西南交大微机实验代码Word格式文档下载.docx
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8255开关实验，8255CS接288H，K0-K7接PC0-PC7,L0-L7接PA0-PA7
io8255aequ288h
io8255cequ28ah
io8255zequ28bh
movdx,io8255z
moval,8bh
inout:
movdx,io8255c
inal,dx
movdx,io8255a
movdl,0ffh
movah,06h
jzinout
8255七段数码管静态显示,8255CS接288-28FH，PA0-PA6接数码管的段驱动输入端a-g，位驱动S0接GND
io8255aequ288h
io8255zequ28bh
datasegment
leddb3fh,06h,5bh,4fh,66h,6dh,7dh,07h,7fh,6fh
mesg1db0dh,0ah,'
Inputanum（0-9）,otherkeyisexit:
'
0dh,0ah,'
$'
dataends
assumecs:
code,ds:
data
movax,data
movds,ax
movax,80h
outax,al
sss:
movdx,offsetmesg1
movah,09h
movah,01
cmpal,'
0'
jlexit
jgexit
subal,30h
movbx,offsetled
xlat
jmpsss
8255行扫描键盘接口,8255CS接288H，PC0-PC3接键盘行ROW0-ROW3,PA0-PA5接键盘列SER0-SER5
keydb37h,38h,39h,41h,54h,52h
db34h,35h,36h,42h,53h,4dh
db31h,32h,33h,43h,48h,4ch
db30h,46h,45h,44h,58h,4eh
lp0:
movdx,io8255z;
端口指向控制寄存器
moval,90h;
1001000方式0，C输出，A输入
movdi,0;
movsi,0;
lp1:
moval,0
movdx,io8255c;
C输出全0行值
movdx,io8255a;
A读入列值
andal,00111111b
cmpal,00111111b;
是否有键按下
jzlp1;
同je,=转移，ZF=1
;
有键按下，则A0到A3逐位变换仅有一位为0的行值后读取列值，不全为1的确定键值
movah,0feh
movcx,4
BCA:
moval,ah
andal,0fh
cmpal,0fh
jnzrealy;
，即有键按下，确定键值
rolah,1;
左移，ror右移
loopBCA
jmplp1
movbl,al
realy:
pushax
nop
!
=转移，同jne
popax
movcx,4;
辅助设备输出
moval,bl
l4:
movcx,6
lp4:
shral,1;
右移
jnclp2;
前次操作无进位转移,cf=0
incsi;
+1
looplp4
lp2:
movcx,4;
控制台输入/输出
lp20:
shral,1
jnclp3
incdi
looplp20
lp3:
movbx,di
moval,6
mulbl;
无符号数乘法->
ax
addax,si
disp:
movbx,offsetkey
movdh,0
movdl,al
jmplp0
delayprocfare
pushcx
movcx,20h
L1:
loopL1
popcx
8255交通灯控制,8255CS接288-28FH，PC0-PC7接L0-L7
io8255cequ28Ah
io8255zequ28Bh
stack1segmentparastack
stack1ends
data,ss:
stack1
moval,90h
lop:
moval,00100001b;
南北绿，东西红
movcx,20000
de1:
movdi,9000
de0:
decdi
jnzde0
loopde1;
movcx,2000长延时
movbx,6
e1:
moval,10000001b;
。
黄，。
红
movcx,2000
de3:
de2:
jnzde2
loopde3
moval,01h;
灭，。
loopde1
cmpbx,3
jnze1
moval,01000100b;
红，。
绿
de5:
de4:
jnzde4
loopde5
e2:
moval,01000010b;
黄
de7:
de6:
jnzde6
loopde7
moval,01000000b;
灭
de9:
de8:
jnzde8
loopde9
cmpbx,0
jnze2
jmplop
循环显示00-99,8255CS接288-28FH，PA0-PA6接a-g,PC0-PC1接驱动S0-S1,数码管驱动端dp接GND
io8255bequ289h
leddb3fh,06h,5bh,4fh,66h,6dh,7dh,07h,7fh,6fh;
段码
buffer1db0,0;
显示的数
bzdw01,00;
位码?
moval,80h
movdi,offsetbuffer1
loop1:
movcx,050h;
循环次数
loop2:
movbh,02;
显示位数
movbyteptrbz,bh
pushdi
decdi;
-1
adddi,bz
movbl,[di];
bl要显示的数
popdi
moval,3;
清数码管
movbh,0
movsi,offsetled;
addsi,bx
moval,byteptr[si]
moval,byteptrbz
pushcx
movcx,3000
delay:
loopdelay
movbh,byteptrbz
shrbh,1;
jnzlll
looploop2
movax,wordptr[di]
cmpah,15
jnzset
cmpal,15
movax,0000
mov[di],al
mov[di+1],ah
jmploop1
set:
jneexit;
有键按下转exit
incal
aaa
mov[di],al;
个位
mov[di+1],ah;
十位
moval,3
8255综合实验,8255CS接288H，PB0-PB7接a-g,PC0-PC3接键盘行POW0-POW3,PA0-PA3接键盘列SER0-SER3
leddb3fh,06h,5bh,4fh,66h,6dh,7dh,07h,7fh,6fh,77h,7ch,39h,5eh,79h,71h
用于显示数码管的位置
andal,0fh;
保留低四位有效值
！
=，即有键按下，确定键值
looplp2
pushax
movdx,io8255a
jnclp4
incsi
looplp3
lp5:
jnclp6
looplp5
lp6:
mulbl
cmpal,39h
jlll
cmpal,40h
jglll
movdx,io8255b
subal,41h
movbx,offset[led+10]
movcx,400h
l2:
loopl2
delayend_
8253脉冲计数，8253CS接280-287H，CLK0接PULSE1+,GATE0接+5V，OUT0接逻辑笔，8255CS接288-28FH，PC0-PC5接L0-L5
timer_ct1equ283h
timer0equ280h
io8255cequ28ah
movdx,timer_ct1
moval,00010000b
movdx,timer0
moval,8
display:
movdx,timer_ct1
moval,00000000b
movbl,al
subal,bl
jzdisplay
endstart
8253可编程时钟发生器,8253CS接280-287H，CLK0接1MHZ，GATE0接+5V，OUT0接CLK1,GATE1接+5V，OUT1接L0
timer0equ280h
timer1equ281h
mode03equ36h
mode12equ76h
moval,mode03
movax,1000;
计数初值
moval,mode12
movdx,timer1
movax,200
8253继电器，8255CS接288-28FH，PA0接8253的OUT1,,PC0接继电器模块IK,8253CS接280-287H，CLK0接1MH,GATE0接+5V，OUT0接CLK1,GATE1接+5V
timerct1equ283h
ll1:
moval,0;
PC0复位，继电器断开
moval,1;
PC0复位，继电器闭合
jmpll1
pushdx
movdx,timerct1
moval,36h
movax,10000
moval,70h
movax,300
ll2:
movah,06
jneexit
andal,01
jzll2
popdx
8253电子琴，8255CS接288-28FH，PA0接逻辑门AND_A,PA1接8253的GATE0,8253CS接280-287H，CLK0接1MHZ，OUT0接逻辑门AND_B,AND_Y接NOT，NOT_Y接音响合成模块的INPUT引脚。
tabledw524,588,660,698,784,880,988,1048;
高音
tabledw262,294,330,347,392,440,494,524;
低音
msgdb'
Press1,2,3,4,5,6,7,8,ESC:
movdx,offsetmsg
movah,9
int21h;
显示提示信息
sing:
movah,7
cmpal,1bh
jefinish
1'
jlsing
8'
jgsing
subal,31h
shlal,1;
左移
movax,4240h
movdx,0fh
divwordptr[table+bx]
movbx,ax
moval,00110110b
movax,bx
moval,10000000b
moval,03h
moval,0h
jmpsing
finish:
movax,4ch
pushax
movax,15
x1:
movcx,0ffffh
x2:
deccx
jnzx2
decax
jnzx1
d
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