Print Page - Several variables in Data Segment

Title: Several variables in Data Segment
Post by: hywum on December 25, 2011, 10:16:35 PM

Hi,

I'm a beginner of 16-bit programming and have a problem that I'm not able to give account.
There are no errors, but there is alway printed "You pressed 'i'.".
This is my code:

Code Select


DATA SEGMENT
	Message db "You pressed 'i'.", "$"
	Message2 db "You didn't press 'i'", "$"
DATA ENDS

CODE SEGMENT
		ASSUME CS:CODE, DS:DATA
		start:
		
		mov ah, 0
		int 16h ; al = pressed key
		
		cmp al, 'i'
		jne ng
		
		g:
			mov dx, offset Message
			mov ah, 9
			int 21h
			jmp _end
		ng:
			mov dx, offset Message2
			mov ah, 9
			int 21h
			jmp start
		_end:
			mov ah, 0
			int 16h
		
			mov ah, 4Ch
			int 21h	
CODE ENDS
	END start

Thx for your replies

Title: Re: Several variables in Data Segment
Post by: jj2007 on December 25, 2011, 10:38:55 PM

Assume is not sufficient - you need to load the register.

Code Select

start:
  mov ax, @DATA	; set the DS register to DGROUP
  mov ds, ax		; for ds:si (lods)

Check also the macros included in DosBasic (http://www.masm32.com/board/index.php?topic=17991.msg151620#msg151620).

Title: Re: Several variables in Data Segment
Post by: hywum on December 25, 2011, 10:45:52 PM

Wow, this is great, it works fine. :)
Thank you very much! :U

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Miscellaneous Forums => 16 bit DOS Programming => Topic started by: hywum on December 25, 2011, 10:16:35 PM