; multi-segment executable file template.

data segment
    ; add your data here!

ends

stack segment
    dw   128  dup(0)
ends

code segment
start:
; set segment registers:
    mov ax, data
    mov ds, ax
    mov es, ax

    ; add your code here
    ; vnes od tastatura
    mov ah, 01h
    int 21h

    ; vnesot od tastatura se zachuvuva vo al
    mov bl, al

    ; proverka za vneseniot karakter
    cmp al, 65d
    ; ako e pomalo od 65 ne e zadovolen uslovot odi na else
    jb else
    cmp al, 90d
    ja proverka2
    jmp memorija


    proverka2:
    ; proverka za vneseniot karakter
    cmp al, 97d
    ; ako e pomalo od 97 ne e zadovolen uslovot odi na else
    jb else
    cmp al, 122d
    ja else ; ne e vo opseg

    ;smesti ja bukvata vo memorija
    memorija:
    mov bx, 20h
    mov [bx], al


    add al, 1d
    ; sledna bukva
    cmp al,122d
    ja prethodna

    cmp al,97d
    jb prethodna

    mov si,21h
    mov [bx][si],al

    prethodna:
    sub al,2d
    cmp al,65d
    jb else
    cmp al,97d
    jb else

    mov [1fh],al


    else:
    ; greshen vnes

    mov ax, 4c00h ; exit to operating system.
    int 21h


ends

end start ; set entry point and stop the assembler.