Message-Id: <3.0.6.32.19990101154321.007a0d10@tenforward.com>
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Date: Fri, 01 Jan 1999 15:43:21 -0800
To: djgpp AT delorie DOT com
From: Mad Cow <sw AT tenforward DOT com>
Subject: Extended Stupid Question(with source)
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Reply-To: djgpp AT delorie DOT com

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okay, here is my code w/poblem:


>i earlier reported an error dealing with cwsdpmi*b, well i found it on the
>net..
>and now all i get when trying to run my program is :
>* in windows i get a system fault error and it shuts the dos prompt down.
>
>* in dos only mode i get something like this:
>
>Shutting Down Allegro
>Exiting due to SIGSEGV
>Page Fault at eip00001fe1, error 0004
>
>
>***extended hex address numbers here***
>and then it goes back to the prompt.
>
>
>so, is it allegro? is it my programming? is it my machine? (i.e. bad
>sowftware)


might be your code. try post it if it isn't too big. I think you should try
to localize where it halts. put exit(0); in your code. Move it forwards
until you get the error.

>what? thanks for your time.
>
>



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#include <allegro.h>
#include "tutorial.h"


#define MIN_Y 8
DATAFILE*data;

BITMAP*backdrop,*framebuf;
int X=0,Y=100;


int main(){ 
allegro_init();
install_keyboard(); 
initialise_joystick(); 
 
 data=load_datafile("alien.dat");

  set_gfx_mode(GFX_VGA,320,200,0,0); 
  set_palette((RGB*)data[DAT_GAMEPAL].dat);
 
 // create 320x192 backdrop backdrop=create_bitmap(320,192);
 for (int Y=0; Y<128; Y++) hline(backdrop,0,Y,319, (Y/2)+128);
 for (int Y=128; Y<192; Y++) hline(backdrop,0,Y,319, ((Y-128)/2)+192);
 
 // create 320x200 double buffer framebuf=create_bitmap(320,200);
 clear(framebuf); while (!key[KEY_ESC]) 
 {  // build frame
  blit(backdrop,framebuf,0,0,0,MIN_Y,320,200);
  draw_rle_sprite(framebuf,(RLE_SPRITE*)data[DAT_ALIEN].dat,X,Y);
 
  // display frame  
  vsync();  
  blit(framebuf,screen,0,0,0,0,320,200);
  // get user input  
  poll_joystick();  
  if (key[KEY_LEFT]||joy_left) X--;
  if (key[KEY_RIGHT]||joy_right) X++;  
  if (key[KEY_UP]||joy_up) Y--;
  if (key[KEY_DOWN]||joy_down) Y++; 
  } 
  return 0;
  }


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sw AT tenforward DOT com
http://come.to/NCI
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