Sender: nate AT cartsys DOT com
Message-ID: <3775C5FF.3A47491C@cartsys.com>
Date: Sat, 26 Jun 1999 23:34:39 -0700
From: Nate Eldredge <nate AT cartsys DOT com>
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To: djgpp AT delorie DOT com
Subject: Re: Some nice questions!! (one of them is silly!)
References: <19990626185136 DOT 11144 DOT rocketmail AT web601 DOT yahoomail DOT com>
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Reply-To: djgpp AT delorie DOT com

Mohamed Saad wrote:
> 
> Hi all,
>    how are u? hope u r all very fine!
> 
>    hmmm... just some small questions...
>    1) if i declare 2 global arrays as follows...
>        char ar1[100];
>        char ar2[20];
>     will djgpp ALWAYS store ar2 exactly after ar1???
>    i.e. will the expression ar2[-1] always return
> ar1[99]??

For practical purposes, no.

I think it does at present but it isn't safe to count on it.

>    2) what are registers that i can safely change in
> my assembler function without having to push its
> values?

eax, ecx, edx.
 
>    3) in djgpp progs, does djgpp make the register es
> equal to ds?? ALWAYS??

Yes, unless you've changed one explicitly.

>    4) i wrote a program today which exited with an
> error message being printed repeatedly forever, then
> the system restarted! I can't remember the error
> message exactly! but, i remember it was sthg like
> "Exiting due to Unknown Signal Handler". what does
> this mean?

I don't know.  Can you reproduce it, and get more details?
-- 

Nate Eldredge
nate AT cartsys DOT com