I have some problems with masm

Question

I have some problems with masm when I want to run:

CSEG segment
org 100h

Begin:
    mov ah, 9 
    mov dx, offset Message
    int 21h
    ;mov ah, 9 
    ;mov dx, offset mess2
    ;int 21h

    int 20h
mess2 db 'It is me$'
Message db 'Hello, World2243!$'
CSEG ends
end Begin

It prints:

Smth like: ||=It's me!

But I commented this string out!! I compile this code on DosBox, maybe that's the cause

Answer 1

As already mentioned, you use tasm, not masm. These are two different things, see tasm and masm
In order to print two lines, I used the code:

MODEL   TINY
STACK 100h  
DATASEG
    Hellostr DB 'Hello First Step Site $'
    str2     DB 'Step 16 $'
CODESEG     
start:  
    mov ax,@data
    mov ds,ax
    mov dx,offset Hellostr               
    mov ah,09h
    int 21h
    mov dx,offset  str2
    mov ah,09h
    int 21h
    mov ah,04Ch
    mov al,1h
    int 21h
end start

compile + build + run:

mount c C:\path\to\asm\file\PROGRA~1.asm
c:
tasm PROGRA~1.asm
tlink /3 PROGRA~1.obj 
PROGRA~1.exe

result:link
I will also note, as indicated in the screenshot above, I have a dosbox version 0.74-3
And lastly: I advise you to look VERY carefully at the screenshot you provided.