msdos/int21.c

   1 /*
   2  * DOS interrupt 21h handler
   3  */
   4
   5 #include "config.h"
   6
   7 #include <time.h>
   8 #include <fcntl.h>
   9 #include <errno.h>
  10 #include <stdlib.h>
  11 #ifdef HAVE_SYS_FILE_H
  12 # include <sys/file.h>
  13 #endif
  14 #include <string.h>
  15 #include <sys/stat.h>
  16 #include <sys/time.h>
  17 #include <sys/types.h>
  18 #include <unistd.h>
  19 #include <utime.h>
  20 #include <ctype.h>
  21 #include "windef.h"
  22 #include "winbase.h"
  23 #include "windef.h"
  24 #include "wingdi.h"
  25 #include "winuser.h" /* SW_NORMAL */
  26 #include "wine/winbase16.h"
  27 #include "winerror.h"
  28 #include "drive.h"
  29 #include "file.h"
  30 #include "heap.h"
  31 #include "msdos.h"
  32 #include "ldt.h"
  33 #include "task.h"
  34 #include "options.h"
  35 #include "miscemu.h"
  36 #include "dosexe.h" /* for the MZ_SUPPORTED define */
  37 #include "module.h"
  38 #include "debugtools.h"
  39 #include "console.h"
  40
  41 DEFAULT_DEBUG_CHANNEL(int21)
  42 #if defined(__svr4__) || defined(_SCO_DS)
  43 /* SVR4 DOESNT do locking the same way must implement properly */
  44 #define LOCK_EX 0
  45 #define LOCK_SH  1
  46 #define LOCK_NB  8
  47 #endif
  48
  49
  50 #define DOS_GET_DRIVE(reg) ((reg) ? (reg) - 1 : DRIVE_GetCurrentDrive())
  51
  52 /* Define the drive parameter block, as used by int21/1F
  53  * and int21/32.  This table can be accessed through the
  54  * global 'dpb' pointer, which points into the local dos
  55  * heap.
  56  */
  57 struct DPB
  58 {
  59     BYTE drive_num;         /* 0=A, etc. */
  60     BYTE unit_num;          /* Drive's unit number (?) */
  61     WORD sector_size;       /* Sector size in bytes */
  62     BYTE high_sector;       /* Highest sector in a cluster */
  63     BYTE shift;             /* Shift count (?) */
  64     WORD reserved;          /* Number of reserved sectors at start */
  65     BYTE num_FAT;           /* Number of FATs */
  66     WORD dir_entries;       /* Number of root dir entries */
  67     WORD first_data;        /* First data sector */
  68     WORD high_cluster;      /* Highest cluster number */
  69     WORD sectors_in_FAT;    /* Number of sectors per FAT */
  70     WORD start_dir;         /* Starting sector of first dir */
  71     DWORD driver_head;      /* Address of device driver header (?) */
  72     BYTE media_ID;          /* Media ID */
  73     BYTE access_flag;       /* Prev. accessed flag (0=yes,0xFF=no) */
  74     DWORD next;             /* Pointer to next DPB in list */
  75     WORD free_search;       /* Free cluster search start */
  76     WORD free_clusters;     /* Number of free clusters (0xFFFF=unknown) */
  77 };
  78
  79 WORD CodePage = 437;
  80 DWORD dpbsegptr;
  81
  82 struct DosHeap {
  83         BYTE InDosFlag;
  84         BYTE mediaID;
  85         BYTE biosdate[8];
  86         struct DPB dpb;
  87         BYTE DummyDBCSLeadTable[6];
  88 };
  89 static struct DosHeap *heap;
  90 static WORD DosHeapHandle;
  91
  92 extern char TempDirectory[];
  93
  94 static BOOL INT21_CreateHeap(void)
  95 {
  96     if (!(DosHeapHandle = GlobalAlloc16(GMEM_FIXED,sizeof(struct DosHeap))))
  97     {
  98         WARN("Out of memory\n");
  99         return FALSE;
 100     }
 101     heap = (struct DosHeap *) GlobalLock16(DosHeapHandle);
 102     dpbsegptr = PTR_SEG_OFF_TO_SEGPTR(DosHeapHandle,(int)&heap->dpb-(int)heap);
 103     heap->InDosFlag = 0;
 104     strcpy(heap->biosdate, "01/01/80");
 105     memset(heap->DummyDBCSLeadTable, 0, 6);
 106     return TRUE;
 107 }
 108
 109 static BYTE *GetCurrentDTA( CONTEXT86 *context )
 110 {
 111     TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
 112
 113     /* FIXME: This assumes DTA was set correctly! */
 114     return (BYTE *)CTX_SEG_OFF_TO_LIN( context, SELECTOROF(pTask->dta),
 115                                                 (DWORD)OFFSETOF(pTask->dta) );
 116 }
 117
 118
 119 void CreateBPB(int drive, BYTE *data, BOOL16 limited)
 120 /* limited == TRUE is used with INT 0x21/0x440d */
 121 {
 122         if (drive > 1) {
 123                 setword(data, 512);
 124                 data[2] = 2;
 125                 setword(&data[3], 0);
 126                 data[5] = 2;
 127                 setword(&data[6], 240);
 128                 setword(&data[8], 64000);
 129                 data[0x0a] = 0xf8;
 130                 setword(&data[0x0b], 40);
 131                 setword(&data[0x0d], 56);
 132                 setword(&data[0x0f], 2);
 133                 setword(&data[0x11], 0);
 134                 if (!limited) {
 135                     setword(&data[0x1f], 800);
 136                     data[0x21] = 5;
 137                     setword(&data[0x22], 1);
 138                 }
 139         } else { /* 1.44mb */
 140                 setword(data, 512);
 141                 data[2] = 2;
 142                 setword(&data[3], 0);
 143                 data[5] = 2;
 144                 setword(&data[6], 240);
 145                 setword(&data[8], 2880);
 146                 data[0x0a] = 0xf8;
 147                 setword(&data[0x0b], 6);
 148                 setword(&data[0x0d], 18);
 149                 setword(&data[0x0f], 2);
 150                 setword(&data[0x11], 0);
 151                 if (!limited) {
 152                     setword(&data[0x1f], 80);
 153                     data[0x21] = 7;
 154                     setword(&data[0x22], 2);
 155                 }
 156         }
 157 }
 158
 159 static int INT21_GetFreeDiskSpace( CONTEXT86 *context )
 160 {
 161     DWORD cluster_sectors, sector_bytes, free_clusters, total_clusters;
 162     char root[] = "A:\\";
 163
 164     *root += DOS_GET_DRIVE( DL_reg(context) );
 165     if (!GetDiskFreeSpaceA( root, &cluster_sectors, &sector_bytes,
 166                               &free_clusters, &total_clusters )) return 0;
 167     AX_reg(context) = cluster_sectors;
 168     BX_reg(context) = free_clusters;
 169     CX_reg(context) = sector_bytes;
 170     DX_reg(context) = total_clusters;
 171     return 1;
 172 }
 173
 174 static int INT21_GetDriveAllocInfo( CONTEXT86 *context )
 175 {
 176     if (!INT21_GetFreeDiskSpace( context )) return 0;
 177     if (!heap && !INT21_CreateHeap()) return 0;
 178     heap->mediaID = 0xf0;
 179     DS_reg(context) = DosHeapHandle;
 180     BX_reg(context) = (int)&heap->mediaID - (int)heap;
 181     return 1;
 182 }
 183
 184 static void GetDrivePB( CONTEXT86 *context, int drive )
 185 {
 186         if(!DRIVE_IsValid(drive))
 187         {
 188             SetLastError( ERROR_INVALID_DRIVE );
 189             AX_reg(context) = 0x00ff;
 190         }
 191         else if (heap || INT21_CreateHeap())
 192         {
 193                 FIXME("GetDrivePB not fully implemented.\n");
 194
 195                 /* FIXME: I have no idea what a lot of this information should
 196                  * say or whether it even really matters since we're not allowing
 197                  * direct block access.  However, some programs seem to depend on
 198                  * getting at least _something_ back from here.  The 'next' pointer
 199                  * does worry me, though.  Should we have a complete table of
 200                  * separate DPBs per drive?  Probably, but I'm lazy. :-)  -CH
 201                  */
 202                 heap->dpb.drive_num = heap->dpb.unit_num = drive; /*The same?*/
 203                 heap->dpb.sector_size = 512;
 204                 heap->dpb.high_sector = 1;
 205                 heap->dpb.shift = drive < 2 ? 0 : 6; /*6 for HD, 0 for floppy*/
 206                 heap->dpb.reserved = 0;
 207                 heap->dpb.num_FAT = 1;
 208                 heap->dpb.dir_entries = 2;
 209                 heap->dpb.first_data = 2;
 210                 heap->dpb.high_cluster = 64000;
 211                 heap->dpb.sectors_in_FAT = 1;
 212                 heap->dpb.start_dir = 1;
 213                 heap->dpb.driver_head = 0;
 214                 heap->dpb.media_ID = (drive > 1) ? 0xF8 : 0xF0;
 215                 heap->dpb.access_flag = 0;
 216                 heap->dpb.next = 0;
 217                 heap->dpb.free_search = 0;
 218                 heap->dpb.free_clusters = 0xFFFF;    /* unknown */
 219
 220                 AL_reg(context) = 0x00;
 221                 DS_reg(context) = SELECTOROF(dpbsegptr);
 222                 BX_reg(context) = OFFSETOF(dpbsegptr);
 223         }
 224 }
 225
 226
 227 static void ioctlGetDeviceInfo( CONTEXT86 *context )
 228 {
 229     int curr_drive;
 230     const DOS_DEVICE *dev;
 231
 232     TRACE("(%d)\n", BX_reg(context));
 233
 234     RESET_CFLAG(context);
 235
 236     /* DOS device ? */
 237     if ((dev = DOSFS_GetDeviceByHandle( FILE_GetHandle(BX_reg(context)) )))
 238     {
 239         DX_reg(context) = dev->flags;
 240         return;
 241     }
 242
 243     /* it seems to be a file */
 244     curr_drive = DRIVE_GetCurrentDrive();
 245     DX_reg(context) = 0x0140 + curr_drive + ((curr_drive > 1) ? 0x0800 : 0);
 246     /* no floppy */
 247     /* bits 0-5 are current drive
 248      * bit 6 - file has NOT been written..FIXME: correct?
 249      * bit 8 - generate int24 if no diskspace on write/ read past end of file
 250      * bit 11 - media not removable
 251      * bit 14 - don't set file date/time on closing
 252      * bit 15 - file is remote
 253      */
 254 }
 255
 256 static BOOL ioctlGenericBlkDevReq( CONTEXT86 *context )
 257 {
 258         BYTE *dataptr = CTX_SEG_OFF_TO_LIN(context, DS_reg(context), EDX_reg(context));
 259         int drive = DOS_GET_DRIVE( BL_reg(context) );
 260
 261         if (!DRIVE_IsValid(drive))
 262         {
 263             SetLastError( ERROR_FILE_NOT_FOUND );
 264             return TRUE;
 265         }
 266
 267         if (CH_reg(context) != 0x08)
 268         {
 269             INT_BARF( context, 0x21 );
 270             return FALSE;
 271         }
 272
 273         switch (CL_reg(context))
 274         {
 275                 case 0x4a: /* lock logical volume */
 276                         TRACE("lock logical volume (%d) level %d mode %d\n",drive,BH_reg(context),DX_reg(context));
 277                         break;
 278
 279                 case 0x60: /* get device parameters */
 280                            /* used by w4wgrp's winfile */
 281                         memset(dataptr, 0, 0x20); /* DOS 6.22 uses 0x20 bytes */
 282                         dataptr[0] = 0x04;
 283                         dataptr[6] = 0; /* media type */
 284                         if (drive > 1)
 285                         {
 286                                 dataptr[1] = 0x05; /* fixed disk */
 287                                 setword(&dataptr[2], 0x01); /* non removable */
 288                                 setword(&dataptr[4], 0x300); /* # of cylinders */
 289                         }
 290                         else
 291                         {
 292                                 dataptr[1] = 0x07; /* block dev, floppy */
 293                                 setword(&dataptr[2], 0x02); /* removable */
 294                                 setword(&dataptr[4], 80); /* # of cylinders */
 295                         }
 296                         CreateBPB(drive, &dataptr[7], TRUE);
 297                         RESET_CFLAG(context);
 298                         break;
 299
 300                 case 0x41: /* write logical device track */
 301                 case 0x61: /* read logical device track */
 302                         {
 303                                 BYTE drive = BL_reg(context) ?
 304                                                 BL_reg(context) : DRIVE_GetCurrentDrive();
 305                                 WORD head   = *(WORD *)dataptr+1;
 306                                 WORD cyl    = *(WORD *)dataptr+3;
 307                                 WORD sect   = *(WORD *)dataptr+5;
 308                                 WORD nrsect = *(WORD *)dataptr+7;
 309                                 BYTE *data  =  (BYTE *)dataptr+9;
 310                                 int (*raw_func)(BYTE, DWORD, DWORD, BYTE *, BOOL);
 311
 312                                 raw_func = (CL_reg(context) == 0x41) ?
 313                                                                 DRIVE_RawWrite : DRIVE_RawRead;
 314
 315                                 if (raw_func(drive, head*cyl*sect, nrsect, data, FALSE))
 316                                         RESET_CFLAG(context);
 317                                 else
 318                                 {
 319                                         AX_reg(context) = 0x1e; /* read fault */
 320                                         SET_CFLAG(context);
 321                                 }
 322                         }
 323                         break;
 324                 case 0x66:/*  get disk serial number */
 325                         {
 326                                 char    label[12],fsname[9],path[4];
 327                                 DWORD   serial;
 328
 329                                 strcpy(path,"x:\\");path[0]=drive+'A';
 330                                 GetVolumeInformationA(
 331                                         path,label,12,&serial,NULL,NULL,fsname,9
 332                                 );
 333                                 *(WORD*)dataptr         = 0;
 334                                 memcpy(dataptr+2,&serial,4);
 335                                 memcpy(dataptr+6,label  ,11);
 336                                 memcpy(dataptr+17,fsname,8);
 337                         }
 338                         break;
 339
 340                 case 0x6a:
 341                         TRACE("logical volume %d unlocked.\n",drive);
 342                         break;
 343
 344                 case 0x6f:
 345                         memset(dataptr+1, '\0', dataptr[0]-1);
 346                         dataptr[1] = dataptr[0];
 347                         dataptr[2] = 0x07; /* protected mode driver; no eject; no notification */
 348                         dataptr[3] = 0xFF; /* no physical drive */
 349                         break;
 350
 351                 case 0x72:
 352                         /* Trail on error implementation */
 353                         AX_reg(context) = GetDriveType16(BL_reg(context)) == DRIVE_CANNOTDETERMINE ? 0x0f : 0x01;
 354                         SET_CFLAG(context);     /* Seems to be set all the time */
 355                         break;
 356
 357                 default:
 358                         INT_BARF( context, 0x21 );
 359         }
 360         return FALSE;
 361 }
 362
 363 static void INT21_ParseFileNameIntoFCB( CONTEXT86 *context )
 364 {
 365     char *filename =
 366         CTX_SEG_OFF_TO_LIN(context, DS_reg(context), ESI_reg(context) );
 367     char *fcb =
 368         CTX_SEG_OFF_TO_LIN(context, ES_reg(context), EDI_reg(context) );
 369     char *buffer, *s, *d;
 370
 371     AL_reg(context) = 0xff; /* failed */
 372
 373     TRACE("filename: '%s'\n", filename);
 374
 375     buffer = HeapAlloc( GetProcessHeap(), 0, strlen(filename) + 1);
 376
 377     s = filename;
 378     d = buffer;
 379     while (*s)
 380     {
 381         if ((*s != ' ') && (*s != '\r') && (*s != '\n'))
 382             *d++ = *s++;
 383         else
 384             break;
 385     }
 386
 387     *d = '\0';
 388     DOSFS_ToDosFCBFormat(buffer, fcb + 1);
 389     *fcb = 0;
 390     TRACE("FCB: '%s'\n", ((CHAR *)fcb + 1));
 391
 392     HeapFree( GetProcessHeap(), 0, buffer);
 393
 394     AL_reg(context) =
 395         ((strchr(filename, '*')) || (strchr(filename, '$'))) != 0;
 396
 397     /* point DS:SI to first unparsed character */
 398     SI_reg(context) += (int)s - (int)filename;
 399 }
 400
 401 static void INT21_GetSystemDate( CONTEXT86 *context )
 402 {
 403     SYSTEMTIME systime;
 404     GetLocalTime( &systime );
 405     CX_reg(context) = systime.wYear;
 406     DX_reg(context) = (systime.wMonth << 8) | systime.wDay;
 407     AX_reg(context) = systime.wDayOfWeek;
 408 }
 409
 410 static void INT21_GetSystemTime( CONTEXT86 *context )
 411 {
 412     SYSTEMTIME systime;
 413     GetLocalTime( &systime );
 414     CX_reg(context) = (systime.wHour << 8) | systime.wMinute;
 415     DX_reg(context) = (systime.wSecond << 8) | (systime.wMilliseconds / 10);
 416 }
 417
 418 /* Many calls translate a drive argument like this:
 419    drive number (00h = default, 01h = A:, etc)
 420    */
 421 static char drivestring[]="default";
 422
 423 char *INT21_DriveName(int drive)
 424 {
 425
 426     if(drive >0)
 427       {
 428         drivestring[0]= (unsigned char)drive + '@';
 429         drivestring[1]=':';
 430         drivestring[2]=0;
 431       }
 432     return drivestring;
 433 }
 434 static BOOL INT21_CreateFile( CONTEXT86 *context )
 435 {
 436     AX_reg(context) = _lcreat16( CTX_SEG_OFF_TO_LIN(context, DS_reg(context),
 437                                           EDX_reg(context) ), CX_reg(context) );
 438     return (AX_reg(context) == (WORD)HFILE_ERROR16);
 439 }
 440
 441 static HFILE16 _lcreat16_uniq( LPCSTR path, INT attr )
 442 {
 443     /* Mask off all flags not explicitly allowed by the doc */
 444     attr &= FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM;
 445     return FILE_AllocDosHandle( CreateFileA( path, GENERIC_READ | GENERIC_WRITE,
 446                                              FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
 447                                              CREATE_NEW, attr, -1 ));
 448 }
 449
 450 static void OpenExistingFile( CONTEXT86 *context )
 451 {
 452     AX_reg(context) = _lopen16( CTX_SEG_OFF_TO_LIN(context, DS_reg(context),EDX_reg(context)),
 453                                AL_reg(context) );
 454     if (AX_reg(context) == (WORD)HFILE_ERROR16)
 455     {
 456         AX_reg(context) = GetLastError();
 457         SET_CFLAG(context);
 458     }
 459 }
 460
 461 static BOOL INT21_ExtendedOpenCreateFile(CONTEXT86 *context )
 462 {
 463   BOOL bExtendedError = FALSE;
 464   BYTE action = DL_reg(context);
 465
 466   /* Shuffle arguments to call OpenExistingFile */
 467   AL_reg(context) = BL_reg(context);
 468   DX_reg(context) = SI_reg(context);
 469   /* BX,CX and DX should be preserved */
 470   OpenExistingFile(context);
 471
 472   if ((EFL_reg(context) & 0x0001) == 0) /* File exists */
 473   {
 474       UINT16    uReturnCX = 0;
 475
 476       /* Now decide what do do */
 477
 478       if ((action & 0x07) == 0)
 479       {
 480           _lclose16( AX_reg(context) );
 481           AX_reg(context) = 0x0050;     /*File exists*/
 482           SET_CFLAG(context);
 483           WARN("extended open/create: failed because file exists \n");
 484       }
 485       else if ((action & 0x07) == 2)
 486       {
 487         /* Truncate it, but first check if opened for write */
 488         if ((BL_reg(context) & 0x0007)== 0)
 489         {
 490             _lclose16( AX_reg(context) );
 491             WARN("extended open/create: failed, trunc on ro file\n");
 492             AX_reg(context) = 0x000C;   /*Access code invalid*/
 493             SET_CFLAG(context);
 494         }
 495         else
 496         {
 497                 TRACE("extended open/create: Closing before truncate\n");
 498                 if (_lclose16( AX_reg(context) ))
 499                 {
 500                    WARN("extended open/create: close before trunc failed\n");
 501                    AX_reg(context) = 0x0019;    /*Seek Error*/
 502                    CX_reg(context) = 0;
 503                    SET_CFLAG(context);
 504                 }
 505                 /* Shuffle arguments to call CreateFile */
 506
 507                 TRACE("extended open/create: Truncating\n");
 508                 AL_reg(context) = BL_reg(context);
 509                 /* CX is still the same */
 510                 DX_reg(context) = SI_reg(context);
 511                 bExtendedError = INT21_CreateFile(context);
 512
 513                 if (EFL_reg(context) & 0x0001)  /*no file open, flags set */
 514                 {
 515                     WARN("extended open/create: trunc failed\n");
 516                     return bExtendedError;
 517                 }
 518                 uReturnCX = 0x3;
 519         }
 520       }
 521       else uReturnCX = 0x1;
 522
 523       CX_reg(context) = uReturnCX;
 524   }
 525   else /* file does not exist */
 526   {
 527       RESET_CFLAG(context); /* was set by OpenExistingFile(context) */
 528       if ((action & 0xF0)== 0)
 529       {
 530         CX_reg(context) = 0;
 531         SET_CFLAG(context);
 532         WARN("extended open/create: failed, file dosen't exist\n");
 533       }
 534       else
 535       {
 536         /* Shuffle arguments to call CreateFile */
 537         TRACE("extended open/create: Creating\n");
 538         AL_reg(context) = BL_reg(context);
 539         /* CX should still be the same */
 540         DX_reg(context) = SI_reg(context);
 541         bExtendedError = INT21_CreateFile(context);
 542         if (EFL_reg(context) & 0x0001)  /*no file open, flags set */
 543         {
 544             WARN("extended open/create: create failed\n");
 545             return bExtendedError;
 546         }
 547         CX_reg(context) = 2;
 548       }
 549   }
 550
 551   return bExtendedError;
 552 }
 553
 554
 555 static BOOL INT21_ChangeDir( CONTEXT86 *context )
 556 {
 557     int drive;
 558     char *dirname = CTX_SEG_OFF_TO_LIN(context, DS_reg(context),EDX_reg(context));
 559
 560     TRACE("changedir %s\n", dirname);
 561     if (dirname[0] && (dirname[1] == ':'))
 562     {
 563         drive = toupper(dirname[0]) - 'A';
 564         dirname += 2;
 565     }
 566     else drive = DRIVE_GetCurrentDrive();
 567     return DRIVE_Chdir( drive, dirname );
 568 }
 569
 570
 571 static int INT21_FindFirst( CONTEXT86 *context )
 572 {
 573     char *p;
 574     const char *path;
 575     DOS_FULL_NAME full_name;
 576     FINDFILE_DTA *dta = (FINDFILE_DTA *)GetCurrentDTA(context);
 577
 578     path = (const char *)CTX_SEG_OFF_TO_LIN(context, DS_reg(context), EDX_reg(context));
 579     dta->unixPath = NULL;
 580     if (!DOSFS_GetFullName( path, FALSE, &full_name ))
 581     {
 582         AX_reg(context) = GetLastError();
 583         SET_CFLAG(context);
 584         return 0;
 585     }
 586     dta->unixPath = HEAP_strdupA( GetProcessHeap(), 0, full_name.long_name );
 587     p = strrchr( dta->unixPath, '/' );
 588     *p = '\0';
 589
 590     /* Note: terminating NULL in dta->mask overwrites dta->search_attr
 591      *       (doesn't matter as it is set below anyway)
 592      */
 593     if (!DOSFS_ToDosFCBFormat( p + 1, dta->mask ))
 594     {
 595         HeapFree( GetProcessHeap(), 0, dta->unixPath );
 596         dta->unixPath = NULL;
 597         SetLastError( ERROR_FILE_NOT_FOUND );
 598         AX_reg(context) = ERROR_FILE_NOT_FOUND;
 599         SET_CFLAG(context);
 600         return 0;
 601     }
 602     dta->drive = (path[0] && (path[1] == ':')) ? toupper(path[0]) - 'A'
 603                                                : DRIVE_GetCurrentDrive();
 604     dta->count = 0;
 605     dta->search_attr = CL_reg(context);
 606     return 1;
 607 }
 608
 609
 610 static int INT21_FindNext( CONTEXT86 *context )
 611 {
 612     FINDFILE_DTA *dta = (FINDFILE_DTA *)GetCurrentDTA(context);
 613     WIN32_FIND_DATAA entry;
 614     int count;
 615
 616     if (!dta->unixPath) return 0;
 617     if (!(count = DOSFS_FindNext( dta->unixPath, dta->mask, NULL, dta->drive,
 618                                   dta->search_attr, dta->count, &entry )))
 619     {
 620         HeapFree( GetProcessHeap(), 0, dta->unixPath );
 621         dta->unixPath = NULL;
 622         return 0;
 623     }
 624     if ((int)dta->count + count > 0xffff)
 625     {
 626         WARN("Too many directory entries in %s\n", dta->unixPath );
 627         HeapFree( GetProcessHeap(), 0, dta->unixPath );
 628         dta->unixPath = NULL;
 629         return 0;
 630     }
 631     dta->count += count;
 632     dta->fileattr = entry.dwFileAttributes;
 633     dta->filesize = entry.nFileSizeLow;
 634     FileTimeToDosDateTime( &entry.ftLastWriteTime,
 635                            &dta->filedate, &dta->filetime );
 636     strcpy( dta->filename, entry.cAlternateFileName );
 637     if (!memchr(dta->mask,'?',11)) {
 638         /* wildcardless search, release resources in case no findnext will
 639          * be issued, and as a workaround in case file creation messes up
 640          * findnext, as sometimes happens with pkunzip */
 641         HeapFree( GetProcessHeap(), 0, dta->unixPath );
 642         dta->unixPath = NULL;
 643     }
 644     return 1;
 645 }
 646
 647
 648 static BOOL INT21_CreateTempFile( CONTEXT86 *context )
 649 {
 650     static int counter = 0;
 651     char *name = CTX_SEG_OFF_TO_LIN(context,  DS_reg(context), EDX_reg(context) );
 652     char *p = name + strlen(name);
 653
 654     /* despite what Ralf Brown says, some programs seem to call without
 655      * ending backslash (DOS accepts that, so we accept it too) */
 656     if ((p == name) || (p[-1] != '\\')) *p++ = '\\';
 657
 658     for (;;)
 659     {
 660         sprintf( p, "wine%04x.%03d", (int)getpid(), counter );
 661         counter = (counter + 1) % 1000;
 662
 663         if ((AX_reg(context) = _lcreat16_uniq( name, 0 )) != (WORD)HFILE_ERROR16)
 664         {
 665             TRACE("created %s\n", name );
 666             return TRUE;
 667         }
 668         if (GetLastError() != ERROR_FILE_EXISTS) return FALSE;
 669     }
 670 }
 671
 672
 673 static BOOL INT21_GetCurrentDirectory( CONTEXT86 *context )
 674 {
 675     int drive = DOS_GET_DRIVE( DL_reg(context) );
 676     char *ptr = (char *)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context), ESI_reg(context) );
 677
 678     if (!DRIVE_IsValid(drive))
 679     {
 680         SetLastError( ERROR_INVALID_DRIVE );
 681         return FALSE;
 682     }
 683     lstrcpynA( ptr, DRIVE_GetDosCwd(drive), 64 );
 684     AX_reg(context) = 0x0100;                        /* success return code */
 685     return TRUE;
 686 }
 687
 688
 689 static void INT21_GetDBCSLeadTable( CONTEXT86 *context )
 690 {
 691     if (heap || INT21_CreateHeap())
 692     { /* return an empty table just as DOS 4.0+ does */
 693         DS_reg(context) = DosHeapHandle;
 694         SI_reg(context) = (int)&heap->DummyDBCSLeadTable - (int)heap;
 695     }
 696     else
 697     {
 698         AX_reg(context) = 0x1; /* error */
 699         SET_CFLAG(context);
 700     }
 701 }
 702
 703
 704 static int INT21_GetDiskSerialNumber( CONTEXT86 *context )
 705 {
 706     BYTE *dataptr = CTX_SEG_OFF_TO_LIN(context, DS_reg(context), EDX_reg(context));
 707     int drive = DOS_GET_DRIVE( BL_reg(context) );
 708
 709     if (!DRIVE_IsValid(drive))
 710     {
 711         SetLastError( ERROR_INVALID_DRIVE );
 712         return 0;
 713     }
 714
 715     *(WORD *)dataptr = 0;
 716     *(DWORD *)(dataptr + 2) = DRIVE_GetSerialNumber( drive );
 717     memcpy( dataptr + 6, DRIVE_GetLabel( drive ), 11 );
 718     strncpy(dataptr + 0x11, "FAT16   ", 8);
 719     return 1;
 720 }
 721
 722
 723 static int INT21_SetDiskSerialNumber( CONTEXT86 *context )
 724 {
 725     BYTE *dataptr = CTX_SEG_OFF_TO_LIN(context, DS_reg(context), EDX_reg(context));
 726     int drive = DOS_GET_DRIVE( BL_reg(context) );
 727
 728     if (!DRIVE_IsValid(drive))
 729     {
 730         SetLastError( ERROR_INVALID_DRIVE );
 731         return 0;
 732     }
 733
 734     DRIVE_SetSerialNumber( drive, *(DWORD *)(dataptr + 2) );
 735     return 1;
 736 }
 737
 738
 739 /* microsoft's programmers should be shot for using CP/M style int21
 740    calls in Windows for Workgroup's winfile.exe */
 741
 742 static int INT21_FindFirstFCB( CONTEXT86 *context )
 743 {
 744     BYTE *fcb = (BYTE *)CTX_SEG_OFF_TO_LIN(context, DS_reg(context), EDX_reg(context));
 745     FINDFILE_FCB *pFCB;
 746     LPCSTR root, cwd;
 747     int drive;
 748
 749     if (*fcb == 0xff) pFCB = (FINDFILE_FCB *)(fcb + 7);
 750     else pFCB = (FINDFILE_FCB *)fcb;
 751     drive = DOS_GET_DRIVE( pFCB->drive );
 752     if (!DRIVE_IsValid( drive )) return 0;
 753     root = DRIVE_GetRoot( drive );
 754     cwd  = DRIVE_GetUnixCwd( drive );
 755     pFCB->unixPath = HeapAlloc( GetProcessHeap(), 0,
 756                                 strlen(root)+strlen(cwd)+2 );
 757     if (!pFCB->unixPath) return 0;
 758     strcpy( pFCB->unixPath, root );
 759     strcat( pFCB->unixPath, "/" );
 760     strcat( pFCB->unixPath, cwd );
 761     pFCB->count = 0;
 762     return 1;
 763 }
 764
 765
 766 static int INT21_FindNextFCB( CONTEXT86 *context )
 767 {
 768     BYTE *fcb = (BYTE *)CTX_SEG_OFF_TO_LIN(context, DS_reg(context), EDX_reg(context));
 769     FINDFILE_FCB *pFCB;
 770     DOS_DIRENTRY_LAYOUT *pResult = (DOS_DIRENTRY_LAYOUT *)GetCurrentDTA(context);
 771     WIN32_FIND_DATAA entry;
 772     BYTE attr;
 773     int count;
 774
 775     if (*fcb == 0xff) /* extended FCB ? */
 776     {
 777         attr = fcb[6];
 778         pFCB = (FINDFILE_FCB *)(fcb + 7);
 779     }
 780     else
 781     {
 782         attr = 0;
 783         pFCB = (FINDFILE_FCB *)fcb;
 784     }
 785
 786     if (!pFCB->unixPath) return 0;
 787     if (!(count = DOSFS_FindNext( pFCB->unixPath, pFCB->filename, NULL,
 788                                   DOS_GET_DRIVE( pFCB->drive ), attr,
 789                                   pFCB->count, &entry )))
 790     {
 791         HeapFree( GetProcessHeap(), 0, pFCB->unixPath );
 792         pFCB->unixPath = NULL;
 793         return 0;
 794     }
 795     pFCB->count += count;
 796
 797     if (*fcb == 0xff) { /* place extended FCB header before pResult if called with extended FCB */
 798         *(BYTE *)pResult = 0xff;
 799         (BYTE *)pResult +=6; /* leave reserved field behind */
 800         *(BYTE *)pResult = entry.dwFileAttributes;
 801         ((BYTE *)pResult)++;
 802     }
 803     *(BYTE *)pResult = DOS_GET_DRIVE( pFCB->drive ); /* DOS_DIRENTRY_LAYOUT after current drive number */
 804     ((BYTE *)pResult)++;
 805     pResult->fileattr = entry.dwFileAttributes;
 806     pResult->cluster  = 0;  /* what else? */
 807     pResult->filesize = entry.nFileSizeLow;
 808     memset( pResult->reserved, 0, sizeof(pResult->reserved) );
 809     FileTimeToDosDateTime( &entry.ftLastWriteTime,
 810                            &pResult->filedate, &pResult->filetime );
 811
 812     /* Convert file name to FCB format */
 813
 814     memset( pResult->filename, ' ', sizeof(pResult->filename) );
 815     if (!strcmp( entry.cAlternateFileName, "." )) pResult->filename[0] = '.';
 816     else if (!strcmp( entry.cAlternateFileName, ".." ))
 817         pResult->filename[0] = pResult->filename[1] = '.';
 818     else
 819     {
 820         char *p = strrchr( entry.cAlternateFileName, '.' );
 821         if (p && p[1] && (p != entry.cAlternateFileName))
 822         {
 823             memcpy( pResult->filename, entry.cAlternateFileName,
 824                     MIN( (p - entry.cAlternateFileName), 8 ) );
 825             memcpy( pResult->filename + 8, p + 1, MIN( strlen(p), 3 ) );
 826         }
 827         else
 828             memcpy( pResult->filename, entry.cAlternateFileName,
 829                     MIN( strlen(entry.cAlternateFileName), 8 ) );
 830     }
 831     return 1;
 832 }
 833
 834
 835 static void DeleteFileFCB( CONTEXT86 *context )
 836 {
 837     FIXME("(%p): stub\n", context);
 838 }
 839
 840 static void RenameFileFCB( CONTEXT86 *context )
 841 {
 842     FIXME("(%p): stub\n", context);
 843 }
 844
 845
 846
 847 static void fLock( CONTEXT86 * context )
 848 {
 849
 850     switch ( AX_reg(context) & 0xff )
 851     {
 852         case 0x00: /* LOCK */
 853           TRACE("lock handle %d offset %ld length %ld\n",
 854                 BX_reg(context),
 855                 MAKELONG(DX_reg(context),CX_reg(context)),
 856                 MAKELONG(DI_reg(context),SI_reg(context))) ;
 857           if (!LockFile(FILE_GetHandle(BX_reg(context)),
 858                         MAKELONG(DX_reg(context),CX_reg(context)), 0,
 859                         MAKELONG(DI_reg(context),SI_reg(context)), 0)) {
 860             AX_reg(context) = GetLastError();
 861             SET_CFLAG(context);
 862           }
 863           break;
 864
 865         case 0x01: /* UNLOCK */
 866           TRACE("unlock handle %d offset %ld length %ld\n",
 867                 BX_reg(context),
 868                 MAKELONG(DX_reg(context),CX_reg(context)),
 869                 MAKELONG(DI_reg(context),SI_reg(context))) ;
 870           if (!UnlockFile(FILE_GetHandle(BX_reg(context)),
 871                           MAKELONG(DX_reg(context),CX_reg(context)), 0,
 872                           MAKELONG(DI_reg(context),SI_reg(context)), 0)) {
 873             AX_reg(context) = GetLastError();
 874             SET_CFLAG(context);
 875           }
 876           return;
 877         default:
 878           AX_reg(context) = 0x0001;
 879           SET_CFLAG(context);
 880           return;
 881      }
 882 }
 883
 884 static BOOL
 885 INT21_networkfunc (CONTEXT86 *context)
 886 {
 887      switch (AL_reg(context)) {
 888      case 0x00: /* Get machine name. */
 889      {
 890           char *dst = CTX_SEG_OFF_TO_LIN (context,DS_reg(context),EDX_reg(context));
 891           TRACE("getting machine name to %p\n", dst);
 892           if (gethostname (dst, 15))
 893           {
 894                WARN("failed!\n");
 895                SetLastError( ER_NoNetwork );
 896                return TRUE;
 897           } else {
 898                int len = strlen (dst);
 899                while (len < 15)
 900                     dst[len++] = ' ';
 901                dst[15] = 0;
 902                CH_reg(context) = 1; /* Valid */
 903                CL_reg(context) = 1; /* NETbios number??? */
 904                TRACE("returning %s\n", debugstr_an (dst, 16));
 905                return FALSE;
 906           }
 907      }
 908
 909      default:
 910           SetLastError( ER_NoNetwork );
 911           return TRUE;
 912      }
 913 }
 914
 915 static void INT21_SetCurrentPSP(WORD psp)
 916 {
 917 #ifdef MZ_SUPPORTED
 918     TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
 919     NE_MODULE *pModule = pTask ? NE_GetPtr( pTask->hModule ) : NULL;
 920
 921     GlobalUnlock16( GetCurrentTask() );
 922     if (pModule->lpDosTask)
 923         pModule->lpDosTask->psp_seg = psp;
 924     else
 925 #endif
 926         ERR("Cannot change PSP for non-DOS task!\n");
 927 }
 928
 929 static WORD INT21_GetCurrentPSP()
 930 {
 931 #ifdef MZ_SUPPORTED
 932     TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
 933     NE_MODULE *pModule = pTask ? NE_GetPtr( pTask->hModule ) : NULL;
 934
 935     GlobalUnlock16( GetCurrentTask() );
 936     if (pModule->lpDosTask)
 937         return pModule->lpDosTask->psp_seg;
 938     else
 939 #endif
 940         return GetCurrentPDB16();
 941 }
 942
 943
 944 /***********************************************************************
 945  *           INT21_GetExtendedError
 946  */
 947 static void INT21_GetExtendedError( CONTEXT86 *context )
 948 {
 949     BYTE class, action, locus;
 950     WORD error = GetLastError();
 951
 952     switch(error)
 953     {
 954     case ERROR_SUCCESS:
 955         class = action = locus = 0;
 956         break;
 957     case ERROR_DIR_NOT_EMPTY:
 958         class  = EC_Exists;
 959         action = SA_Ignore;
 960         locus  = EL_Disk;
 961         break;
 962     case ERROR_ACCESS_DENIED:
 963         class  = EC_AccessDenied;
 964         action = SA_Abort;
 965         locus  = EL_Disk;
 966         break;
 967     case ERROR_CANNOT_MAKE:
 968         class  = EC_AccessDenied;
 969         action = SA_Abort;
 970         locus  = EL_Unknown;
 971         break;
 972     case ERROR_DISK_FULL:
 973     case ERROR_HANDLE_DISK_FULL:
 974         class  = EC_MediaError;
 975         action = SA_Abort;
 976         locus  = EL_Disk;
 977         break;
 978     case ERROR_FILE_EXISTS:
 979     case ERROR_ALREADY_EXISTS:
 980         class  = EC_Exists;
 981         action = SA_Abort;
 982         locus  = EL_Disk;
 983         break;
 984     case ERROR_FILE_NOT_FOUND:
 985         class  = EC_NotFound;
 986         action = SA_Abort;
 987         locus  = EL_Disk;
 988         break;
 989     case ER_GeneralFailure:
 990         class  = EC_SystemFailure;
 991         action = SA_Abort;
 992         locus  = EL_Unknown;
 993         break;
 994     case ERROR_INVALID_DRIVE:
 995         class  = EC_MediaError;
 996         action = SA_Abort;
 997         locus  = EL_Disk;
 998         break;
 999     case ERROR_INVALID_HANDLE:
1000         class  = EC_ProgramError;
1001         action = SA_Abort;
1002         locus  = EL_Disk;
1003         break;
1004     case ERROR_LOCK_VIOLATION:
1005         class  = EC_AccessDenied;
1006         action = SA_Abort;
1007         locus  = EL_Disk;
1008         break;
1009     case ERROR_NO_MORE_FILES:
1010         class  = EC_MediaError;
1011         action = SA_Abort;
1012         locus  = EL_Disk;
1013         break;
1014     case ER_NoNetwork:
1015         class  = EC_NotFound;
1016         action = SA_Abort;
1017         locus  = EL_Network;
1018         break;
1019     case ERROR_NOT_ENOUGH_MEMORY:
1020         class  = EC_OutOfResource;
1021         action = SA_Abort;
1022         locus  = EL_Memory;
1023         break;
1024     case ERROR_PATH_NOT_FOUND:
1025         class  = EC_NotFound;
1026         action = SA_Abort;
1027         locus  = EL_Disk;
1028         break;
1029     case ERROR_SEEK:
1030         class  = EC_NotFound;
1031         action = SA_Ignore;
1032         locus  = EL_Disk;
1033         break;
1034     case ERROR_SHARING_VIOLATION:
1035         class  = EC_Temporary;
1036         action = SA_Retry;
1037         locus  = EL_Disk;
1038         break;
1039     case ERROR_TOO_MANY_OPEN_FILES:
1040         class  = EC_ProgramError;
1041         action = SA_Abort;
1042         locus  = EL_Disk;
1043         break;
1044     default:
1045         FIXME("Unknown error %d\n", error );
1046         class  = EC_SystemFailure;
1047         action = SA_Abort;
1048         locus  = EL_Unknown;
1049         break;
1050     }
1051     TRACE("GET EXTENDED ERROR code 0x%02x class 0x%02x action 0x%02x locus %02x\n",
1052            error, class, action, locus );
1053     AX_reg(context) = error;
1054     BH_reg(context) = class;
1055     BL_reg(context) = action;
1056     CH_reg(context) = locus;
1057 }
1058
1059 /***********************************************************************
1060  *           DOS3Call  (KERNEL.102)
1061  */
1062 void WINAPI DOS3Call( CONTEXT86 *context )
1063 {
1064     BOOL        bSetDOSExtendedError = FALSE;
1065
1066
1067     TRACE("AX=%04x BX=%04x CX=%04x DX=%04x "
1068           "SI=%04x DI=%04x DS=%04x ES=%04x EFL=%08lx\n",
1069           AX_reg(context), BX_reg(context), CX_reg(context), DX_reg(context),
1070           SI_reg(context), DI_reg(context),
1071           (WORD)DS_reg(context), (WORD)ES_reg(context),
1072           EFL_reg(context) );
1073
1074
1075     if (AH_reg(context) == 0x59)  /* Get extended error info */
1076     {
1077         INT21_GetExtendedError( context );
1078         return;
1079     }
1080
1081     if (AH_reg(context) == 0x0C)  /* Flush buffer and read standard input */
1082     {
1083         TRACE("FLUSH BUFFER AND READ STANDARD INPUT\n");
1084         /* no flush here yet */
1085         AH_reg(context) = AL_reg(context);
1086     }
1087
1088     if (AH_reg(context)>=0x2f) {
1089         /* extended error is used by (at least) functions 0x2f to 0x62 */
1090         SetLastError(0);
1091     }
1092     RESET_CFLAG(context);  /* Not sure if this is a good idea */
1093
1094     switch(AH_reg(context))
1095     {
1096     case 0x03: /* READ CHARACTER FROM STDAUX  */
1097     case 0x04: /* WRITE CHARACTER TO STDAUX */
1098     case 0x05: /* WRITE CHARACTER TO PRINTER */
1099     case 0x0f: /* OPEN FILE USING FCB */
1100     case 0x10: /* CLOSE FILE USING FCB */
1101     case 0x14: /* SEQUENTIAL READ FROM FCB FILE */
1102     case 0x15: /* SEQUENTIAL WRITE TO FCB FILE */
1103     case 0x16: /* CREATE OR TRUNCATE FILE USING FCB */
1104     case 0x21: /* READ RANDOM RECORD FROM FCB FILE */
1105     case 0x22: /* WRITE RANDOM RECORD TO FCB FILE */
1106     case 0x23: /* GET FILE SIZE FOR FCB */
1107     case 0x24: /* SET RANDOM RECORD NUMBER FOR FCB */
1108     case 0x26: /* CREATE NEW PROGRAM SEGMENT PREFIX */
1109     case 0x27: /* RANDOM BLOCK READ FROM FCB FILE */
1110     case 0x28: /* RANDOM BLOCK WRITE TO FCB FILE */
1111         INT_BARF( context, 0x21 );
1112         break;
1113
1114     case 0x00: /* TERMINATE PROGRAM */
1115         TRACE("TERMINATE PROGRAM\n");
1116         ExitProcess( 0 );
1117         break;
1118
1119     case 0x01: /* READ CHARACTER FROM STANDARD INPUT, WITH ECHO */
1120         TRACE("DIRECT CHARACTER INPUT WITH ECHO\n");
1121         AL_reg(context) = CONSOLE_GetCharacter();
1122         /* FIXME: no echo */
1123         break;
1124
1125     case 0x02: /* WRITE CHARACTER TO STANDARD OUTPUT */
1126         TRACE("Write Character to Standard Output\n");
1127         CONSOLE_Write(DL_reg(context), 0, 0, 0);
1128         break;
1129
1130     case 0x06: /* DIRECT CONSOLE IN/OUTPUT */
1131         if (DL_reg(context) == 0xff) {
1132             static char scan = 0;
1133             TRACE("Direct Console Input\n");
1134             if (scan) {
1135                 /* return pending scancode */
1136                 AL_reg(context) = scan;
1137                 EFL_reg(context) &= ~0x40; /* clear ZF */
1138                 scan = 0;
1139             } else {
1140                 char ascii;
1141                 if (CONSOLE_CheckForKeystroke(&scan,&ascii)) {
1142                     CONSOLE_GetKeystroke(&scan,&ascii);
1143                     /* return ASCII code */
1144                     AL_reg(context) = ascii;
1145                     EFL_reg(context) &= ~0x40; /* clear ZF */
1146                     /* return scan code on next call only if ascii==0 */
1147                     if (ascii) scan = 0;
1148                 } else {
1149                     /* nothing pending, clear everything */
1150                     AL_reg(context) = 0;
1151                     EFL_reg(context) |= 0x40; /* set ZF */
1152                     scan = 0; /* just in case */
1153                 }
1154             }
1155         } else {
1156             TRACE("Direct Console Output\n");
1157             CONSOLE_Write(DL_reg(context), 0, 0, 0);
1158         }
1159         break;
1160
1161     case 0x07: /* DIRECT CHARACTER INPUT WITHOUT ECHO */
1162         TRACE("DIRECT CHARACTER INPUT WITHOUT ECHO\n");
1163         AL_reg(context) = CONSOLE_GetCharacter();
1164         break;
1165
1166     case 0x08: /* CHARACTER INPUT WITHOUT ECHO */
1167         TRACE("CHARACTER INPUT WITHOUT ECHO\n");
1168         AL_reg(context) = CONSOLE_GetCharacter();
1169         break;
1170
1171     case 0x09: /* WRITE STRING TO STANDARD OUTPUT */
1172         TRACE("WRITE '$'-terminated string from %04lX:%04X to stdout\n",
1173               DS_reg(context),DX_reg(context) );
1174         {
1175             LPSTR data = CTX_SEG_OFF_TO_LIN(context,DS_reg(context),EDX_reg(context));
1176             LPSTR p = data;
1177             /* do NOT use strchr() to calculate the string length,
1178             as '\0' is valid string content, too !
1179             Maybe we should check for non-'$' strings, but DOS doesn't. */
1180             while (*p != '$') p++;
1181             _hwrite16( 1, data, (int)p - (int)data);
1182             AL_reg(context) = '$'; /* yes, '$' (0x24) gets returned in AL */
1183         }
1184         break;
1185
1186     case 0x0a: /* BUFFERED INPUT */
1187       {
1188         char *buffer = ((char *)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context),
1189                                                    EDX_reg(context) ));
1190         int res;
1191
1192         TRACE("BUFFERED INPUT (size=%d)\n",buffer[0]);
1193         if (buffer[1])
1194           TRACE("Handle old chars in buffer!\n");
1195         res=_lread16( 0, buffer+2,buffer[0]);
1196         buffer[1]=res;
1197         if(buffer[res+1] == '\n')
1198           buffer[res+1] = '\r';
1199         break;
1200       }
1201
1202     case 0x0b: {/* GET STDIN STATUS */
1203                 char x1,x2;
1204
1205                 if (CONSOLE_CheckForKeystroke(&x1,&x2))
1206                     AL_reg(context) = 0xff;
1207                 else
1208                     AL_reg(context) = 0;
1209                 break;
1210         }
1211     case 0x2e: /* SET VERIFY FLAG */
1212         TRACE("SET VERIFY FLAG ignored\n");
1213         /* we cannot change the behaviour anyway, so just ignore it */
1214         break;
1215
1216     case 0x18: /* NULL FUNCTIONS FOR CP/M COMPATIBILITY */
1217     case 0x1d:
1218     case 0x1e:
1219     case 0x20:
1220     case 0x6b: /* NULL FUNCTION */
1221         AL_reg(context) = 0;
1222         break;
1223
1224     case 0x5c: /* "FLOCK" - RECORD LOCKING */
1225         fLock(context);
1226         break;
1227
1228     case 0x0d: /* DISK BUFFER FLUSH */
1229         TRACE("DISK BUFFER FLUSH ignored\n");
1230         RESET_CFLAG(context); /* dos 6+ only */
1231         break;
1232
1233     case 0x0e: /* SELECT DEFAULT DRIVE */
1234         TRACE("SELECT DEFAULT DRIVE %d\n", DL_reg(context));
1235         DRIVE_SetCurrentDrive( DL_reg(context) );
1236         AL_reg(context) = MAX_DOS_DRIVES;
1237         break;
1238
1239     case 0x11: /* FIND FIRST MATCHING FILE USING FCB */
1240         TRACE("FIND FIRST MATCHING FILE USING FCB %p\n",
1241               CTX_SEG_OFF_TO_LIN(context, DS_reg(context), EDX_reg(context)));
1242         if (!INT21_FindFirstFCB(context))
1243         {
1244             AL_reg(context) = 0xff;
1245             break;
1246         }
1247         /* else fall through */
1248
1249     case 0x12: /* FIND NEXT MATCHING FILE USING FCB */
1250         AL_reg(context) = INT21_FindNextFCB(context) ? 0x00 : 0xff;
1251         break;
1252
1253     case 0x13: /* DELETE FILE USING FCB */
1254         DeleteFileFCB(context);
1255         break;
1256
1257     case 0x17: /* RENAME FILE USING FCB */
1258         RenameFileFCB(context);
1259         break;
1260
1261     case 0x19: /* GET CURRENT DEFAULT DRIVE */
1262         AL_reg(context) = DRIVE_GetCurrentDrive();
1263         break;
1264
1265     case 0x1a: /* SET DISK TRANSFER AREA ADDRESS */
1266         {
1267             TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
1268             pTask->dta = PTR_SEG_OFF_TO_SEGPTR(DS_reg(context),DX_reg(context));
1269             TRACE("Set DTA: %08lx\n", pTask->dta);
1270         }
1271         break;
1272
1273     case 0x1b: /* GET ALLOCATION INFORMATION FOR DEFAULT DRIVE */
1274         DL_reg(context) = 0;
1275         if (!INT21_GetDriveAllocInfo(context)) AX_reg(context) = 0xffff;
1276         break;
1277
1278     case 0x1c: /* GET ALLOCATION INFORMATION FOR SPECIFIC DRIVE */
1279         if (!INT21_GetDriveAllocInfo(context)) AX_reg(context) = 0xffff;
1280         break;
1281
1282     case 0x1f: /* GET DRIVE PARAMETER BLOCK FOR DEFAULT DRIVE */
1283         GetDrivePB(context, DRIVE_GetCurrentDrive());
1284         break;
1285
1286     case 0x25: /* SET INTERRUPT VECTOR */
1287         INT_CtxSetHandler( context, AL_reg(context),
1288                         (FARPROC16)PTR_SEG_OFF_TO_SEGPTR( DS_reg(context),
1289                                                           DX_reg(context)));
1290         break;
1291
1292     case 0x29: /* PARSE FILENAME INTO FCB */
1293         INT21_ParseFileNameIntoFCB(context);
1294         break;
1295
1296     case 0x2a: /* GET SYSTEM DATE */
1297         INT21_GetSystemDate(context);
1298         break;
1299
1300     case 0x2b: /* SET SYSTEM DATE */
1301         FIXME("SetSystemDate(%02d/%02d/%04d): not allowed\n",
1302               DL_reg(context), DH_reg(context), CX_reg(context) );
1303         AL_reg(context) = 0;  /* Let's pretend we succeeded */
1304         break;
1305
1306     case 0x2c: /* GET SYSTEM TIME */
1307         INT21_GetSystemTime(context);
1308         break;
1309
1310     case 0x2d: /* SET SYSTEM TIME */
1311         FIXME("SetSystemTime(%02d:%02d:%02d.%02d): not allowed\n",
1312               CH_reg(context), CL_reg(context),
1313               DH_reg(context), DL_reg(context) );
1314         AL_reg(context) = 0;  /* Let's pretend we succeeded */
1315         break;
1316
1317     case 0x2f: /* GET DISK TRANSFER AREA ADDRESS */
1318         TRACE("GET DISK TRANSFER AREA ADDRESS\n");
1319         {
1320             TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
1321             ES_reg(context) = SELECTOROF( pTask->dta );
1322             BX_reg(context) = OFFSETOF( pTask->dta );
1323         }
1324         break;
1325
1326     case 0x30: /* GET DOS VERSION */
1327         TRACE("GET DOS VERSION %s requested\n",
1328               (AL_reg(context) == 0x00)?"OEM number":"version flag");
1329         AX_reg(context) = (HIWORD(GetVersion16()) >> 8) |
1330                           (HIWORD(GetVersion16()) << 8);
1331 #if 0
1332         AH_reg(context) = 0x7;
1333         AL_reg(context) = 0xA;
1334 #endif
1335
1336         BX_reg(context) = 0x00FF;     /* 0x123456 is Wine's serial # */
1337         CX_reg(context) = 0x0000;
1338         break;
1339
1340     case 0x31: /* TERMINATE AND STAY RESIDENT */
1341         FIXME("TERMINATE AND STAY RESIDENT stub\n");
1342         break;
1343
1344     case 0x32: /* GET DOS DRIVE PARAMETER BLOCK FOR SPECIFIC DRIVE */
1345         TRACE("GET DOS DRIVE PARAMETER BLOCK FOR DRIVE %s\n",
1346               INT21_DriveName( DL_reg(context)));
1347         GetDrivePB(context, DOS_GET_DRIVE( DL_reg(context) ) );
1348         break;
1349
1350     case 0x33: /* MULTIPLEXED */
1351         switch (AL_reg(context))
1352         {
1353               case 0x00: /* GET CURRENT EXTENDED BREAK STATE */
1354                 TRACE("GET CURRENT EXTENDED BREAK STATE\n");
1355                 DL_reg(context) = DOSCONF_config.brk_flag;
1356                 break;
1357
1358               case 0x01: /* SET EXTENDED BREAK STATE */
1359                 TRACE("SET CURRENT EXTENDED BREAK STATE\n");
1360                 DOSCONF_config.brk_flag = (DL_reg(context) > 0);
1361                 break;
1362
1363               case 0x02: /* GET AND SET EXTENDED CONTROL-BREAK CHECKING STATE*/
1364                 TRACE("GET AND SET EXTENDED CONTROL-BREAK CHECKING STATE\n");
1365                 /* ugly coding in order to stay reentrant */
1366                 if (DL_reg(context))
1367                 {
1368                     DL_reg(context) = DOSCONF_config.brk_flag;
1369                     DOSCONF_config.brk_flag = 1;
1370                 }
1371                 else
1372                 {
1373                     DL_reg(context) = DOSCONF_config.brk_flag;
1374                     DOSCONF_config.brk_flag = 0;
1375                 }
1376                 break;
1377
1378               case 0x05: /* GET BOOT DRIVE */
1379                 TRACE("GET BOOT DRIVE\n");
1380                 DL_reg(context) = 3;
1381                 /* c: is Wine's bootdrive (a: is 1)*/
1382                 break;
1383
1384               case 0x06: /* GET TRUE VERSION NUMBER */
1385                 TRACE("GET TRUE VERSION NUMBER\n");
1386                 BX_reg(context) = (HIWORD(GetVersion16() >> 8)) |
1387                                   (HIWORD(GetVersion16() << 8));
1388                 DX_reg(context) = 0x00;
1389                 break;
1390
1391               default:
1392                 INT_BARF( context, 0x21 );
1393                 break;
1394         }
1395         break;
1396
1397     case 0x34: /* GET ADDRESS OF INDOS FLAG */
1398         TRACE("GET ADDRESS OF INDOS FLAG\n");
1399         if (!heap) INT21_CreateHeap();
1400         ES_reg(context) = DosHeapHandle;
1401         BX_reg(context) = (int)&heap->InDosFlag - (int)heap;
1402         break;
1403
1404     case 0x35: /* GET INTERRUPT VECTOR */
1405         TRACE("GET INTERRUPT VECTOR 0x%02x\n",AL_reg(context));
1406         {
1407             FARPROC16 addr = INT_CtxGetHandler( context, AL_reg(context) );
1408             ES_reg(context) = SELECTOROF(addr);
1409             BX_reg(context) = OFFSETOF(addr);
1410         }
1411         break;
1412
1413     case 0x36: /* GET FREE DISK SPACE */
1414         TRACE("GET FREE DISK SPACE FOR DRIVE %s\n",
1415               INT21_DriveName( DL_reg(context)));
1416         if (!INT21_GetFreeDiskSpace(context)) AX_reg(context) = 0xffff;
1417         break;
1418
1419     case 0x37:
1420       {
1421         unsigned char switchchar='/';
1422         switch (AL_reg(context))
1423         {
1424         case 0x00: /* "SWITCHAR" - GET SWITCH CHARACTER */
1425           TRACE("SWITCHAR - GET SWITCH CHARACTER\n");
1426           AL_reg(context) = 0x00; /* success*/
1427           DL_reg(context) = switchchar;
1428           break;
1429         case 0x01: /*"SWITCHAR" - SET SWITCH CHARACTER*/
1430           TRACE("SWITCHAR - SET SWITCH CHARACTER\n");
1431           switchchar = DL_reg(context);
1432           AL_reg(context) = 0x00; /* success*/
1433           break;
1434         default: /*"AVAILDEV" - SPECIFY \DEV\ PREFIX USE*/
1435           INT_BARF( context, 0x21 );
1436           break;
1437         }
1438         break;
1439       }
1440
1441     case 0x38: /* GET COUNTRY-SPECIFIC INFORMATION */
1442         TRACE("GET COUNTRY-SPECIFIC INFORMATION for country 0x%02x\n",
1443               AL_reg(context));
1444         AX_reg(context) = 0x02; /* no country support available */
1445         SET_CFLAG(context);
1446         break;
1447
1448     case 0x39: /* "MKDIR" - CREATE SUBDIRECTORY */
1449         TRACE("MKDIR %s\n",
1450               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context), EDX_reg(context)));
1451         bSetDOSExtendedError = (!CreateDirectory16( CTX_SEG_OFF_TO_LIN(context,  DS_reg(context),
1452                                                            EDX_reg(context) ), NULL));
1453         /* FIXME: CreateDirectory's LastErrors will clash with the ones
1454          * used by dos. AH=39 only returns 3 (path not found) and 5 (access
1455          * denied), while CreateDirectory return several ones. remap some of
1456          * them. -Marcus
1457          */
1458         if (bSetDOSExtendedError) {
1459                 switch (GetLastError()) {
1460                 case ERROR_ALREADY_EXISTS:
1461                 case ERROR_FILENAME_EXCED_RANGE:
1462                 case ERROR_DISK_FULL:
1463                         SetLastError(ERROR_ACCESS_DENIED);
1464                         break;
1465                 default: break;
1466                 }
1467         }
1468         break;
1469
1470     case 0x3a: /* "RMDIR" - REMOVE SUBDIRECTORY */
1471         TRACE("RMDIR %s\n",
1472               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context), EDX_reg(context)));
1473         bSetDOSExtendedError = (!RemoveDirectory16( CTX_SEG_OFF_TO_LIN(context,  DS_reg(context),
1474                                                                  EDX_reg(context) )));
1475         break;
1476
1477     case 0x3b: /* "CHDIR" - SET CURRENT DIRECTORY */
1478         TRACE("CHDIR %s\n",
1479               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context), EDX_reg(context)));
1480         bSetDOSExtendedError = !INT21_ChangeDir(context);
1481         break;
1482
1483     case 0x3c: /* "CREAT" - CREATE OR TRUNCATE FILE */
1484         TRACE("CREAT flag 0x%02x %s\n",CX_reg(context),
1485               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context), EDX_reg(context)));
1486         bSetDOSExtendedError = INT21_CreateFile( context );
1487         break;
1488
1489     case 0x3d: /* "OPEN" - OPEN EXISTING FILE */
1490         TRACE("OPEN mode 0x%02x %s\n",AL_reg(context),
1491               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context), EDX_reg(context)));
1492         OpenExistingFile(context);
1493         break;
1494
1495     case 0x3e: /* "CLOSE" - CLOSE FILE */
1496         TRACE("CLOSE handle %d\n",BX_reg(context));
1497         bSetDOSExtendedError = ((AX_reg(context) = _lclose16( BX_reg(context) )) != 0);
1498         break;
1499
1500     case 0x3f: /* "READ" - READ FROM FILE OR DEVICE */
1501         TRACE("READ from %d to %04lX:%04X for %d byte\n",BX_reg(context),
1502               DS_reg(context),DX_reg(context),CX_reg(context) );
1503         {
1504             LONG result;
1505             if (ISV86(context))
1506                 result = _hread16( BX_reg(context),
1507                                    CTX_SEG_OFF_TO_LIN(context, DS_reg(context),
1508                                                                EDX_reg(context) ),
1509                                    CX_reg(context) );
1510             else
1511                 result = WIN16_hread( BX_reg(context),
1512                                       PTR_SEG_OFF_TO_SEGPTR( DS_reg(context),
1513                                                              EDX_reg(context) ),
1514                                       CX_reg(context) );
1515             if (result == -1) bSetDOSExtendedError = TRUE;
1516             else AX_reg(context) = (WORD)result;
1517         }
1518         break;
1519
1520     case 0x40: /* "WRITE" - WRITE TO FILE OR DEVICE */
1521         TRACE("WRITE from %04lX:%04X to handle %d for %d byte\n",
1522               DS_reg(context),DX_reg(context),BX_reg(context),CX_reg(context) );
1523         {
1524             LONG result = _hwrite16( BX_reg(context),
1525                                      CTX_SEG_OFF_TO_LIN(context,  DS_reg(context),
1526                                                          EDX_reg(context) ),
1527                                      CX_reg(context) );
1528             if (result == -1) bSetDOSExtendedError = TRUE;
1529             else AX_reg(context) = (WORD)result;
1530         }
1531         break;
1532
1533     case 0x41: /* "UNLINK" - DELETE FILE */
1534         TRACE("UNLINK%s\n",
1535               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context), EDX_reg(context)));
1536         bSetDOSExtendedError = (!DeleteFileA( CTX_SEG_OFF_TO_LIN(context,  DS_reg(context),
1537                                                              EDX_reg(context) )));
1538         break;
1539
1540     case 0x42: /* "LSEEK" - SET CURRENT FILE POSITION */
1541         TRACE("LSEEK handle %d offset %ld from %s\n",
1542               BX_reg(context), MAKELONG(DX_reg(context),CX_reg(context)),
1543               (AL_reg(context)==0)?"start of file":(AL_reg(context)==1)?
1544               "current file position":"end of file");
1545         {
1546             LONG status = _llseek16( BX_reg(context),
1547                                      MAKELONG(DX_reg(context),CX_reg(context)),
1548                                      AL_reg(context) );
1549             if (status == -1) bSetDOSExtendedError = TRUE;
1550             else
1551             {
1552                 AX_reg(context) = LOWORD(status);
1553                 DX_reg(context) = HIWORD(status);
1554             }
1555         }
1556         break;
1557
1558     case 0x43: /* FILE ATTRIBUTES */
1559         switch (AL_reg(context))
1560         {
1561         case 0x00:
1562             TRACE("GET FILE ATTRIBUTES for %s\n",
1563                   (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context), EDX_reg(context)));
1564             AX_reg(context) = (WORD)GetFileAttributesA(
1565                                           CTX_SEG_OFF_TO_LIN(context, DS_reg(context),
1566                                                              EDX_reg(context)));
1567             if (AX_reg(context) == 0xffff) bSetDOSExtendedError = TRUE;
1568             else CX_reg(context) = AX_reg(context);
1569             break;
1570
1571         case 0x01:
1572             TRACE("SET FILE ATTRIBUTES 0x%02x for %s\n", CX_reg(context),
1573                   (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context), EDX_reg(context)));
1574             bSetDOSExtendedError =
1575                 (!SetFileAttributesA( CTX_SEG_OFF_TO_LIN(context, DS_reg(context),
1576                                                            EDX_reg(context)),
1577                                                            CX_reg(context) ));
1578             break;
1579         case 0x02:
1580             TRACE("GET COMPRESSED FILE SIZE for %s stub\n",
1581                   (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context), EDX_reg(context)));
1582         }
1583         break;
1584
1585     case 0x44: /* IOCTL */
1586         switch (AL_reg(context))
1587         {
1588         case 0x00:
1589             ioctlGetDeviceInfo(context);
1590             break;
1591
1592         case 0x01:
1593             break;
1594         case 0x02:{
1595             const DOS_DEVICE *dev;
1596             if ((dev = DOSFS_GetDeviceByHandle( FILE_GetHandle(BX_reg(context)) )) &&
1597                 !strcasecmp( dev->name, "SCSIMGR$" ))
1598             {
1599                 ASPI_DOS_HandleInt(context);
1600             }
1601             break;
1602        }
1603         case 0x05:{     /* IOCTL - WRITE TO BLOCK DEVICE CONTROL CHANNEL */
1604             /*BYTE *dataptr = CTX_SEG_OFF_TO_LIN(context, DS_reg(context),EDX_reg(context));*/
1605             int drive = DOS_GET_DRIVE(BL_reg(context));
1606
1607             FIXME("program tried to write to block device control channel of drive %d:\n",drive);
1608             /* for (i=0;i<CX_reg(context);i++)
1609                 fprintf(stdnimp,"%02x ",dataptr[i]);
1610             fprintf(stdnimp,"\n");*/
1611             AX_reg(context)=CX_reg(context);
1612             break;
1613         }
1614         case 0x08:   /* Check if drive is removable. */
1615             TRACE("IOCTL - CHECK IF BLOCK DEVICE REMOVABLE for drive %s\n",
1616                  INT21_DriveName( BL_reg(context)));
1617             switch(GetDriveType16( DOS_GET_DRIVE( BL_reg(context) )))
1618             {
1619             case DRIVE_CANNOTDETERMINE:
1620                 SetLastError( ERROR_INVALID_DRIVE );
1621                 AX_reg(context) = ERROR_INVALID_DRIVE;
1622                 SET_CFLAG(context);
1623                 break;
1624             case DRIVE_REMOVABLE:
1625                 AX_reg(context) = 0;      /* removable */
1626                 break;
1627             default:
1628                 AX_reg(context) = 1;   /* not removable */
1629                 break;
1630             }
1631             break;
1632
1633         case 0x09:   /* CHECK IF BLOCK DEVICE REMOTE */
1634             TRACE("IOCTL - CHECK IF BLOCK DEVICE REMOTE for drive %s\n",
1635                  INT21_DriveName( BL_reg(context)));
1636             switch(GetDriveType16( DOS_GET_DRIVE( BL_reg(context) )))
1637             {
1638             case DRIVE_CANNOTDETERMINE:
1639                 SetLastError( ERROR_INVALID_DRIVE );
1640                 AX_reg(context) = ERROR_INVALID_DRIVE;
1641                 SET_CFLAG(context);
1642                 break;
1643             case DRIVE_REMOTE:
1644                 DX_reg(context) = (1<<9) | (1<<12);  /* remote */
1645                 break;
1646             default:
1647                 DX_reg(context) = 0;  /* FIXME: use driver attr here */
1648                 break;
1649             }
1650             break;
1651
1652         case 0x0a: /* check if handle (BX) is remote */
1653             TRACE("IOCTL - CHECK IF HANDLE %d IS REMOTE\n",BX_reg(context));
1654             /* returns DX, bit 15 set if remote, bit 14 set if date/time
1655              * not set on close
1656              */
1657             DX_reg(context) = 0;
1658             break;
1659
1660         case 0x0b:   /* SET SHARING RETRY COUNT */
1661             TRACE("IOCTL - SET SHARING RETRY COUNT pause %d retries %d\n",
1662                  CX_reg(context), DX_reg(context));
1663             if (!CX_reg(context))
1664             {
1665                 AX_reg(context) = 1;
1666                 SET_CFLAG(context);
1667                 break;
1668             }
1669             DOSMEM_LOL()->sharing_retry_delay = CX_reg(context);
1670             if (!DX_reg(context))
1671                 DOSMEM_LOL()->sharing_retry_count = DX_reg(context);
1672             RESET_CFLAG(context);
1673             break;
1674
1675         case 0x0d:
1676             TRACE("IOCTL - GENERIC BLOCK DEVICE REQUEST %s\n",
1677                   INT21_DriveName( BL_reg(context)));
1678             bSetDOSExtendedError = ioctlGenericBlkDevReq(context);
1679             break;
1680
1681         case 0x0e: /* get logical drive mapping */
1682             TRACE("IOCTL - GET LOGICAL DRIVE MAP for drive %s\n",
1683                   INT21_DriveName( BL_reg(context)));
1684             AL_reg(context) = 0; /* drive has no mapping - FIXME: may be wrong*/
1685             break;
1686
1687         case 0x0F:   /* Set logical drive mapping */
1688             {
1689             int drive;
1690             TRACE("IOCTL - SET LOGICAL DRIVE MAP for drive %s\n",
1691                   INT21_DriveName( BL_reg(context)));
1692             drive = DOS_GET_DRIVE ( BL_reg(context) );
1693             if ( ! DRIVE_SetLogicalMapping ( drive, drive+1 ) )
1694             {
1695                 SET_CFLAG(context);
1696                 AX_reg(context) = 0x000F;  /* invalid drive */
1697             }
1698             break;
1699             }
1700
1701         case 0xe0:  /* Sun PC-NFS API */
1702             /* not installed */
1703             break;
1704
1705         default:
1706             INT_BARF( context, 0x21 );
1707             break;
1708         }
1709         break;
1710
1711     case 0x45: /* "DUP" - DUPLICATE FILE HANDLE */
1712         {
1713             HANDLE handle;
1714             TRACE("DUP - DUPLICATE FILE HANDLE %d\n",BX_reg(context));
1715             if ((bSetDOSExtendedError = !DuplicateHandle( GetCurrentProcess(),
1716                                                           FILE_GetHandle(BX_reg(context)),
1717                                                           GetCurrentProcess(), &handle,
1718                                                           0, TRUE, DUPLICATE_SAME_ACCESS )))
1719                 AX_reg(context) = HFILE_ERROR16;
1720             else
1721                 AX_reg(context) = FILE_AllocDosHandle(handle);
1722             break;
1723         }
1724
1725     case 0x46: /* "DUP2", "FORCEDUP" - FORCE DUPLICATE FILE HANDLE */
1726         TRACE("FORCEDUP - FORCE DUPLICATE FILE HANDLE %d to %d\n",
1727               BX_reg(context),CX_reg(context));
1728         bSetDOSExtendedError = (FILE_Dup2( BX_reg(context), CX_reg(context) ) == HFILE_ERROR16);
1729         break;
1730
1731     case 0x47: /* "CWD" - GET CURRENT DIRECTORY */
1732         TRACE("CWD - GET CURRENT DIRECTORY for drive %s\n",
1733               INT21_DriveName( DL_reg(context)));
1734         bSetDOSExtendedError = !INT21_GetCurrentDirectory(context);
1735         break;
1736
1737     case 0x48: /* ALLOCATE MEMORY */
1738         TRACE("ALLOCATE MEMORY for %d paragraphs\n", BX_reg(context));
1739         {
1740             LPVOID *mem;
1741             if (ISV86(context))
1742               {
1743                 mem= DOSMEM_GetBlock(0,(DWORD)BX_reg(context)<<4,NULL);
1744             if (mem)
1745                 AX_reg(context) = DOSMEM_MapLinearToDos(mem)>>4;
1746               }
1747             else
1748               {
1749                 mem = (LPVOID)GlobalDOSAlloc16(BX_reg(context)<<4);
1750                 if (mem)
1751                   AX_reg(context) = (DWORD)mem&0xffff;
1752               }
1753             if (!mem)
1754               {
1755                 SET_CFLAG(context);
1756                 AX_reg(context) = 0x0008; /* insufficient memory */
1757                 BX_reg(context) = DOSMEM_Available(0)>>4;
1758             }
1759         }
1760         break;
1761
1762     case 0x49: /* FREE MEMORY */
1763         TRACE("FREE MEMORY segment %04lX\n", ES_reg(context));
1764         {
1765           BOOL ret;
1766           if (ISV86(context))
1767             ret= DOSMEM_FreeBlock(0,DOSMEM_MapDosToLinear(ES_reg(context)<<4));
1768           else
1769             {
1770               ret = !GlobalDOSFree16(ES_reg(context));
1771               /* If we don't reset ES_reg, we will fail in the relay code */
1772               ES_reg(context)=ret;
1773             }
1774           if (!ret)
1775             {
1776               TRACE("FREE MEMORY failed\n");
1777             SET_CFLAG(context);
1778             AX_reg(context) = 0x0009; /* memory block address invalid */
1779         }
1780         }
1781         break;
1782
1783     case 0x4a: /* RESIZE MEMORY BLOCK */
1784         TRACE("RESIZE MEMORY segment %04lX to %d paragraphs\n", ES_reg(context), BX_reg(context));
1785         if (!ISV86(context))
1786           FIXME("RESIZE MEMORY probably insufficient implementation. Expect crash soon\n");
1787         {
1788             LPVOID *mem = DOSMEM_ResizeBlock(0,DOSMEM_MapDosToLinear(ES_reg(context)<<4),
1789                                                BX_reg(context)<<4,NULL);
1790             if (mem)
1791                 AX_reg(context) = DOSMEM_MapLinearToDos(mem)>>4;
1792             else {
1793                 SET_CFLAG(context);
1794                 AX_reg(context) = 0x0008; /* insufficient memory */
1795                 BX_reg(context) = DOSMEM_Available(0)>>4; /* not quite right */
1796             }
1797         }
1798         break;
1799
1800     case 0x4b: /* "EXEC" - LOAD AND/OR EXECUTE PROGRAM */
1801         TRACE("EXEC %s\n",
1802               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context),EDX_reg(context) ));
1803         AX_reg(context) = WinExec16( CTX_SEG_OFF_TO_LIN(context,  DS_reg(context),
1804                                                          EDX_reg(context) ),
1805                                      SW_NORMAL );
1806         if (AX_reg(context) < 32) SET_CFLAG(context);
1807         break;
1808
1809     case 0x4c: /* "EXIT" - TERMINATE WITH RETURN CODE */
1810         TRACE("EXIT with return code %d\n",AL_reg(context));
1811         ExitProcess( AL_reg(context) );
1812         break;
1813
1814     case 0x4d: /* GET RETURN CODE */
1815         TRACE("GET RETURN CODE (ERRORLEVEL)\n");
1816         AX_reg(context) = 0; /* normal exit */
1817         break;
1818
1819     case 0x4e: /* "FINDFIRST" - FIND FIRST MATCHING FILE */
1820         TRACE("FINDFIRST mask 0x%04x spec %s\n",CX_reg(context),
1821               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context), EDX_reg(context)));
1822         if (!INT21_FindFirst(context)) break;
1823         /* fall through */
1824
1825     case 0x4f: /* "FINDNEXT" - FIND NEXT MATCHING FILE */
1826         TRACE("FINDNEXT\n");
1827         if (!INT21_FindNext(context))
1828         {
1829             SetLastError( ERROR_NO_MORE_FILES );
1830             AX_reg(context) = ERROR_NO_MORE_FILES;
1831             SET_CFLAG(context);
1832         }
1833         else AX_reg(context) = 0;  /* OK */
1834         break;
1835     case 0x50: /* SET CURRENT PROCESS ID (SET PSP ADDRESS) */
1836         TRACE("SET CURRENT PROCESS ID (SET PSP ADDRESS)\n");
1837         INT21_SetCurrentPSP(BX_reg(context));
1838         break;
1839     case 0x51: /* GET PSP ADDRESS */
1840         TRACE("GET CURRENT PROCESS ID (GET PSP ADDRESS)\n");
1841         /* FIXME: should we return the original DOS PSP upon */
1842         /*        Windows startup ? */
1843         BX_reg(context) = INT21_GetCurrentPSP();
1844         break;
1845     case 0x62: /* GET PSP ADDRESS */
1846         TRACE("GET CURRENT PSP ADDRESS\n");
1847         /* FIXME: should we return the original DOS PSP upon */
1848         /*        Windows startup ? */
1849         BX_reg(context) = INT21_GetCurrentPSP();
1850         break;
1851
1852     case 0x52: /* "SYSVARS" - GET LIST OF LISTS */
1853         TRACE("SYSVARS - GET LIST OF LISTS\n");
1854         {
1855             ES_reg(context) = ISV86(context) ? HIWORD(DOS_LOLSeg) : LOWORD(DOS_LOLSeg);
1856             BX_reg(context) = FIELD_OFFSET(DOS_LISTOFLISTS, ptr_first_DPB);
1857         }
1858         break;
1859
1860     case 0x54: /* Get Verify Flag */
1861         TRACE("Get Verify Flag - Not Supported\n");
1862         AL_reg(context) = 0x00;  /* pretend we can tell. 00h = off 01h = on */
1863         break;
1864
1865     case 0x56: /* "RENAME" - RENAME FILE */
1866         TRACE("RENAME %s to %s\n",
1867               (LPCSTR)CTX_SEG_OFF_TO_LIN(context, DS_reg(context),EDX_reg(context)),
1868               (LPCSTR)CTX_SEG_OFF_TO_LIN(context, ES_reg(context),EDI_reg(context)));
1869         bSetDOSExtendedError =
1870                 (!MoveFileA( CTX_SEG_OFF_TO_LIN(context, DS_reg(context),EDX_reg(context)),
1871                                CTX_SEG_OFF_TO_LIN(context, ES_reg(context),EDI_reg(context))));
1872         break;
1873
1874     case 0x57: /* FILE DATE AND TIME */
1875         switch (AL_reg(context))
1876         {
1877         case 0x00:  /* Get */
1878             {
1879                 FILETIME filetime;
1880                 TRACE("GET FILE DATE AND TIME for handle %d\n",
1881                       BX_reg(context));
1882                 if (!GetFileTime( FILE_GetHandle(BX_reg(context)), NULL, NULL, &filetime ))
1883                      bSetDOSExtendedError = TRUE;
1884                 else FileTimeToDosDateTime( &filetime, &DX_reg(context),
1885                                             &CX_reg(context) );
1886             }
1887             break;
1888
1889         case 0x01:  /* Set */
1890             {
1891                 FILETIME filetime;
1892                 TRACE("SET FILE DATE AND TIME for handle %d\n",
1893                       BX_reg(context));
1894                 DosDateTimeToFileTime( DX_reg(context), CX_reg(context),
1895                                        &filetime );
1896                 bSetDOSExtendedError =
1897                         (!SetFileTime( FILE_GetHandle(BX_reg(context)),
1898                                       NULL, NULL, &filetime ));
1899             }
1900             break;
1901         }
1902         break;
1903
1904     case 0x58: /* GET OR SET MEMORY/UMB ALLOCATION STRATEGY */
1905         TRACE("GET OR SET MEMORY/UMB ALLOCATION STRATEGY subfunction %d\n",
1906               AL_reg(context));
1907         switch (AL_reg(context))
1908         {
1909         case 0x00:
1910             AX_reg(context) = 1;
1911             break;
1912         case 0x02:
1913             AX_reg(context) = 0;
1914             break;
1915         case 0x01:
1916         case 0x03:
1917             break;
1918         }
1919         RESET_CFLAG(context);
1920         break;
1921
1922     case 0x5a: /* CREATE TEMPORARY FILE */
1923         TRACE("CREATE TEMPORARY FILE\n");
1924         bSetDOSExtendedError = !INT21_CreateTempFile(context);
1925         break;
1926
1927     case 0x5b: /* CREATE NEW FILE */
1928         TRACE("CREATE NEW FILE 0x%02x for %s\n", CX_reg(context),
1929               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context), EDX_reg(context)));
1930         bSetDOSExtendedError = ((AX_reg(context) =
1931                _lcreat16_uniq( CTX_SEG_OFF_TO_LIN(context, DS_reg(context),EDX_reg(context)),
1932                                CX_reg(context) )) == (WORD)HFILE_ERROR16);
1933         break;
1934
1935     case 0x5d: /* NETWORK */
1936         FIXME("Function 0x%04x not implemented.\n", AX_reg (context));
1937         /* Fix the following while you're at it.  */
1938         SetLastError( ER_NoNetwork );
1939         bSetDOSExtendedError = TRUE;
1940         break;
1941
1942     case 0x5e:
1943         bSetDOSExtendedError = INT21_networkfunc (context);
1944         break;
1945
1946     case 0x5f: /* NETWORK */
1947         switch (AL_reg(context))
1948         {
1949         case 0x07: /* ENABLE DRIVE */
1950             TRACE("ENABLE DRIVE %c:\n",(DL_reg(context)+'A'));
1951             if (!DRIVE_Enable( DL_reg(context) ))
1952             {
1953                 SetLastError( ERROR_INVALID_DRIVE );
1954                 bSetDOSExtendedError = TRUE;
1955             }
1956             break;
1957
1958         case 0x08: /* DISABLE DRIVE */
1959             TRACE("DISABLE DRIVE %c:\n",(DL_reg(context)+'A'));
1960             if (!DRIVE_Disable( DL_reg(context) ))
1961             {
1962                 SetLastError( ERROR_INVALID_DRIVE );
1963                 bSetDOSExtendedError = TRUE;
1964             }
1965             break;
1966
1967         default:
1968             /* network software not installed */
1969             TRACE("NETWORK function AX=%04x not implemented\n",AX_reg(context));
1970             SetLastError( ER_NoNetwork );
1971             bSetDOSExtendedError = TRUE;
1972             break;
1973         }
1974         break;
1975
1976     case 0x60: /* "TRUENAME" - CANONICALIZE FILENAME OR PATH */
1977         TRACE("TRUENAME %s\n",
1978               (LPCSTR)CTX_SEG_OFF_TO_LIN(context, DS_reg(context),ESI_reg(context)));
1979         {
1980             if (!GetFullPathNameA( CTX_SEG_OFF_TO_LIN(context, DS_reg(context),
1981                                                         ESI_reg(context)), 128,
1982                                      CTX_SEG_OFF_TO_LIN(context, ES_reg(context),
1983                                                         EDI_reg(context)),NULL))
1984                 bSetDOSExtendedError = TRUE;
1985             else AX_reg(context) = 0;
1986         }
1987         break;
1988
1989     case 0x61: /* UNUSED */
1990     case 0x63: /* misc. language support */
1991         switch (AL_reg(context)) {
1992         case 0x00: /* GET DOUBLE BYTE CHARACTER SET LEAD-BYTE TABLE */
1993             INT21_GetDBCSLeadTable(context);
1994             break;
1995         }
1996         break;
1997     case 0x64: /* OS/2 DOS BOX */
1998         INT_BARF( context, 0x21 );
1999         SET_CFLAG(context);
2000         break;
2001
2002     case 0x65:{/* GET EXTENDED COUNTRY INFORMATION */
2003         extern WORD WINE_LanguageId;
2004         BYTE    *dataptr=CTX_SEG_OFF_TO_LIN(context, ES_reg(context),EDI_reg(context));
2005         TRACE("GET EXTENDED COUNTRY INFORMATION code page %d country %d\n",
2006               BX_reg(context), DX_reg(context));
2007         switch (AL_reg(context)) {
2008         case 0x01:
2009             TRACE("\tget general internationalization info\n");
2010             dataptr[0] = 0x1;
2011             *(WORD*)(dataptr+1) = 41;
2012             *(WORD*)(dataptr+3) = WINE_LanguageId;
2013             *(WORD*)(dataptr+5) = CodePage;
2014             *(DWORD*)(dataptr+0x19) = 0; /* FIXME: ptr to case map routine */
2015             break;
2016         case 0x06:
2017             TRACE("\tget pointer to collating sequence table\n");
2018             dataptr[0] = 0x06;
2019             *(DWORD*)(dataptr+1) = MAKELONG(DOSMEM_CollateTable & 0xFFFF,DOSMEM_AllocSelector(DOSMEM_CollateTable>>16));
2020             CX_reg(context)         = 258;/*FIXME: size of table?*/
2021             break;
2022         case 0x20:
2023             TRACE("\tConvert char to uppercase\n");
2024             DL_reg(context) = toupper(DL_reg(context));
2025             break;
2026         case 0x21:
2027             TRACE("\tconvert string to uppercase with length\n");
2028             CharUpperBuffA( (LPSTR)CTX_SEG_OFF_TO_LIN(context,DS_reg(context),EDX_reg(context)),
2029                             CX_reg(context) );
2030             break;
2031         case 0x22:
2032             TRACE("\tConvert ASCIIZ string to uppercase\n");
2033             CharUpperA( (LPSTR)CTX_SEG_OFF_TO_LIN(context,DS_reg(context),EDX_reg(context)) );
2034             break;
2035         default:
2036             TRACE("\tunimplemented function %d\n",AL_reg(context));
2037             INT_BARF( context, 0x21 );
2038             SET_CFLAG(context);
2039             break;
2040         }
2041         break;
2042     }
2043     case 0x66: /* GLOBAL CODE PAGE TABLE */
2044         switch (AL_reg(context))
2045         {
2046         case 0x01:
2047             TRACE("GET GLOBAL CODE PAGE TABLE\n");
2048             DX_reg(context) = BX_reg(context) = CodePage;
2049             RESET_CFLAG(context);
2050             break;
2051         case 0x02:
2052             TRACE("SET GLOBAL CODE PAGE TABLE active page %d system page %d\n",
2053                   BX_reg(context),DX_reg(context));
2054             CodePage = BX_reg(context);
2055             RESET_CFLAG(context);
2056             break;
2057         }
2058         break;
2059
2060     case 0x67: /* SET HANDLE COUNT */
2061         TRACE("SET HANDLE COUNT to %d\n",BX_reg(context) );
2062         SetHandleCount16( BX_reg(context) );
2063         if (GetLastError()) bSetDOSExtendedError = TRUE;
2064         break;
2065
2066     case 0x68: /* "FFLUSH" - COMMIT FILE */
2067     case 0x6a: /* COMMIT FILE */
2068         TRACE("FFLUSH/COMMIT handle %d\n",BX_reg(context));
2069         bSetDOSExtendedError = (!FlushFileBuffers( FILE_GetHandle(BX_reg(context)) ));
2070         break;
2071
2072     case 0x69: /* DISK SERIAL NUMBER */
2073         switch (AL_reg(context))
2074         {
2075         case 0x00:
2076             TRACE("GET DISK SERIAL NUMBER for drive %s\n",
2077                   INT21_DriveName(BL_reg(context)));
2078             if (!INT21_GetDiskSerialNumber(context)) bSetDOSExtendedError = TRUE;
2079             else AX_reg(context) = 0;
2080             break;
2081
2082         case 0x01:
2083             TRACE("SET DISK SERIAL NUMBER for drive %s\n",
2084                   INT21_DriveName(BL_reg(context)));
2085             if (!INT21_SetDiskSerialNumber(context)) bSetDOSExtendedError = TRUE;
2086             else AX_reg(context) = 1;
2087             break;
2088         }
2089         break;
2090
2091     case 0x6C: /* Extended Open/Create*/
2092         TRACE("EXTENDED OPEN/CREATE %s\n",
2093               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context), EDI_reg(context)));
2094         bSetDOSExtendedError = INT21_ExtendedOpenCreateFile(context);
2095         break;
2096
2097     case 0x71: /* MS-DOS 7 (Windows95) - LONG FILENAME FUNCTIONS */
2098         if ((GetVersion()&0xC0000004)!=0xC0000004) {
2099             /* not supported on anything but Win95 */
2100             TRACE("LONG FILENAME functions supported only by win95\n");
2101             SET_CFLAG(context);
2102             AL_reg(context) = 0;
2103         } else
2104         switch(AL_reg(context))
2105         {
2106         case 0x39:  /* Create directory */
2107             TRACE("LONG FILENAME - MAKE DIRECTORY %s\n",
2108                   (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context),EDX_reg(context)));
2109             bSetDOSExtendedError = (!CreateDirectoryA(
2110                                         CTX_SEG_OFF_TO_LIN(context,  DS_reg(context),
2111                                                   EDX_reg(context) ), NULL));
2112             /* FIXME: CreateDirectory's LastErrors will clash with the ones
2113              * used by dos. AH=39 only returns 3 (path not found) and 5 (access
2114              * denied), while CreateDirectory return several ones. remap some of
2115              * them. -Marcus
2116              */
2117             if (bSetDOSExtendedError) {
2118                     switch (GetLastError()) {
2119                     case ERROR_ALREADY_EXISTS:
2120                     case ERROR_FILENAME_EXCED_RANGE:
2121                     case ERROR_DISK_FULL:
2122                             SetLastError(ERROR_ACCESS_DENIED);
2123                             break;
2124                     default: break;
2125                     }
2126             }
2127             break;
2128         case 0x3a:  /* Remove directory */
2129             TRACE("LONG FILENAME - REMOVE DIRECTORY %s\n",
2130                   (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context),EDX_reg(context)));
2131             bSetDOSExtendedError = (!RemoveDirectoryA(
2132                                         CTX_SEG_OFF_TO_LIN(context,  DS_reg(context),
2133                                                         EDX_reg(context) )));
2134             break;
2135         case 0x43:  /* Get/Set file attributes */
2136           TRACE("LONG FILENAME -EXTENDED GET/SET FILE ATTRIBUTES %s\n",
2137                 (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context),EDX_reg(context)));
2138         switch (BL_reg(context))
2139         {
2140         case 0x00: /* Get file attributes */
2141             TRACE("\tretrieve attributes\n");
2142             CX_reg(context) = (WORD)GetFileAttributesA(
2143                                           CTX_SEG_OFF_TO_LIN(context, DS_reg(context),
2144                                                              EDX_reg(context)));
2145             if (CX_reg(context) == 0xffff) bSetDOSExtendedError = TRUE;
2146             break;
2147         case 0x01:
2148             TRACE("\tset attributes 0x%04x\n",CX_reg(context));
2149             bSetDOSExtendedError = (!SetFileAttributesA(
2150                                         CTX_SEG_OFF_TO_LIN(context, DS_reg(context),
2151                                                            EDX_reg(context)),
2152                                         CX_reg(context)  ) );
2153             break;
2154         default:
2155           FIXME("Unimplemented long file name function:\n");
2156           INT_BARF( context, 0x21 );
2157           SET_CFLAG(context);
2158           AL_reg(context) = 0;
2159           break;
2160         }
2161         break;
2162         case 0x47:  /* Get current directory */
2163             TRACE(" LONG FILENAME - GET CURRENT DIRECTORY for drive %s\n",
2164                   INT21_DriveName(DL_reg(context)));
2165             bSetDOSExtendedError = !INT21_GetCurrentDirectory(context);
2166             break;
2167
2168         case 0x4e:  /* Find first file */
2169             TRACE(" LONG FILENAME - FIND FIRST MATCHING FILE for %s\n",
2170                   (LPCSTR)CTX_SEG_OFF_TO_LIN(context, DS_reg(context),EDX_reg(context)));
2171             /* FIXME: use attributes in CX */
2172             if ((AX_reg(context) = FindFirstFile16(
2173                    CTX_SEG_OFF_TO_LIN(context, DS_reg(context),EDX_reg(context)),
2174                    (WIN32_FIND_DATAA *)CTX_SEG_OFF_TO_LIN(context, ES_reg(context),
2175                                                             EDI_reg(context))))
2176                 == INVALID_HANDLE_VALUE16)
2177                 bSetDOSExtendedError = TRUE;
2178             break;
2179         case 0x4f:  /* Find next file */
2180             TRACE("LONG FILENAME - FIND NEXT MATCHING FILE for handle %d\n",
2181                   BX_reg(context));
2182             if (!FindNextFile16( BX_reg(context),
2183                     (WIN32_FIND_DATAA *)CTX_SEG_OFF_TO_LIN(context, ES_reg(context),
2184                                                              EDI_reg(context))))
2185                 bSetDOSExtendedError = TRUE;
2186             break;
2187         case 0xa1:  /* Find close */
2188             TRACE("LONG FILENAME - FINDCLOSE for handle %d\n",
2189                   BX_reg(context));
2190             bSetDOSExtendedError = (!FindClose16( BX_reg(context) ));
2191             break;
2192         case 0xa0:
2193             TRACE("LONG FILENAME - GET VOLUME INFORMATION for drive %s stub\n",
2194                   (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context),EDX_reg(context)));
2195             break;
2196         case 0x60:
2197           switch(CL_reg(context))
2198           {
2199             case 0x01:  /*Get short filename or path */
2200               if (!GetShortPathNameA
2201                   ( CTX_SEG_OFF_TO_LIN(context, DS_reg(context),
2202                                        ESI_reg(context)),
2203                     CTX_SEG_OFF_TO_LIN(context, ES_reg(context),
2204                                        EDI_reg(context)), 67))
2205                 bSetDOSExtendedError = TRUE;
2206               else AX_reg(context) = 0;
2207               break;
2208             case 0x02:  /*Get canonical long filename or path */
2209               if (!GetFullPathNameA
2210                   ( CTX_SEG_OFF_TO_LIN(context, DS_reg(context),
2211                                        ESI_reg(context)), 128,
2212                     CTX_SEG_OFF_TO_LIN(context, ES_reg(context),
2213                                        EDI_reg(context)),NULL))
2214                 bSetDOSExtendedError = TRUE;
2215               else AX_reg(context) = 0;
2216               break;
2217             default:
2218               FIXME("Unimplemented long file name function:\n");
2219               INT_BARF( context, 0x21 );
2220               SET_CFLAG(context);
2221               AL_reg(context) = 0;
2222               break;
2223           }
2224             break;
2225         case 0x6c:  /* Create or open file */
2226             TRACE("LONG FILENAME - CREATE OR OPEN FILE %s\n",
2227                  (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context), ESI_reg(context)));
2228           /* translate Dos 7 action to Dos 6 action */
2229             bSetDOSExtendedError = INT21_ExtendedOpenCreateFile(context);
2230             break;
2231
2232         case 0x3b:  /* Change directory */
2233             TRACE("LONG FILENAME - CHANGE DIRECTORY %s\n",
2234                  (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context), EDX_reg(context)));
2235             if (!SetCurrentDirectoryA(CTX_SEG_OFF_TO_LIN(context,
2236                                                 DS_reg(context),
2237                                                 EDX_reg(context)
2238                                         ))
2239             ) {
2240                 SET_CFLAG(context);
2241                 AL_reg(context) = GetLastError();
2242             }
2243             break;
2244         case 0x41:  /* Delete file */
2245             TRACE("LONG FILENAME - DELETE FILE %s\n",
2246                  (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context), EDX_reg(context)));
2247             if (!DeleteFileA(CTX_SEG_OFF_TO_LIN(context,
2248                                         DS_reg(context),
2249                                         EDX_reg(context))
2250             )) {
2251                 SET_CFLAG(context);
2252                 AL_reg(context) = GetLastError();
2253             }
2254             break;
2255         case 0x56:  /* Move (rename) file */
2256             TRACE("LONG FILENAME - RENAME FILE %s to %s stub\n",
2257                   (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  DS_reg(context), EDX_reg(context)),
2258                   (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  ES_reg(context), EDI_reg(context)));
2259         default:
2260             FIXME("Unimplemented long file name function:\n");
2261             INT_BARF( context, 0x21 );
2262             SET_CFLAG(context);
2263             AL_reg(context) = 0;
2264             break;
2265         }
2266         break;
2267
2268     case 0x70: /* MS-DOS 7 (Windows95) - ??? (country-specific?)*/
2269     case 0x72: /* MS-DOS 7 (Windows95) - ??? */
2270     case 0x73: /* MS-DOS 7 (Windows95) - DRIVE LOCKING ??? */
2271         TRACE("windows95 function AX %04x\n",
2272                     AX_reg(context));
2273         WARN("        returning unimplemented\n");
2274         SET_CFLAG(context);
2275         AL_reg(context) = 0;
2276         break;
2277
2278     case 0xdc: /* CONNECTION SERVICES - GET CONNECTION NUMBER */
2279     case 0xea: /* NOVELL NETWARE - RETURN SHELL VERSION */
2280         break;
2281
2282     default:
2283         INT_BARF( context, 0x21 );
2284         break;
2285
2286     } /* END OF SWITCH */
2287
2288     if( bSetDOSExtendedError )          /* set general error condition */
2289     {
2290         AX_reg(context) = GetLastError();
2291         SET_CFLAG(context);
2292     }
2293
2294     if ((EFL_reg(context) & 0x0001))
2295         TRACE("failed, error 0x%04lx\n", GetLastError() );
2296
2297     TRACE("returning: AX=%04x BX=%04x CX=%04x DX=%04x "
2298                  "SI=%04x DI=%04x DS=%04x ES=%04x EFL=%08lx\n",
2299                  AX_reg(context), BX_reg(context), CX_reg(context),
2300                  DX_reg(context), SI_reg(context), DI_reg(context),
2301                  (WORD)DS_reg(context), (WORD)ES_reg(context),
2302                  EFL_reg(context));
2303 }
2304
2305 FARPROC16 WINAPI GetSetKernelDOSProc16(FARPROC16 DosProc)
2306 {
2307         FIXME("(DosProc=0x%08x): stub\n", (UINT)DosProc);
2308         return NULL;
2309 }
2310