[8086 DOS] How to make a simple printing program.

; Define program model and data stack
; 100h means our stack is 100 bytes long.
.model small
.stack 100h

.data
    ; Allocate bytes under the name "hello" end with byte $ because the dos print interrupt
    ; Needs to know when to stop printing the string, $ is that indication.
    hello db 10,13,'This is my first printed string!$'
.code
    ; Load our data segment into our ds register.
    mov ax, @data
    mov ds, ax
    ; Prepare our print interrupt
    mov ax, 09h
    ; Load into the DX register (Data MSB/LSB) -> DS:(hello)
    ; Our data segment + the offset of where our hello is located. (Similar to a pointer)
    lea dx, hello
    ; Interrupt into DOS and call our print function.
    int 21h
    ; We need to return the control back to dos so our program doesn't freeze when it ends.
    mov ah, 4ch
    int 21h
    ; And that's how you print a simple string in 8086 ASM xD
end