Message-ID: <3D20F4E0.90907@calixo.no-really.net>
Date: Tue, 02 Jul 2002 02:33:36 +0200
From: David Anderson <david DOT no-spam DOT anderson AT calixo DOT no-really DOT net>
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Newsgroups: comp.os.msdos.djgpp
Subject: Re: Pointer arithmetics
References: <3D205E79 DOT 7020104 AT calixo DOT no-really DOT net> <ui14i9lus6d05 AT news DOT supernews DOT com>
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

>>So I decided I'd have a go at converting the
>>linear address to seg:offset for the ISR.
>
> don't.  use the routine provided by djgpp.

*kicks himself for not RTFMing properly*

Thanks for the pointer.

One more question however: I have an assembly file (compile to object 
code with tasm), and I want to link it against C source code. From what 
I understand, I must declare the ASM functions as extern in the C code, 
declare the function global in the ASM code (not forgetting to prefix 
the _), and let her rip.

However, I'd like this ASM routine to modify a statically defined 
variable, called mouse_state_changed (unsigned char). How do I make it 
accessible in the ASM file? Declare it as 'extern mouse_state_changed' 
and then refer to [mouse_state_changed], or do I need to invoke further 
magic?

Thank you for being patient with me, as I'm sure the answer is in a 
manual I missed somewhere.

David Anderson