Problem outputting strings

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Yawgmoth

Joined: 20 Aug 2003
Posts: 37

Yawgmoth 22 Aug 2003, 08:17

My program is as follows:

Code:


mov dx,msg
mov ah,9
int 21h ;Prints message
mov ah,8
int 21h    ;Inputs character
mov dx, mg
mov ah,9
int 21h   ;Prints 2nd message
mov dl,al
mov ah,2
int 21h  ;Prints character entered
mov ah,4Ch
int 21h    ;Quits


msg db 'Enter a character $'
mg db 'You entered: $'

Its output is a bunch of nontypable characters, followd by "Enter a character:". Then, after I enter a charcter, it prints out more gibberish.

22 Aug 2003, 08:17

keyoke

Joined: 18 Jun 2003
Posts: 56
Location: London

keyoke 22 Aug 2003, 08:59

this mite work not the best way but it works.

Code:

org 100h
use16

mov dx,msg
mov ah,9
int 21h ;Prints message

mov ah,8
int 21h    ;Inputs character

push ax

mov dx, mg
mov ah,9
int 21h   ;Prints 2nd message

pop ax
mov dl,al
mov ah,2
int 21h  ;Prints character entered

mov ah,4Ch
int 21h    ;Quits


msg db 'Enter a character ',24h
mg  db 'You entered:',24h

22 Aug 2003, 08:59

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8358
Location: Kraków, Poland

Tomasz Grysztar 23 Aug 2003, 23:01

Or you can add the following lines at the beginning of your source:

Code:

format MZ
push cs
pop ds

It depends whether you want to make EXE-style or COM-style program.

23 Aug 2003, 23:01

Yawgmoth

Joined: 20 Aug 2003
Posts: 37

Yawgmoth 23 Aug 2003, 23:22

Thanks for your help guys.

23 Aug 2003, 23:22

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