flat assembler - Opening a file - obtainig carry and don't know why

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StrenoJr

Joined: 13 Mar 2014
Posts: 22
Location: Slovakia

StrenoJr

Hi, I am getting carry on opening a file with this code

Code:

org 100h
use16
mov ax, 0x3D02; reading
mov dx, filename;
int 0x21;     
filename db "FILE.TXT", 0;

I think it's correct but as it doesn't works I am not sure.
returns 0x02 in ax.
The file exists and I also tried creating a new file with a different name (returns carry too).
The rest of the code is not posted because it throws an error here - at the top.

24 Mar 2014, 20:25

AsmGuru62

Joined: 28 Jan 2004
Posts: 1464
Location: Toronto, Canada

AsmGuru62

Maybe the current directory is not what you think it is?
Try to include a path into file name.

24 Mar 2014, 21:28

freecrac

Joined: 19 Oct 2011
Posts: 117
Location: Germany Hamburg

freecrac

Or the address in the datasegmentregister is wrong.
DS:DX -> ASCIZ filename

Error code:
02h (2) file not found

Dirk

25 Mar 2014, 09:29

badc0de02

Joined: 25 Nov 2013
Posts: 215
Location: %x

badc0de02

is the file too large does the random access memory a carry out?

29 Mar 2014, 07:13

DOS386

Joined: 08 Dec 2006
Posts: 1898

DOS386

> mov ax, 0x3D02; reading

try MOV AX,$3D00 ; READ ONLY http://www.delorie.com/djgpp/doc/rbinter/id/90/27.html

29 Mar 2014, 08:10

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