From: ajps AT mail DOT telepac DOT pt (aperes)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: SIGSEGV
Date: Fri, 10 Sep 1999 21:11:08 GMT
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

On Thu, 9 Sep 1999 13:28:34 +0200 (IST), Eli Zaretskii
<eliz AT is DOT elta DOT co DOT il> wrote:

>
Thank for your help... but i can't do what i want!
I have read the all FAQ file (specialy the section 18), I have try
many things, but the result is a computer crash

I need invoke a function of a sound driver (int 66h). To do
this I must pass the ADRESS of a sound structure.
The sound structure is:

typedef struct_typ {
unsigned char *sound; // MUST BE OFFSET SEGMENT IN 1MB ADRESS SPACE.
(I DON'T KNOW DO THIS...)
unsigned shor sndlen; // lenght of audio sample. < 64k
short *IsPlaying; //Adress of play status flag.REAL PTR
OFFSET:SEGMENT!!.( I DON'T KNOW DO THIS...)
short frequency; //Playback frequency
} sndstruct;

The function is:

INPUT AX=0x688;
            ESI = points to flat model adress in the first 1MB to the
sound struct.

What i have tried:

sndstruct the_sound;
__dpmi_regs r;

.....................

s_ptr = (unsigned char *) malloc(size_of_file);
linear_adress = 16 * __dpmi_allocate_dos_memory((size_of_file+15) >>
4, selector);
dosmemput(s_ptr, size_of_file, linear_adress);

the_sound.sound = linear_adress; (It's correct?)
the_sound.sndlen = size_of_file;
the_sound.Isplaying = ? (I don't know how to do...REAL PTR OFF:SEG!!)
the_sound.frequency = 10000;

..................

/* pass the struct to adress in the first 1MB as required
movedata(_my_ds(), (int) &the_sound, _dos_ds, __tb,
sizeof(the_sound));

r.x.ax = 0x688;
r.d.esi = __tb;

__dpmi_int(0x66, &r);

....


RESULT: COMPUTER CRASH!

Excuse me the length of this message, my terrible english.
Thanks in advance!

Aperes