Date: Mon, 07 Oct 1996 16:26:00 +0000
From: Bill Currie <billc AT blackmagic DOT tait DOT co DOT nz>
Subject: Re: The first problem (a horror series in 10 parts)
To: Kim Robert Blix <norsk AT interlink DOT no>
Cc: djgpp AT delorie DOT com
Message-id: <32592F18.17DC@blackmagic.tait.co.nz>
Organization: Tait Electronics NZ
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References: <539hek$6vf AT ranger DOT interlink DOT no>

Kim Robert Blix wrote:
> 
> Hi there.. I've just started to use djgpp. (Made hello world yesterday, and
> it was only 80kb hehe.) And I've encountered a problem..
> 
> Why doesnt this work?:
> 
> asm(" movw $13,%ax
>       int $10
>     ");
> 
> Asm I'm sure you can see, this is supposed to be a no-trouble, basic
> mode change to 320*200*256 chunky style, but I get a hang instead.
> 
> Any help on this would be greatly appreciated, and a sample procedure
> for regular mode change (no vesa), would grant you my eternal love.
> 
> Thank you in advance.

Pretty basic, really.  You gave decimal numbers when you want hex... 

Change your code to:

 asm(" movw $0x13,%ax
       int $0x10
     ");

and it will work as expected (btw you can also use 0b00010011 in your asm code)

Bill