H
;=======================
set_screen:
mov bx,1
mov cx,2000
mov dl,00000101B
do:
mov es:[bx],dl
add bx,2
loop do
ret
;========================
init_reg:
mov bx,0B800H
mov es,bx
mov bx,data
mov ds,bx
ret
code ends
end start
2.屏幕特定位置打印语句
assume cs:code,ds:data,ss:stack
data segment
db 'welcome to masm!'
db 'welcome to masm!'
db 'welcome to masm!'
db 'welcome to masm!'
data ends
stack segment stack
db 128 dup (0)
stack ends
code segment
start:
mov ax,stack
mov ss,ax
mov sp,128
mov ax,data
mov ds,ax
mov bx,0
mov si,0
mov cx,4
outer:
push cx
push si
mov cx,16
inner:
and byte ptr ds:[bx+si],11011111B
inc si
loop inner
add bx,16
pop si
pop cx
loop outer
mov ax,4C00H
int 21H
code ends
end start
3.寻址方式在结构化数据访问中的应用
assume cs:code,ds:data,ss:stack
;将数据制表
data segment
;years
db '1975','1976','1977','1978','1979','1980','1981'
db '1982','1983','1984','1985','1986','1987','1988'
db '1989','1990','1991','1992','1993','1994','1995'
;income
dd 16,22,382,1356,2390,8000,16000,24486,50065,97479,140417,197514
dd 345980,590827,803530,1183000,1843000,2759000,3753000,4649000,5937000
;staff
dw 3,7,9,13,28,38,130,220,476,778,1001,1442,2258,2793,4037
dw 5635,8226,11542,14430,15257,17800
data ends
table segment
;0123456789ABCDEF
db 21 dup ('year summ ne ?? ')
table ends
stack segment stack
db 128 dup (0)
stack ends
code segment
start:
mov ax,stack
mov ss,ax
mov sp,128
mov ax,data
mov ds,ax
mov ax,table
mov es,ax
mov bx,0
mov di,21*4+21*4
mov bp,0
mov cx,21
do:
;year
push ds:[bx]
pop es:[bp]
push ds:[bx+2]
pop es:[bp+2]
;summ
push ds:[bx+21*4]
pop es:[bp+5]
push ds:[bx+21*4+2]
pop es:[bp+7]
;ne
push ds:[di]
pop es:[bp+10]
;??
mov dx,es:[bp+7]
mov ax,es:[bp+5]
div word ptr es:[bp+10]
mov es:[bp+13],ax
add bx,4
add di,2
add bp,16
loop do
mov ax,4C00H
int 21H
code ends
end start
4.将内存字符显示到屏幕
assume cs:code,ds:data,ss:stack
data segment
db 'welcome to masm!'
db 10000010B,00101100B,01110001B
data ends
stack segment stack
db 128 dup (0)
stack ends
code segment
start:
mov ax,stack
mov ss,ax
mov sp,128
call init_reg
call clear_screen
call show_string
mov ax,4C00H
int 21H
;=======================
show_string:
mov bx,0
mov si,16
mov bp,160*11+72
mov cx,3
outer:
push cx
push bx
push bp
mov dh,ds:[si]
mov cx,16
inner:
mov dl,ds:[bx]
mov es:[bp],dx
inc bx
add bp,2
loop inner
pop bp
pop bx
pop cx
inc si
add bp,160
loop outer
ret
;=======================
clear_screen:
mov bx,0
mov dx,0
mov cx,2000
do:
mov es:[bx],dx
add bx,2
loop do
ret
;=======================
init_reg:
mov ax,data
mov ds,ax
mov ax,0B800H
mov es,ax
ret
;========================
code ends
end start
5.转移指令的应用
assume cs:code,ds:data,ss:stack
data segment
db '1) restart pc',0
db '2) start system',0
db '3) show clock',0
db '4) set clock',0
data ends
stack segment stack
db 128 dup (0)
stack ends
code segment
start:
mov ax,stack
mov ss,ax
mov sp,128
call init_reg
call clear_screen
mov bx,0
mov si,16
mov bp,160*11+72
call show_string
mov ax,4C00H
int 21H
;=======================
show_string:
mov cx,4
mov dh,00000100B
outer:
push cx
push bp
mov ch,0
inner:
mov cl,ds:[bx]
jcxz ok
mov es:[bp],cl
inc bp
mov es:[bp],dh
inc bx
inc bp
jmp inner
ok:
pop bp
pop cx
inc bx
add bp,160
loop outer
ret
;=======================
clear_screen:
mov bx,0
mov dx,0
mov cx,2000
do:
mov es:[bx],dx
add bx,2
loop do
ret
;=======================
init_reg:
mov ax,data
mov ds,ax
mov ax,0B800H
mov es,ax
ret
;========================
code ends
end start
6.课程设计一，数据处理
assume cs:code,ds:data,ss:stack
;将数据制表
data segment
;years
db '1975','1976','1977','1978','1979','1980','1981'
db '1982','1983','1984','1985','1986','1987','1988'
db '1989','1990','1991','1992','1993','1994','1995'
;income
dd 16,22,382,1356,2390,8000,16000,24486,50065,97479,140417,197514
dd 345980,590827,80353,118300,184300,275900,375300,464900,593700
;staff
dw 3,7,9,13,28,38,130,220,476,778,1001,1442,2258,2793,4037
dw 5635,8226,11542,14430,15257,17800
data ends
table segment
;0123456789ABCDEF
db 21 dup ('year summ ne ?? ')
table ends
stack segment stack
db 128 dup (0)
stack ends
code segment
start:
;stack
mov ax,stack
mov ss,ax
mov sp,128
;src
mov ax,data
mov ds,ax
mov bx,0
;desc
mov ax,table
mov es,ax
mov bp,0
call to_table
call clear_screen
;src
mov ax,table
mov ds,ax
mov bx,0
;desc
mov ax,0B800H
mov es,ax
mov bp,160*2+10
call to_screen
mov ax,4C00H
int 21H
;========================
to_screen:
mov byte ptr ds:[21*4*3],4
mov cx,21
do_to_screen:
call show_year
call show_summ
call show_ne
call show_avg
add bx,16
add bp,160
loop do_to_screen
ret
;========================
to_number_show_screen:
push cx
mov si,10
div_si:
div si
mov cx,ax
add dl,30H
mov dh,ds:[21*4*3]
mov es:[bp],dx
jcxz break_div
mov dx,0
sub bp,2
jmp div_si
break_div:
pop cx
ret
;========================
show_avg:
mov dx,0
mov ax,ds:[bx+13]
push bp
add bp,60
call to_number_show_screen
pop bp
ret
;========================
show_ne:
mov dx,0
mov ax,ds:[bx+10]
push bp
add bp,50
call to_number_show_screen
pop bp
ret
;========================
show_summ:
mov dx,ds:[bx+7]
mov ax,ds:[bx+5]
push bp
add bp,30
call to_number_show_screen
pop bp
ret
;========================
show_year:
push cx
push bp
push bx
mov cx,4
mov dh,ds:[21*4*3]
do_year:
mov dl,ds:[bx]
mov es:[bp],dx
inc bx
add bp,2
loop do_year
pop bx
pop bp
pop cx
ret
;========================
clear_screen:
mov bx,0B800H
mov es,bx
mov bx,0
mov dx,0
mov cx,2000
do_screen:
mov es:[bx],dx
add bx,2
loop do_screen
ret
;========================
to_table:
mov di,21*4+21*4
mov cx,21
do_table:
;year
push ds:[bx]
pop es:[bp]
push ds:[bx+2]
pop es:[bp+2]
;summ
push ds:[bx+21*4]
pop es:[bp+5]
push ds:[bx+21*4+2]
pop es:[bp+7]
;ne
push ds:[di]
pop es:[bp+10]
;??
mov dx,es:[bp+7]
mov ax,es:[bp+5]
div word ptr es:[bp+10]
mov es:[bp+13],ax
add bx,4
add di,2
add bp,16
loop do_table
ret
code ends
end start
7.代码复制
assume cs:code,ds:data,ss:stack
data segment
db 128 dup (0)
data ends
stack segment stack
db 128 dup (0)
stack ends
code segment
start:
mov ax,stack
mov ss,ax
mov sp,128
call copy_code
mov ax,4C00H
int 21H
;===================
boot:
mov ax,4C00H
int 21H
boot_end: nop
;===================
copy_code:
mov bx,cs
mov ds,bx
mov si,OFFSET boot ;ds:[si]
mov bx,0
mov es,bx
mov di,7E00H ;es:[di]
mov cx,OFFSET boot_end - OFFSET boot
cld
rep movsb
ret
code ends
end start
8.课程设计2
assume cs:code,ds:data,ss:stack
stack segment
db 128 dup (0)
stack ends
data segment
begin db 512 dup (0)
begin_boot db 512 dup (0)
db 512 dup (0)
db 512 dup (0)
data ends
code segment
start:
mov ax,stack
mov ss,ax
mov sp,128
call copy_introduce
call copy_boot_disk
mov ax,4c00h
int 21h
;===============================
introduce: ;引导程序，将程序复制到0:7c00处，
mov bx,0
mov ss,bx
mov sp,7c00h
call save_old_int9
call copy_Boot_fromdisk
mov bx,0
push bx
mov bx,7e00h ;设置cs：ip为0:7e00h执行Boot程序
push bx
retf
;===============================
copy_Boot_fromdisk:
mov bx,0
mov es,bx
mov bx,7e00h
mov al,2
mov ch,0
mov cl,2
mov dl,0
mov dh,0
mov ah,2
int 13h
ret
;===============================
save_old_int9:
mov bx,0
mov es,bx
push es:[9*4]
pop es:[200h]
push es:[9*4+2]
pop es:[202h]
ret
;===============================
db 512 dup (0)
introduce_end:nop
;=================================
copy_introduce:
mov bx,cs
mov es,bx
mov bx,offset introduce
mov al,1
mov ch,0
mov cl,1
mov dl,0
mov dh,0
mov ah,3
int 13h
ret
;===============================
copy_boot_disk:
mov bx,cs
mov es,bx
mov bx,offset Boot
mov al,2
mov ch,0
mov cl,2
mov dl,0
mov dh,0
mov ah,3
int 13h
ret
;===============================
Boot:
jmp Boot_start
;===============================
option1 db '(1) reset pc',0
option2 db '(2) start system',0
option3 db '(3) clock',0
option4 db '(4) set clock',0
address_option dw offset option1 - offset Boot + 7e00h
dw offset option2 - offset Boot + 7e00h
dw offset option3 - offset Boot + 7e00h
dw offset option4 - offset Boot + 7e00h
timestyle db '00/00/00 00:00:00',0
timeadress db 9,8,7,4,2,0
string_stack db 12 dup ('0'),0
;===============================
Boot_start:
call init_reg
call clear_screen
call show_option
jmp short choose_option
mov ax,4c00h
int 21h
;===============================
choose_option:
call clear_buff
mov ah,0
int 16h
cmp al,'1'
je choose1
cmp al,'2'
je choose2
cmp al,'3'
je choose3
cmp al,'4'
je choose4
jmp choose_option
choose1:mov di,160*3
mov byte ptr es:[di],'1'
mov bx,0ffffh
push bx
mov bx,0
push bx
retf
jmp choose_option
choose2:mov di,160*3
mov byte ptr es:[di],'2'
call start_old_system
jmp choose_option
choose3:mov di,160*3
mov byte ptr es:[di],'3'
call show_clock
jmp Boot_start
choose4:mov di,160*3
mov byte ptr es:[di],'4'
call set_clock
jmp choose_option
;===============================
start_old_system:
mov bx,0
mov es,bx
mov bx,7c00h
mov al,1
mov ch,0
mov cl,1
mov dl,80h ;80h代表C盘
mov dh,0
mov ah,2
int 13h
mov bx,0
push bx
mov bx,7c00h
push bx
retf
;===============================
set_clock:
call clear_string_stack
call show_string_stack
call get_string
call set_time
ret
;===============================
set_time:
mov bx,offset timeadress - offset Boot + 7e00h
mov si,offset string_stack - offset Boot +7e00h
mov cx,6
settime:
mov dx,ds:[si]
sub dh,30h
sub dl,30h
shl dl,1
shl dl,1
shl dl,1
shl dl,1
and dh,00001111b
or dl,dh
mov al,ds:[bx]
out 70h,al
mov al,dl
out 71h,al
add si,2
inc bx
loop settime
ret
;===============================
get_string:
mov si,offset string_stack - offset Boot + 7e00h
mov bx,0
getstring:
call clear_buff
mov ah,0
int 16h
cmp al,'0'
jb notnumber
cmp al,'9'
ja notnumber
call char_push
call show_string_stack
jmp getstring
getstringret:
ret
notnumber:
cmp ah,0eh
je isbackspace
cmp ah,1ch
je getstringret
jmp getstring
isbackspace:
call char_pop
call show_string_stack
jmp getstring
;===============================
char_pop:
cmp bx,0
je charpopret
dec bx
mov byte ptr ds:[si+bx],'0'
charpopret:
ret
;===============================
char_push:
cmp bx,11
ja charpushret
mov ds:[si+bx],al
inc bx
charpushret:
ret
;===============================
show_string_stack:
push si
push di
mov si,offset string_stack - offset Boot + 7e00h
mov di,160*4
call showstr
pop di
pop si
ret
;===============================
clear_string_stack:
push bx
push cx
push es
push si
push di
mov si,offset string_stack - offset Boot + 7e00h
mov dx,3030h
mov cx,6
clearstringstack:
mov ds:[si],dx
add si,2
loop clearstringstack
pop di
pop si
pop es
pop cx
pop bx
ret
;===============================
show_clock:
call show_style
call set_new_int9
mov bx,offset timeadress - offset Boot + 7e00h
showtime:
mov si,bx
mov di,160*20
mov cx,6
showdate:
mov al,ds:[si]
out 70h,al
in al,71h
mov ah,al
shr ah,1
shr ah,1
shr ah,1
shr ah,1
and al,00001111b
add ah,30h
add al,30h
mov es:[di],ah
mov es:[di+2],al
add di,6
inc si
loop showdate
jmp showtime
show_clockret:
call set_old_int9
ret
;===============================
show_style:
mov si,offset timestyle - offset Boot + 7e00h
mov di,160*20
call showstr
ret
;===============================
set_old_int9:
push bx
push es
mov bx,0
mov es,bx
cli
push es:[200h]
pop es:[9*4]
push es:[202h]
pop es:[9*4+2]
sti
pop es
pop bx
ret
;===============================
set_new_int9:
push bx
push es
mov bx,0
mov es,bx
cli
mov word ptr es:[9*4],offset newint9 - offset Boot + 7e00h
mov word ptr es:[9*4+2],0
sti
pop es
pop bx
ret
;===============================
newint9:
push ax
call clear_buff
in al,60h
pushf
call dword ptr cs:[200h]
cmp al,01h
je inesc
cmp al,3bh
jne int9ret
call change_time_color
int9ret:
pop ax
iret
inesc:
pop ax
add sp,4
popf
jmp show_clockret
;===============================
change_time_color:
push bx
push cx
push es
mov bx,0b800h
mov es,bx
mov cx,17
mov bx,160*20+1
change_time_colors:
inc byte ptr es:[bx]
add bx,2
loop change_time_colors
pop es
pop cx
pop bx
;===============================
clear_buff:
mov ah,1
int 16h
jz clearbuffret
mov ah,0
int 16h
jmp clear_buff
clearbuffret:
ret
;===============================
show_option:
mov bx,offset address_option - offset Boot + 7e00h
mov cx,4
mov di,160*10 + 30*2
show_options:
mov si,ds:[bx]
call showstr
add di,160
add bx,2
loop show_options
ret
;===============================
showstr:
push cx
push di
showstrs:
mov cl,ds:[si]
cmp cl,0
je showstrret
mov es:[di],cl
add di,2
inc si
jmp short showstrs
showstrret:
pop di
pop cx
ret
;===============================
init_reg:
mov bx,0b800h
mov es,bx
mov bx,0
mov ds,bx
ret
;===============================
clear_screen:
mov bx,0
mov dx,0700h ;清屏中对字符属性设置应该为07h，而不是0
mov cx,2000
clearscreen:
mov es:[bx],dx
add bx,2
loop clearscreen
ret
;===============================
db 512 dup (0)
Boot_end:
nop
code ends
end start
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