Write an assembly language program (Intel 8086) to READ A STRING, CONVERT IT INTO UPPER CASE AND FINALLY DISPLAY THE CONVERTED STRING
title ALP to read a string, convert it into upper case and display the converted string
dosseg
.model small
.stack 100H
.code
main proc far
mov ax, @data ; initialize ds register
mov ds, ax
mov ah, 0ah ; read string
lea ax, param
int 21h
mov bx, 00 ; convert to upper string
mov cx, act_len
L2: mov ah, str [bx]
cmp ah, 41h
jb L1
cmp ah, 51h
ja L1
XOR ah, 00100001B
mov str [bx], ah
L1: inc bx
loop L2
mov ah, 02h ; display newline
mov dl, 0a
int 21h
mov ah, 09h ; display string
lead dx, str
int 21h
mov ax, 4C00H ; return to DOS
int 21H
main endp
.data
| param | label | Byte |
| max_men | db | 60 |
| act_len | db | ? |
| str | db | 60 dup(?) |
end main