Glenn's Space: Assembly Language 8086 determine if a character is capital or small

Assembly Language 8086 determine if a character is capital or small

Wednesday, August 1, 2012 Posted by Glenn

;SA LAHAT NG KOKOPYA DITO SA GAWA KO: DAPAT UMATTEND KAYO NG ASSEMBLY TUTORIAL KO SA MONDAY HA? :)
;BASTA CPE PROF NYO, EXCUSE KAYO DUN! :) PROMISE. MADAMI KAYONG MATUTUTUNAN SAKIN. :)
;DETERMINE IF THE INPUT CHARACTER IS A CAPITAL OR SMALL CHARACTER
;PROGRAM BY: GLENN VON C. POSADAS
;WWW.GLENNVON.COM

@pc macro char
mov ah,02h
mov dl,char
int 21h
endm

@ps macro st
mov ah,09h
lea dx,st
int 21h
endm

cseg segment para 'code'
assume cs:cseg;ss:cseg;ds:cseg;es:cseg
org 100h

start: jmp begin

dianarose db ?
str1 db 'Input a character: $'
str2 db 10,13,'character is a small letter $'
str3 db 10,13,'CHARACTER IS A CAPITAL LETTER$'

begin:
mov ax,03h ;clear
int 10h  ;clear

@ps str1 ;input a char

mov ah,01h ;interrupt for inputing a char
int 21h

mov dianarose,al ;put the character from al register to dianarose variable

cmp dianarose, 64
jle exit ;if below 64, terminate

cmp dianarose,90
jle capital_letter ;if 65-90, then it is capital

cmp dianarose,96
jle exit ;terminate if special character

cmp dianarose, 122;compare if the character inside the dianarose variable is less than or equalto 97(ASCII)
jle small_letter ;if 97 to 122, then it is small

cmp dianarose,123
jge exit ;if 123 or greater, terminate the program

capital_letter:
@ps str3
jmp exit

small_letter:
@ps str2
jmp exit

exit:

int 20h
cseg ends
end start

additional tags: determine if the character is small or capital, assembly programming 8086 sample program, character tutorial in assembly program language 8086, determine if capital or small characters in assembly 8086

Author: Glenn Posadas

20 year old 5th year Computer Engineering Student, a blogger, photographer, programmer, and an electronics hobbyist; a Christian who loves God very much..

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