arch/dos/init.c

   1 /*
   2  *
   3  * Dos initialization
   4  *
   5  */
   6
   7 #ifdef HAVE_CONFIG_H
   8 #include <conf.h>
   9 #endif
  10
  11 #include <stdio.h>
  12 #include <string.h>
  13 #ifdef __DJGPP__
  14 #define _BORLAND_DOS_REGS 1
  15 #endif
  16 #include <dos.h>
  17
  18 #include "pstypes.h"
  19 #include "inferno.h"
  20 #include "text.h"
  21 #include "console.h"
  22 #include "args.h"
  23 #include "dxxerror.h"
  24
  25 #include "joy.h"
  26 #include "timer.h"
  27 #include "key.h"
  28 #include "mono.h"
  29 #include "u_dpmi.h"
  30 #include "mouse.h"
  31
  32 //added on 9/15/98 by Victor Rachels to add cd controls
  33 //#include "bcd.h"
  34 //end this section addition - Victor Rachels
  35
  36
  37 void install_int3_handler(void);
  38
  39 #ifdef __WATCOMC__
  40 int __far descent_critical_error_handler( unsigned deverr, unsigned errcode, unsigned far * devhdr );
  41 #endif
  42
  43 #ifndef NDEBUG
  44 #ifdef __WATCOMC__
  45 void do_heap_check()
  46 {
  47         int heap_status;
  48
  49         heap_status = _heapset( 0xFF );
  50         switch( heap_status )
  51         {
  52         case _HEAPBADBEGIN:
  53                 mprintf((1, "ERROR - heap is damaged\n"));
  54                 Int3();
  55                 break;
  56         case _HEAPBADNODE:
  57                 mprintf((1, "ERROR - bad node in heap\n" ));
  58                 Int3();
  59                 break;
  60         }
  61 }
  62 #endif
  63 #endif
  64
  65
  66
  67 #ifdef VR_DEVICES
  68 int is_3dbios_installed()
  69 {
  70         dpmi_real_regs rregs;
  71         memset(&rregs,0,sizeof(dpmi_real_regs));
  72         rregs.eax = 0x4ed0;
  73         //rregs.ebx = 0x3d10;
  74         dpmi_real_int386x( 0x10, &rregs );
  75         if ( (rregs.edx & 0xFFFF) != 0x3344 )
  76                 return 0;
  77         else
  78                 return 1;
  79 }
  80 #endif
  81
  82 // Returns 1 if ok, 0 if failed...
  83 int init_gameport()
  84 {
  85         union REGS regs;
  86
  87         memset(&regs,0,sizeof(regs));
  88         regs.x.eax = 0x8400;
  89         regs.x.edx = 0xF0;
  90         int386( 0x15, &regs, &regs );
  91         if ( ( regs.x.eax & 0xFFFF ) == 0x4753 /*'SG'*/ )
  92                 return 1;
  93         else
  94                 return 0;
  95 }
  96
  97 void check_dos_version()
  98 {
  99         int major, minor;
 100         union REGS regs;
 101
 102         memset(&regs,0,sizeof(regs));
 103         regs.x.eax = 0x3000;                                                    // Get MS-DOS Version Number
 104         int386( 0x21, &regs, &regs );
 105
 106         major = regs.h.al;
 107         minor = regs.h.ah;
 108
 109         if ( major < 5 )        {
 110                 printf( "Using MS-DOS version %d.%d\nThis is not compatable with Descent.", major, minor);
 111                 exit(1);
 112         }
 113         //printf( "\nUsing MS-DOS %d.%d...\n", major, minor );
 114 }
 115
 116 void dos_check_file_handles(int num_required)
 117 {
 118         int i, n;
 119         FILE * fp[16];
 120
 121         if ( num_required > 16 )
 122                 num_required = 16;
 123
 124         n = 0;
 125         for (i=0; i<16; i++ )
 126                 fp[i] = NULL;
 127         for (i=0; i<16; i++ )   {
 128                 fp[i] = fopen( "nul", "wb" );
 129                 if ( !fp[i] ) break;
 130         }
 131         n = i;
 132         for (i=0; i<16; i++ )   {
 133                 if (fp[i])
 134                         fclose(fp[i]);
 135         }
 136         if ( n < num_required ) {
 137                 printf( "\n%s\n", TXT_NOT_ENOUGH_HANDLES );
 138                 printf( "------------------------\n" );
 139                 printf( "%d/%d %s\n", n, num_required, TXT_HANDLES_1 );
 140                 printf( "%s\n", TXT_HANDLES_2);
 141                 printf( "%s\n", TXT_HANDLES_3);
 142                 exit(1);
 143         }
 144 }
 145
 146 #define NEEDED_DOS_MEMORY                       ( 300*1024)             // 300 K
 147 #define NEEDED_LINEAR_MEMORY                    (7680*1024)             // 7.5 MB
 148 #define LOW_PHYSICAL_MEMORY_CUTOFF      (5*1024*1024)   // 5.0 MB
 149 #define NEEDED_PHYSICAL_MEMORY          (2000*1024)             // 2000 KB
 150
 151 extern int piggy_low_memory;
 152
 153 void mem_int_to_string( int number, char *dest )
 154 {
 155         int i,l,c;
 156         char buffer[20],*p;
 157
 158         sprintf( buffer, "%d", number );
 159
 160         l = strlen(buffer);
 161         if (l<=3) {
 162                 // Don't bother with less than 3 digits
 163                 sprintf( dest, "%d", number );
 164                 return;
 165         }
 166
 167         c = l % 3;
 168         p=dest;
 169         for (i=0; i<l; i++ ) {
 170                 if (c==0) {
 171                         if (i) *p++=',';
 172             c = 3;
 173         }
 174         c--;
 175         *p++ = buffer[i];
 176     }
 177         *p++ = '\0';
 178 }
 179
 180 void check_memory()
 181 {
 182         char text[32];
 183
 184         printf( "\n%s\n", TXT_AVAILABLE_MEMORY);
 185         printf( "----------------\n" );
 186         mem_int_to_string( dpmi_dos_memory/1024, text );
 187         printf( "Conventional: %7s KB\n", text );
 188         mem_int_to_string( dpmi_physical_memory/1024, text );
 189         printf( "Extended:     %7s KB\n", text );
 190         if ( dpmi_available_memory > dpmi_physical_memory )     {
 191                 mem_int_to_string( (dpmi_available_memory-dpmi_physical_memory)/1024, text );
 192         } else {
 193                 mem_int_to_string( 0, text );
 194         }
 195         printf( "Virtual:      %7s KB\n", text );
 196         printf( "\n" );
 197
 198         if ( dpmi_dos_memory < NEEDED_DOS_MEMORY )      {
 199                 printf( "%d %s\n", NEEDED_DOS_MEMORY - dpmi_dos_memory, TXT_MEMORY_CONFIG );
 200                 exit(1);
 201         }
 202
 203         if ( dpmi_available_memory < NEEDED_LINEAR_MEMORY )     {
 204                 if ( dpmi_virtual_memory )      {
 205                         printf( "%d %s\n", NEEDED_LINEAR_MEMORY - dpmi_available_memory, TXT_RECONFIGURE_VMM );
 206                 } else {
 207                         printf( "%d %s\n", NEEDED_LINEAR_MEMORY - dpmi_available_memory, TXT_MORE_MEMORY );
 208                         printf( "%s\n", TXT_MORE_MEMORY_2);
 209                 }
 210                 exit(1);
 211         }
 212
 213         if ( dpmi_physical_memory < NEEDED_PHYSICAL_MEMORY )    {
 214                 printf( "%d %s\n", NEEDED_PHYSICAL_MEMORY - dpmi_physical_memory, TXT_PHYSICAL_MEMORY );
 215                 if ( dpmi_virtual_memory )      {
 216                         printf( "%s\n", TXT_PHYSICAL_MEMORY_2);
 217                 }
 218                 exit(1);
 219         }
 220
 221         if ( dpmi_physical_memory < LOW_PHYSICAL_MEMORY_CUTOFF )        {
 222                 piggy_low_memory = 1;
 223         }
 224 }
 225
 226 //NO_STACK_SIZE_CHECK uint * stack, *stack_ptr;
 227 //NO_STACK_SIZE_CHECK int stack_size, unused_stack_space;
 228 //NO_STACK_SIZE_CHECK int sil;
 229 //NO_STACK_SIZE_CHECK
 230 //NO_STACK_SIZE_CHECK int main(int argc,char **argv)
 231 //NO_STACK_SIZE_CHECK {
 232 //NO_STACK_SIZE_CHECK   uint ret_value;
 233 //NO_STACK_SIZE_CHECK
 234 //NO_STACK_SIZE_CHECK   unused_stack_space = 0;
 235 //NO_STACK_SIZE_CHECK   stack = &ret_value;
 236 //NO_STACK_SIZE_CHECK   stack_size = stackavail()/4;
 237 //NO_STACK_SIZE_CHECK
 238 //NO_STACK_SIZE_CHECK   for ( sil=0; sil<stack_size; sil++ )    {
 239 //NO_STACK_SIZE_CHECK           stack--;
 240 //NO_STACK_SIZE_CHECK           *stack = 0xface0123;
 241 //NO_STACK_SIZE_CHECK   }
 242 //NO_STACK_SIZE_CHECK
 243 //NO_STACK_SIZE_CHECK   ret_value = descent_main( argc, argv );         // Rename main to be descent_main
 244 //NO_STACK_SIZE_CHECK
 245 //NO_STACK_SIZE_CHECK   for ( sil=0; sil<stack_size; sil++ )    {
 246 //NO_STACK_SIZE_CHECK           if ( *stack == 0xface0123 )
 247 //NO_STACK_SIZE_CHECK                   unused_stack_space++;
 248 //NO_STACK_SIZE_CHECK           stack++;
 249 //NO_STACK_SIZE_CHECK   }
 250 //NO_STACK_SIZE_CHECK
 251 //NO_STACK_SIZE_CHECK   mprintf(( 0, "Program used %d/%d stack space\n", (stack_size - unused_stack_space)*4, stack_size*4 ));
 252 //NO_STACK_SIZE_CHECK   key_getch();
 253 //NO_STACK_SIZE_CHECK
 254 //NO_STACK_SIZE_CHECK   return ret_value;
 255 //NO_STACK_SIZE_CHECK }
 256
 257 extern int digi_timer_rate;
 258
 259 #ifdef __WATCOMC__
 260 #pragma off (check_stack)
 261 int __far descent_critical_error_handler(unsigned deverror, unsigned errcode, unsigned __far * devhdr )
 262 {
 263         devhdr = devhdr;
 264         descent_critical_error++;
 265         descent_critical_deverror = deverror;
 266         descent_critical_errcode = errcode;
 267         return _HARDERR_FAIL;
 268 }
 269 void chandler_end (void)  // dummy functions
 270 {
 271 }
 272 #pragma on (check_stack)
 273 #endif
 274
 275 void arch_init_start() {
 276         // Initialize DPMI before anything else!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 277         // (To check memory size and availbabitliy and allocate some low DOS memory)
 278         // adb: no TXT_... loaded yet
 279         //if (Inferno_verbose) printf( "%s... ", TXT_INITIALIZING_DPMI);
 280         con_printf(CON_VERBOSE, "Initializing DPMI services... ");
 281         dpmi_init(1);             // Before anything
 282         con_printf(CON_VERBOSE, "\n" );
 283
 284 #ifndef __GNUC__
 285         con_printf(CON_VERBOSE, "\n%s...", TXT_INITIALIZING_CRIT);
 286         if (!dpmi_lock_region((void near *)descent_critical_error_handler,(char *)chandler_end - (char near *)descent_critical_error_handler))  {
 287                 Error( "Unable to lock critial error handler" );
 288         }
 289         if (!dpmi_lock_region(&descent_critical_error,sizeof(int)))     {
 290                 Error( "Unable to lock critial error handler" );
 291         }
 292         if (!dpmi_lock_region(&descent_critical_deverror,sizeof(unsigned)))     {
 293                 Error( "Unable to lock critial error handler" );
 294         }
 295         if (!dpmi_lock_region(&descent_critical_errcode,sizeof(unsigned)))      {
 296                 Error( "Unable to lock critial error handler" );
 297         }
 298         _harderr((void *) descent_critical_error_handler );
 299         //Above line modified by KRB, added (void *) cast
 300         //for the compiler.
 301 #endif
 302 }
 303
 304 void arch_init() {
 305         if ( !FindArg( "-nodoscheck" ))
 306                 check_dos_version();
 307
 308         if ( !FindArg( "-nofilecheck" ))
 309                 dos_check_file_handles(5);
 310
 311         if ( !FindArg( "-nomemcheck" ))
 312                 check_memory();
 313
 314         #ifndef NDEBUG
 315                 minit();
 316                 mopen( 0, 9, 1, 78, 15, "Debug Spew");
 317                 mopen( 1, 2, 1, 78,  5, "Errors & Serious Warnings");
 318         #endif
 319
 320 /*        if (!WVIDEO_running)
 321                 mprintf((0,"WVIDEO_running = %d\n",WVIDEO_running));*/
 322
 323         //if (!WVIDEO_running) install_int3_handler();
 324
 325
 326         con_printf(CON_VERBOSE, "\n%s", TXT_VERBOSE_2);
 327         timer_init();
 328         timer_set_rate( digi_timer_rate );                      // Tell our timer how fast to go (120 Hz)
 329         joy_set_timer_rate( digi_timer_rate );      // Tell joystick how fast timer is going
 330
 331         con_printf(CON_VERBOSE, "\n%s", TXT_VERBOSE_3);
 332         key_init();
 333         if (!FindArg( "-nomouse" ))     {
 334                 con_printf(CON_VERBOSE, "\n%s", TXT_VERBOSE_4);
 335                                 if(!mouse_init(1))
 336                                         con_printf(CON_NORMAL, "\nError initializing mouse.\n");
 337         } else {
 338                 con_printf(CON_VERBOSE, "\n%s", TXT_VERBOSE_5);
 339         }
 340         if (!FindArg( "-nojoystick" ))  {
 341                 con_printf(CON_VERBOSE, "\n%s", TXT_VERBOSE_6);
 342                 joy_init();
 343                 if ( FindArg( "-joyslow" ))     {
 344                         con_printf(CON_VERBOSE, "\n%s", TXT_VERBOSE_7);
 345                         joy_set_slow_reading(JOY_SLOW_READINGS);
 346                 }
 347                 if ( FindArg( "-joypolled" ))   {
 348                         con_printf(CON_VERBOSE, "\n%s", TXT_VERBOSE_8);
 349                         joy_set_slow_reading(JOY_POLLED_READINGS);
 350                 }
 351                 if ( FindArg( "-joybios" ))     {
 352                         con_printf(CON_VERBOSE, "\n%s", TXT_VERBOSE_9);
 353                         joy_set_slow_reading(JOY_BIOS_READINGS);
 354                 }
 355                 if ( FindArg( "-joynice" ))     {
 356                         con_printf(CON_VERBOSE, "\n%s", "Using nice joystick poller..." );
 357                         joy_set_slow_reading(JOY_FRIENDLY_READINGS);
 358                 }
 359                 if ( FindArg( "-gameport" ))    {
 360                         if ( init_gameport() )  {
 361                                 joy_set_slow_reading(JOY_BIOS_READINGS);
 362                         } else {
 363                                 Error( "\nCouldn't initialize the Notebook Gameport.\nMake sure the NG driver is loaded.\n" );
 364                         }
 365                 }
 366         } else {
 367                 con_printf(CON_VERBOSE, "\n%s", TXT_VERBOSE_10);
 368         }
 369         #if 0 // no divzero
 370         if (Inferno_verbose) printf( "\n%s", TXT_VERBOSE_11);
 371         div0_init(DM_ERROR);
 372         #endif
 373 }