code_case_conversion.asm

.model small
.stack 100h

.data

a db ?
.code

main proc 
     
    
FIRST:
    mov ah, 1
    ; call emulator stdout
    int 21h
     
    mov a, al        
 
     
    cmp a,41h
    JGE CAPITAL 

    jmp exit
    cmp a,61h   
    JGE SMALL
    jmp exit
    
     
    

SMALL:


    mov a, al
    mov bl, a
    sub bl, 31h 
    jmp OUTPUT  
    
    
CAPITAL:   



    mov a, al
    mov bl, a
    sub bl, 11h   
    jmp OUTPUT 
    
OUTPUT:
           
    
    mov ah, 2
    mov dl, '1'
    int 21h    
    
    
   
    mov dl, bl
    int 21h       
    
exit:    
    mov ah, 4ch
    mov al, 0  
    int 21h
       
    
main endp

end main