Assembly program that finds second smalest value in array - arrays

Question

this is my code that supposed to sorting the array in the way that to find the smallest number but when I'm running that on the 8086 assembly I don't see any result or any thing else but I guess the problem is that my code cannot get out of the loop or something like that is that right?
again I'm saying that the problem on my code is that it doesn't show any result on the window and my program must find the second smallest number in the array.can someone help me to fix the it?
org 100h
; add your code here
DATA SEGMENT
ARR DB 5,3,7,1,9,2,6,8,4
LEN DW $-ARR
SMALL DB ?
SECOND DB ?
DATA ENDS
CODE SEGMENT
ASSUME DS:DATA CS:CODE
START:
MOV AX,DATA
MOV DS,AX
LEA SI,ARR
MOV AL,ARR[SI]
MOV SMALL,AL
MOV CX,LEN
REPEAT1:
MOV AL,ARR[SI]
CMP SMALL,AL
JL NOCHANGE
MOV SMALL,AL
NOCHANGE:
INC SI
LOOP REPEAT1
LEA SI,ARR
MOV AL,ARR[SI]
MOV SECOND,AL
MOV CX,LEN
REPEAT2:
MOV AL,ARR[SI]
CMP SECOND,AL
JL SKIP
CMP SMALL,AL
JGE SKIP
MOV SECOND,AL
SKIP:
INC SI
LOOP REPEAT2
MOV AH,4CH
INT 21H
CODE ENDS
END START
ret

Answer 1

I'm wondering at this point in your class if you are supposed to be able to output numbers as opposed to looking at register values while running a debugger.
As an alternative, insert the commented line into your code to return the value as an error code:
LOOP REPEAT2
MOV AH,4CH
MOV AL,SECOND ;insert this line
INT 21H
CODE ENDS
END START
After assembling and linking the program, run it from a DOS console window (Command prompt). Assume you named it "myprogram.com". Then use these commands:
myprogram
echo %errorlevel%
The errorlevel is the value in AL when using AH=4CH and INT 21H. This only works for single byte values, but that's what you have in this case.
Otherwise you would have to add code to convert the value to decimal and output the result. If these are singe digit values, then the output code is simple:
MOV DL,SECOND
ADD DL,030H
MOV AH,002H
INT 21H
MOV DL,00DH
MOV AH,002H
INT 21H
MOV DL,00AH
MOV AH,002H
INT 21H
or use a string:
SECOND DB ?
STRNG DB 000H,00DH,00AH,'$' ;insert this line
...
MOV AL,SECOND
ADD AL,30
MOV STRNG,AL
MOV DX,OFFSET STRNG
MOV AH,009H
INT 21H