ASM Community

Hello,
I need to write a simple counting program using MASM but as a true newbie, I'm not sure where to begin.
Assembly language is not like anything I used before (C++.. etc)

Thanks
Nyjc,

Ps. Please forgive me if this is not the correct forum for this question...

Thanks... basically what I need to do is write a small program, which contains a loop increasing the numbers starting at 0.

so, O + 1 etc.

Thank you again

Okay... thank you.

I read all the related documents... BTW great site...
I still have some questions...

basically, I know how to initiate the program, up until the point where I write mov ax, @data
I then try to write the following

mov ax, 0 ;moving the number 0 into ax.
mov ??? ; I want to display the zero here...
inc ax; this should increment by one (Is this correct...) What next...

Again thank you

Hi nyjcr,

Here is a counter demo. The PrintDec routine is coded by MichaelW from masmforum.

.model small,stdcall



PrintDec PROTO :WORD



.stack

.code

start:

	xor	cx,cx ; set cx to 0

@@:	

	inc	cx ; increment cx

	push	cx ; preserve cx as it's used by PrintDec

	invoke	PrintDec,cx

	mov	ah,2

	mov	dl,13

	int	21h ; put CR+LF

	mov	ah,2

	mov	dl,10

	int	21h

	pop	cx

	cmp	cx,10 ; Is cx equal to 10 ?

	jne	@b  ; If not jump back to process cx

	mov	ah,04Ch

	int	21h



PrintDec PROC numb:WORD 

	mov	ax,numb   

; 

   ; Init divisor. 

	mov	bx,10 

   ; Zero digit counter. 

	mov	cx,0 

@@: 

   ; Zero MSW of dividend. 

	mov	dx,0 

   ; Divide value by 10. 

	div	bx 

   ; Push remainder. 

	push	dx 

   ; Increment digit count. 

	inc	cx 

   ; Repeat if quotient > 0. 

	or	ax,ax 

	jnz	@B 

@@: 

   ; Pop digit off stack. 

	pop	dx 

   ; Convert to ascii. 

	add	dl,30h 

   ; Display. 

	mov	ah,2 

	int	21h 

   ; Repeat CX times. 

	loop	@B 

	ret 

PrintDec ENDP



END start