arch/dos/init.c

   1 #include <conf.h>
   2 #ifdef __ENV_DJGPP__
   3
   4 #include <stdio.h>
   5 #include <string.h>
   6 #ifdef __DJGPP__
   7 #define _BORLAND_DOS_REGS 1
   8 #endif
   9 #include <dos.h>
  10
  11 #include "../../main/inferno.h"
  12 #include "../../main/text.h"
  13 #include "console.h"
  14 #include "args.h"
  15 #include "error.h"
  16
  17 #include "joy.h"
  18 #include "timer.h"
  19 #include "key.h"
  20 #include "mono.h"
  21 #include "u_dpmi.h"
  22 #include "mouse.h"
  23
  24 //added on 9/15/98 by Victor Rachels to add cd controls
  25 //#include "bcd.h"
  26 //end this section addition - Victor Rachels
  27
  28
  29 void install_int3_handler(void);
  30
  31 #ifdef __WATCOMC__
  32 int __far descent_critical_error_handler( unsigned deverr, unsigned errcode, unsigned far * devhdr );
  33 #endif
  34
  35 #ifndef NDEBUG
  36 #ifdef __WATCOMC__
  37 void do_heap_check()
  38 {
  39         int heap_status;
  40
  41         heap_status = _heapset( 0xFF );
  42         switch( heap_status )
  43         {
  44         case _HEAPBADBEGIN:
  45                 mprintf((1, "ERROR - heap is damaged\n"));
  46                 Int3();
  47                 break;
  48         case _HEAPBADNODE:
  49                 mprintf((1, "ERROR - bad node in heap\n" ));
  50                 Int3();
  51                 break;
  52         }
  53 }
  54 #endif
  55 #endif
  56
  57
  58
  59 #ifdef VR_DEVICES
  60 int is_3dbios_installed()
  61 {
  62         dpmi_real_regs rregs;
  63         memset(&rregs,0,sizeof(dpmi_real_regs));
  64         rregs.eax = 0x4ed0;
  65         //rregs.ebx = 0x3d10;
  66         dpmi_real_int386x( 0x10, &rregs );
  67         if ( (rregs.edx & 0xFFFF) != 0x3344 )
  68                 return 0;
  69         else
  70                 return 1;
  71 }
  72 #endif
  73
  74 // Returns 1 if ok, 0 if failed...
  75 int init_gameport()
  76 {
  77         union REGS regs;
  78
  79         memset(&regs,0,sizeof(regs));
  80         regs.x.eax = 0x8400;
  81         regs.x.edx = 0xF0;
  82         int386( 0x15, &regs, &regs );
  83         if ( ( regs.x.eax & 0xFFFF ) == 0x4753 /*'SG'*/ )
  84                 return 1;
  85         else
  86                 return 0;
  87 }
  88
  89 void check_dos_version()
  90 {
  91         int major, minor;
  92         union REGS regs;
  93
  94         memset(&regs,0,sizeof(regs));
  95         regs.x.eax = 0x3000;                                                    // Get MS-DOS Version Number
  96         int386( 0x21, &regs, &regs );
  97
  98         major = regs.h.al;
  99         minor = regs.h.ah;
 100
 101         if ( major < 5 )        {
 102                 printf( "Using MS-DOS version %d.%d\nThis is not compatable with Descent.", major, minor);
 103                 exit(1);
 104         }
 105         //printf( "\nUsing MS-DOS %d.%d...\n", major, minor );
 106 }
 107
 108 void dos_check_file_handles(int num_required)
 109 {
 110         int i, n;
 111         FILE * fp[16];
 112
 113         if ( num_required > 16 )
 114                 num_required = 16;
 115
 116         n = 0;
 117         for (i=0; i<16; i++ )
 118                 fp[i] = NULL;
 119         for (i=0; i<16; i++ )   {
 120                 fp[i] = fopen( "nul", "wb" );
 121                 if ( !fp[i] ) break;
 122         }
 123         n = i;
 124         for (i=0; i<16; i++ )   {
 125                 if (fp[i])
 126                         fclose(fp[i]);
 127         }
 128         if ( n < num_required ) {
 129                 printf( "\n%s\n", TXT_NOT_ENOUGH_HANDLES );
 130                 printf( "------------------------\n" );
 131                 printf( "%d/%d %s\n", n, num_required, TXT_HANDLES_1 );
 132                 printf( "%s\n", TXT_HANDLES_2);
 133                 printf( "%s\n", TXT_HANDLES_3);
 134                 exit(1);
 135         }
 136 }
 137
 138 #define NEEDED_DOS_MEMORY                       ( 300*1024)             // 300 K
 139 #define NEEDED_LINEAR_MEMORY                    (7680*1024)             // 7.5 MB
 140 #define LOW_PHYSICAL_MEMORY_CUTOFF      (5*1024*1024)   // 5.0 MB
 141 #define NEEDED_PHYSICAL_MEMORY          (2000*1024)             // 2000 KB
 142
 143 extern int piggy_low_memory;
 144
 145 void mem_int_to_string( int number, char *dest )
 146 {
 147         int i,l,c;
 148         char buffer[20],*p;
 149
 150         sprintf( buffer, "%d", number );
 151
 152         l = strlen(buffer);
 153         if (l<=3) {
 154                 // Don't bother with less than 3 digits
 155                 sprintf( dest, "%d", number );
 156                 return;
 157         }
 158
 159         c = l % 3;
 160         p=dest;
 161         for (i=0; i<l; i++ ) {
 162                 if (c==0) {
 163                         if (i) *p++=',';
 164             c = 3;
 165         }
 166         c--;
 167         *p++ = buffer[i];
 168     }
 169         *p++ = '\0';
 170 }
 171
 172 void check_memory()
 173 {
 174         char text[32];
 175
 176         printf( "\n%s\n", TXT_AVAILABLE_MEMORY);
 177         printf( "----------------\n" );
 178         mem_int_to_string( dpmi_dos_memory/1024, text );
 179         printf( "Conventional: %7s KB\n", text );
 180         mem_int_to_string( dpmi_physical_memory/1024, text );
 181         printf( "Extended:     %7s KB\n", text );
 182         if ( dpmi_available_memory > dpmi_physical_memory )     {
 183                 mem_int_to_string( (dpmi_available_memory-dpmi_physical_memory)/1024, text );
 184         } else {
 185                 mem_int_to_string( 0, text );
 186         }
 187         printf( "Virtual:      %7s KB\n", text );
 188         printf( "\n" );
 189
 190         if ( dpmi_dos_memory < NEEDED_DOS_MEMORY )      {
 191                 printf( "%d %s\n", NEEDED_DOS_MEMORY - dpmi_dos_memory, TXT_MEMORY_CONFIG );
 192                 exit(1);
 193         }
 194
 195         if ( dpmi_available_memory < NEEDED_LINEAR_MEMORY )     {
 196                 if ( dpmi_virtual_memory )      {
 197                         printf( "%d %s\n", NEEDED_LINEAR_MEMORY - dpmi_available_memory, TXT_RECONFIGURE_VMM );
 198                 } else {
 199                         printf( "%d %s\n", NEEDED_LINEAR_MEMORY - dpmi_available_memory, TXT_MORE_MEMORY );
 200                         printf( "%s\n", TXT_MORE_MEMORY_2);
 201                 }
 202                 exit(1);
 203         }
 204
 205         if ( dpmi_physical_memory < NEEDED_PHYSICAL_MEMORY )    {
 206                 printf( "%d %s\n", NEEDED_PHYSICAL_MEMORY - dpmi_physical_memory, TXT_PHYSICAL_MEMORY );
 207                 if ( dpmi_virtual_memory )      {
 208                         printf( "%s\n", TXT_PHYSICAL_MEMORY_2);
 209                 }
 210                 exit(1);
 211         }
 212
 213         if ( dpmi_physical_memory < LOW_PHYSICAL_MEMORY_CUTOFF )        {
 214                 piggy_low_memory = 1;
 215         }
 216 }
 217
 218 //NO_STACK_SIZE_CHECK uint * stack, *stack_ptr;
 219 //NO_STACK_SIZE_CHECK int stack_size, unused_stack_space;
 220 //NO_STACK_SIZE_CHECK int sil;
 221 //NO_STACK_SIZE_CHECK
 222 //NO_STACK_SIZE_CHECK int main(int argc,char **argv)
 223 //NO_STACK_SIZE_CHECK {
 224 //NO_STACK_SIZE_CHECK   uint ret_value;
 225 //NO_STACK_SIZE_CHECK
 226 //NO_STACK_SIZE_CHECK   unused_stack_space = 0;
 227 //NO_STACK_SIZE_CHECK   stack = &ret_value;
 228 //NO_STACK_SIZE_CHECK   stack_size = stackavail()/4;
 229 //NO_STACK_SIZE_CHECK
 230 //NO_STACK_SIZE_CHECK   for ( sil=0; sil<stack_size; sil++ )    {
 231 //NO_STACK_SIZE_CHECK           stack--;
 232 //NO_STACK_SIZE_CHECK           *stack = 0xface0123;
 233 //NO_STACK_SIZE_CHECK   }
 234 //NO_STACK_SIZE_CHECK
 235 //NO_STACK_SIZE_CHECK   ret_value = descent_main( argc, argv );         // Rename main to be descent_main
 236 //NO_STACK_SIZE_CHECK
 237 //NO_STACK_SIZE_CHECK   for ( sil=0; sil<stack_size; sil++ )    {
 238 //NO_STACK_SIZE_CHECK           if ( *stack == 0xface0123 )
 239 //NO_STACK_SIZE_CHECK                   unused_stack_space++;
 240 //NO_STACK_SIZE_CHECK           stack++;
 241 //NO_STACK_SIZE_CHECK   }
 242 //NO_STACK_SIZE_CHECK
 243 //NO_STACK_SIZE_CHECK   mprintf(( 0, "Program used %d/%d stack space\n", (stack_size - unused_stack_space)*4, stack_size*4 ));
 244 //NO_STACK_SIZE_CHECK   key_getch();
 245 //NO_STACK_SIZE_CHECK
 246 //NO_STACK_SIZE_CHECK   return ret_value;
 247 //NO_STACK_SIZE_CHECK }
 248
 249 extern int digi_timer_rate;
 250
 251 #ifdef __WATCOMC__
 252 #pragma off (check_stack)
 253 int __far descent_critical_error_handler(unsigned deverror, unsigned errcode, unsigned __far * devhdr )
 254 {
 255         devhdr = devhdr;
 256         descent_critical_error++;
 257         descent_critical_deverror = deverror;
 258         descent_critical_errcode = errcode;
 259         return _HARDERR_FAIL;
 260 }
 261 void chandler_end (void)  // dummy functions
 262 {
 263 }
 264 #pragma on (check_stack)
 265 #endif
 266
 267 void arch_init_start() {
 268         // Initialize DPMI before anything else!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 269         // (To check memory size and availbabitliy and allocate some low DOS memory)
 270         // adb: no TXT_... loaded yet
 271         //if (Inferno_verbose) printf( "%s... ", TXT_INITIALIZING_DPMI);
 272         con_printf(CON_VERBOSE, "Initializing DPMI services... ");
 273         dpmi_init(1);             // Before anything
 274         con_printf(CON_VERBOSE, "\n" );
 275
 276 #ifndef __GNUC__
 277         con_printf(CON_VERBOSE, "\n%s...", TXT_INITIALIZING_CRIT);
 278         if (!dpmi_lock_region((void near *)descent_critical_error_handler,(char *)chandler_end - (char near *)descent_critical_error_handler))  {
 279                 Error( "Unable to lock critial error handler" );
 280         }
 281         if (!dpmi_lock_region(&descent_critical_error,sizeof(int)))     {
 282                 Error( "Unable to lock critial error handler" );
 283         }
 284         if (!dpmi_lock_region(&descent_critical_deverror,sizeof(unsigned)))     {
 285                 Error( "Unable to lock critial error handler" );
 286         }
 287         if (!dpmi_lock_region(&descent_critical_errcode,sizeof(unsigned)))      {
 288                 Error( "Unable to lock critial error handler" );
 289         }
 290         _harderr((void *) descent_critical_error_handler );
 291         //Above line modified by KRB, added (void *) cast
 292         //for the compiler.
 293 #endif
 294 }
 295
 296 void arch_init() {
 297         if ( !args_find( "-nodoscheck" ))
 298                 check_dos_version();
 299
 300         if ( !args_find( "-nofilecheck" ))
 301                 dos_check_file_handles(5);
 302
 303         if ( !args_find( "-nomemcheck" ))
 304                 check_memory();
 305
 306         #ifndef NDEBUG
 307                 minit();
 308                 mopen( 0, 9, 1, 78, 15, "Debug Spew");
 309                 mopen( 1, 2, 1, 78,  5, "Errors & Serious Warnings");
 310         #endif
 311
 312 /*        if (!WVIDEO_running)
 313                 mprintf((0,"WVIDEO_running = %d\n",WVIDEO_running));*/
 314
 315         //if (!WVIDEO_running) install_int3_handler();
 316
 317
 318         con_printf(CON_VERBOSE, "\n%s", TXT_VERBOSE_2);
 319         timer_init();
 320         timer_set_rate( digi_timer_rate );                      // Tell our timer how fast to go (120 Hz)
 321         joy_set_timer_rate( digi_timer_rate );      // Tell joystick how fast timer is going
 322
 323         con_printf(CON_VERBOSE, "\n%s", TXT_VERBOSE_3);
 324         key_init();
 325         if (!args_find( "-nomouse" ))     {
 326                 con_printf(CON_VERBOSE, "\n%s", TXT_VERBOSE_4);
 327                 if (args_find( "-nocyberman" ))
 328                         mouse_init(0);
 329                 else
 330                         mouse_init(1);
 331         } else {
 332                 con_printf(CON_VERBOSE, "\n%s", TXT_VERBOSE_5);
 333         }
 334         if (!args_find( "-nojoystick" ))  {
 335                 con_printf(CON_VERBOSE, "\n%s", TXT_VERBOSE_6);
 336                 joy_init();
 337                 if ( args_find( "-joyslow" ))     {
 338                         con_printf(CON_VERBOSE, "\n%s", TXT_VERBOSE_7);
 339                         joy_set_slow_reading(JOY_SLOW_READINGS);
 340                 }
 341                 if ( args_find( "-joypolled" ))   {
 342                         con_printf(CON_VERBOSE, "\n%s", TXT_VERBOSE_8);
 343                         joy_set_slow_reading(JOY_POLLED_READINGS);
 344                 }
 345                 if ( args_find( "-joybios" ))     {
 346                         con_printf(CON_VERBOSE, "\n%s", TXT_VERBOSE_9);
 347                         joy_set_slow_reading(JOY_BIOS_READINGS);
 348                 }
 349                 if ( args_find( "-joynice" ))     {
 350                         con_printf(CON_VERBOSE, "\n%s", "Using nice joystick poller..." );
 351                         joy_set_slow_reading(JOY_FRIENDLY_READINGS);
 352                 }
 353                 if ( args_find( "-gameport" ))    {
 354                         if ( init_gameport() )  {
 355                                 joy_set_slow_reading(JOY_BIOS_READINGS);
 356                         } else {
 357                                 Error( "\nCouldn't initialize the Notebook Gameport.\nMake sure the NG driver is loaded.\n" );
 358                         }
 359                 }
 360         } else {
 361                 con_printf(CON_VERBOSE, "\n%s", TXT_VERBOSE_10);
 362         }
 363         #if 0 // no divzero
 364         if (Inferno_verbose) printf( "\n%s", TXT_VERBOSE_11);
 365         div0_init(DM_ERROR);
 366         #endif
 367 }
 368
 369 #endif // __ENV_DJGPP__