8086 Assembly Language Programming Tutorial | Count vowels from string and Display
Here i have explained the 8086 program to count the vowel from string. This is a detailed explaination so you will learn few more topic like division in 8086, dos interrupt in 8086 and many more.
The video is quite long but if you are really concerned about the program then this may be helpful.
Source code
.model small
.stack 64
.data
paralist label byte
maxlen db 20
actuallen db ?
kbinput db 20 dup('?')
vowel db 'aeiouAEIOU'
prompt db 'Input Name','$'
.code
main proc far
mov ax,@data
mov ds,ax
call display_msz
call reads
call count
call display
mov ax,4c00h
int 21h
main endp
display_msz proc near
mov ah,09
lea dx,prompt
int 21h
ret
display_msz endp
reads proc near
mov ah,0ah
lea dx,paralist
int 21h
ret
reads endp
count proc near
lea si, kbinput
mov bh,actuallen
mov dx,00h
back1: lea di,vowel
mov bl,0ah
mov al,[si]
back: cmp al,[di]
jnz fwd
inc dx
fwd: inc di
dec bl
jnz back
inc si
dec bh
jnz back1
ret
count endp
display proc
mov al,dl
mov ah,00h
mov cx,0ah
mov bx,00000h
up: mov dx,0000h
div cx
add dx,30h
push dx
inc bx
cmp ax,00h
jne up
mov cx,bx
mov ah,02
x1: pop dx
int 21h
loop x1
ret
display endp
Playlist of the 8086 series
• Microprocessor 8086
Timing diagram 8085
• Timing Diagram 8085
8085 programming
• Microprocessor 8085