Date: Sun, 7 Aug 94 23:47:24 EDT
From: peprbv AT cfa0 DOT harvard DOT edu (Bob Babcock)
To: pochanay AT cae DOT wisc DOT edu
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: Re: How do I ...?
Reply-To: babcock AT cfa DOT harvard DOT edu

> 1)  How do I get int86x to work without crashing when passing an
>     address to an interrupt in real-mode.  The one I am having trouble with
>     is video interrupt 10 function 10 subfunction 12 (all hex) which
>     is used to set a range of DAC registers.

If this function is not supported by GO32, you have to use
_go32_dpmi_simulate_int to execute it in real mode.

> 2)  How do I get DJGPP not to pad a structure like this:
> struct {
>     SHORT  a;
>     LONG   b;
>     SHORT  c;
>        }

Try something like:
struct {
    SHORT  a __attribute__ ((packed));
    LONG   b __attribute__ ((packed));
    SHORT  c __attribute__ ((packed));
       }
(I think I got the syntax right; I couldn't find any examples on my home
machine, but I have used the packed attribute in the past.)