; Information
; ßßßßßßßßßßß
;
;  Program Title : NASM-IDE .COM executable file demo
;  External name : BINTEST.COM
;  Version       : 1.0
;  Start date    : 21/12/1997
;  Last update   : 21/12/1997
;  Author        : Rob Anderton
;  Description   : A simple example of a DOS .COM file programmed using
;                  NASM-IDE 1.1 and NASM 0.95.


[BITS 16]                    ; Set 16 bit code generation
[ORG 0x0100]                 ; Set code start address to 100h (COM file)

[SECTION .text]              ; Section containing code

    jmp    START             ; Jump to label 'START' in .text section

END:	                     ; Define label 'END'

    mov    ax, $4C00         ; This function exits the program
    int    $21               ; and returns control to DOS.

START:	

    mov    BYTE [bss_sym], 'I'   ; Reference a symbol in the .bss section
    mov    bx, [bssptr]	         ; Reference a symbol in the .data section
    mov    al, [bx]
    mov    bx, [DATAPTR]	
    mov    [bx], al
    mov    cx, 2

.LOOP:                           ; Define a local label

    mov    dx, datasym	
    mov    ah, 9
    push   cx
    int    $21
    pop    cx
    loop   .LOOP		
    mov    bx, [textptr]	
    jmp    bx


[SECTION .data]                 ; Section containing initialised data

datasym	  db 'NASM-EDE!', 13, 10, '$'
bssptr	  dw bss_sym		
DATAPTR	  dw datasym + 5	
textptr	  dw END	        ; Pointer to a label in the .text section


[SECTION .bss]                  ; Section containing unitialised data

bss_sym	  resb 1		; Reserve 1 byte of data