.model tiny
.data
array1 db 91h, 02h, 083h, 0Ah, 047h, 012h, 076h, 61h
result db 10 DUP(?)
.code
.startup
    lea si, array1
    lea di, result
    mov cx, 8
    mov bl, 45h
X1:
    cmp cx, 0
    jz X2
    mov al, [si]
    cmp al, 0Ah
    je Replace
    mov [di], al
    inc si
    inc di
    dec cx
    jmp X1
Replace:
    mov al, 'E'      ; replace 0Ah with 'E'
    mov [di], al
    inc di
    dec cx
    jmp X1
X2:
    ; program ends here
end