/* * (c) 1993, 1994 Erik Bos */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "dos_fs.h" #include "windows.h" #include "msdos.h" #include "registers.h" #include "ldt.h" #include "task.h" #include "options.h" #include "miscemu.h" #include "stddebug.h" #include "debug.h" #ifdef __svr4__ /* SVR4 DOESNTdo locking the same way must implement properly */ #define LOCK_EX 0 #define LOCK_SH 1 #define LOCK_NB 8 #endif /* Define the drive parameter block, as used by int21/1F * and int21/32. This table can be accessed through the * global 'dpb' pointer, which points into the local dos * heap. */ struct DPB { BYTE drive_num; /* 0=A, etc. */ BYTE unit_num; /* Drive's unit number (?) */ WORD sector_size; /* Sector size in bytes */ BYTE high_sector; /* Highest sector in a cluster */ BYTE shift; /* Shift count (?) */ WORD reserved; /* Number of reserved sectors at start */ BYTE num_FAT; /* Number of FATs */ WORD dir_entries; /* Number of root dir entries */ WORD first_data; /* First data sector */ WORD high_cluster; /* Highest cluster number */ WORD sectors_in_FAT; /* Number of sectors per FAT */ WORD start_dir; /* Starting sector of first dir */ DWORD driver_head; /* Address of device driver header (?) */ BYTE media_ID; /* Media ID */ BYTE access_flag; /* Prev. accessed flag (0=yes,0xFF=no) */ DWORD next; /* Pointer to next DPB in list */ WORD free_search; /* Free cluster search start */ WORD free_clusters; /* Number of free clusters (0xFFFF=unknown) */ }; WORD CodePage = 437; struct DPB *dpb; DWORD dpbsegptr; struct DosHeap { BYTE InDosFlag; BYTE mediaID; BYTE biosdate[8]; struct DPB dpb; }; static struct DosHeap *heap; static WORD DosHeapHandle; WORD sharing_retries = 3; /* number of retries at sharing violation */ WORD sharing_pause = 1; /* pause between retries */ extern char TempDirectory[]; static int Error(int e, int class, int el) { return DOS_Error(e,class,el); } BYTE *GetCurrentDTA(void) { TDB *pTask = (TDB *)GlobalLock( GetCurrentTask() ); return (BYTE *)PTR_SEG_TO_LIN( pTask->dta ); } void ChopOffWhiteSpace(char *string) { int length; for (length = strlen(string) ; length ; length--) if (string[length] == ' ') string[length] = '\0'; } static void CreateBPB(int drive, BYTE *data) { if (drive > 1) { setword(data, 512); data[2] = 2; setword(&data[3], 0); data[5] = 2; setword(&data[6], 240); setword(&data[8], 64000); data[0x0a] = 0xf8; setword(&data[0x0b], 40); setword(&data[0x0d], 56); setword(&data[0x0f], 2); setword(&data[0x11], 0); setword(&data[0x1f], 800); data[0x21] = 5; setword(&data[0x22], 1); } else { /* 1.44mb */ setword(data, 512); data[2] = 2; setword(&data[3], 0); data[5] = 2; setword(&data[6], 240); setword(&data[8], 2880); data[0x0a] = 0xf8; setword(&data[0x0b], 6); setword(&data[0x0d], 18); setword(&data[0x0f], 2); setword(&data[0x11], 0); setword(&data[0x1f], 80); data[0x21] = 7; setword(&data[0x22], 2); } } static void GetFreeDiskSpace(struct sigcontext_struct *context) { int drive; long size,available; if (DL_reg(context) == 0) drive = DOS_GetDefaultDrive(); else drive = DL_reg(context) - 1; if (!DOS_ValidDrive(drive)) { Error(InvalidDrive, EC_MediaError , EL_Disk); AX_reg(context) = 0xffff; return; } if (!DOS_GetFreeSpace(drive, &size, &available)) { Error(GeneralFailure, EC_MediaError , EL_Disk); AX_reg(context) = 0xffff; return; } AX_reg(context) = (drive < 2) ? 1 : 64; /* 64 for hard-disks, 1 for diskettes */ CX_reg(context) = 512; BX_reg(context) = (available / (CX_reg(context) * AX_reg(context))); DX_reg(context) = (size / (CX_reg(context) * AX_reg(context))); Error (0,0,0); } static void GetDriveAllocInfo(struct sigcontext_struct *context) { int drive; long size, available; if (DL_reg(context) == 0) drive = DOS_GetDefaultDrive(); else drive = DL_reg(context) - 1; if (!DOS_ValidDrive(drive)) { AX_reg(context) = 4; CX_reg(context) = 512; DX_reg(context) = 0; Error (InvalidDrive, EC_MediaError, EL_Disk); return; } if (!DOS_GetFreeSpace(drive, &size, &available)) { Error(GeneralFailure, EC_MediaError , EL_Disk); AX_reg(context) = 0xffff; return; } AX_reg(context) = (drive < 2) ? 1 : 64; /* 64 for hard-disks, 1 for diskettes */ CX_reg(context) = 512; DX_reg(context) = (size / (CX_reg(context) * AX_reg(context))); heap->mediaID = 0xf0; DS_reg(context) = DosHeapHandle; BX_reg(context) = (int)&heap->mediaID - (int)heap; Error (0,0,0); } static void GetDrivePB(struct sigcontext_struct *context, int drive) { if(!DOS_ValidDrive(drive)) { Error (InvalidDrive, EC_MediaError, EL_Disk); AX_reg(context) = 0x00ff; } else { dprintf_int(stddeb, "int21: GetDrivePB not fully implemented.\n"); /* FIXME: I have no idea what a lot of this information should * say or whether it even really matters since we're not allowing * direct block access. However, some programs seem to depend on * getting at least _something_ back from here. The 'next' pointer * does worry me, though. Should we have a complete table of * separate DPBs per drive? Probably, but I'm lazy. :-) -CH */ dpb->drive_num = dpb->unit_num = drive; /* The same? */ dpb->sector_size = 512; dpb->high_sector = 1; dpb->shift = drive < 2 ? 0 : 6; /* 6 for HD, 0 for floppy */ dpb->reserved = 0; dpb->num_FAT = 1; dpb->dir_entries = 2; dpb->first_data = 2; dpb->high_cluster = 64000; dpb->sectors_in_FAT = 1; dpb->start_dir = 1; dpb->driver_head = 0; dpb->media_ID = (drive > 1) ? 0xF8 : 0xF0; dpb->access_flag = 0; dpb->next = 0; dpb->free_search = 0; dpb->free_clusters = 0xFFFF; /* unknown */ AL_reg(context) = 0x00; DS_reg(context) = SELECTOROF(dpbsegptr); BX_reg(context) = OFFSETOF(dpbsegptr); } } static void ReadFile(struct sigcontext_struct *context) { char *ptr; int size; /* can't read from stdout / stderr */ if ((BX_reg(context) == 1) || (BX_reg(context) == 2)) { Error (InvalidHandle, EL_Unknown, EC_Unknown); AX_reg(context) = InvalidHandle; SET_CFLAG(context); dprintf_int(stddeb, "int21: read (%d, void *, 0x%x) = EBADF\n", BX_reg(context), CX_reg(context)); return; } ptr = PTR_SEG_OFF_TO_LIN (DS_reg(context),DX_reg(context)); if (BX_reg(context) == 0) { *ptr = EOF; Error (0,0,0); AX_reg(context) = 1; RESET_CFLAG(context); dprintf_int(stddeb, "int21: read (%d, void *, 0x%x) = EOF\n", BX_reg(context), CX_reg(context)); return; } else { size = read(BX_reg(context), ptr, CX_reg(context)); dprintf_int(stddeb,"int21: read(%d, %04x:%04x, 0x%x) = 0x%x\n", BX_reg(context), DS_reg(context), DX_reg(context), CX_reg(context), size ); if (size == -1) { errno_to_doserr(); AX_reg(context) = ExtendedError; SET_CFLAG(context); return; } Error (0,0,0); AX_reg(context) = size; RESET_CFLAG(context); } } static void WriteFile(struct sigcontext_struct *context) { char *ptr; int x,size; ptr = PTR_SEG_OFF_TO_LIN (DS_reg(context),DX_reg(context)); if (BX_reg(context) == 0) { Error (InvalidHandle, EC_Unknown, EL_Unknown); EAX_reg(context) = InvalidHandle; SET_CFLAG(context); return; } if (BX_reg(context) < 3) { for (x = 0;x != CX_reg(context);x++) { dprintf_int(stddeb, "%c", *ptr++); } fflush(stddeb); Error (0,0,0); AX_reg(context) = CX_reg(context); RESET_CFLAG(context); } else { /* well, this function already handles everything we need */ size = _lwrite(BX_reg(context),ptr,CX_reg(context)); if (size == -1) { /* HFILE_ERROR == -1 */ errno_to_doserr(); AX_reg(context) = ExtendedError; SET_CFLAG(context); return; } Error (0,0,0); AX_reg(context) = size; RESET_CFLAG(context); } } static void SeekFile(struct sigcontext_struct *context) { off_t status, fileoffset; switch (AL_reg(context)) { case 1: fileoffset = SEEK_CUR; break; case 2: fileoffset = SEEK_END; break; default: case 0: fileoffset = SEEK_SET; break; } status = lseek(BX_reg(context), (CX_reg(context) << 16) + DX_reg(context), fileoffset); dprintf_int (stddeb, "int21: seek (%d, 0x%x, %d) = 0x%lx\n", BX_reg(context), (CX_reg(context) << 16) + DX_reg(context), AL_reg(context), status); if (status == -1) { errno_to_doserr(); AX_reg(context) = ExtendedError; SET_CFLAG(context); return; } Error (0,0,0); AX_reg(context) = LOWORD(status); DX_reg(context) = HIWORD(status); RESET_CFLAG(context); } static void ioctlGetDeviceInfo(struct sigcontext_struct *context) { dprintf_int (stddeb, "int21: ioctl (%d, GetDeviceInfo)\n", BX_reg(context)); switch (BX_reg(context)) { case 0: case 1: case 2: DX_reg(context) = 0x80d0 | (1 << (BX_reg(context) != 0)); RESET_CFLAG(context); break; default: { struct stat sbuf; if (fstat(BX_reg(context), &sbuf) < 0) { INT_BARF( context, 0x21 ); SET_CFLAG(context); return; } DX_reg(context) = 0x0943; /* bits 0-5 are current drive * bit 6 - file has NOT been written..FIXME: correct? * bit 8 - generate int24 if no diskspace on write/ read past end of file * bit 11 - media not removable */ } } RESET_CFLAG(context); } static void ioctlGenericBlkDevReq(struct sigcontext_struct *context) { BYTE *dataptr = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context)); int drive; if (BL_reg(context) == 0) drive = DOS_GetDefaultDrive(); else drive = BL_reg(context) - 1; if (!DOS_ValidDrive(drive)) { Error( FileNotFound, EC_NotFound, EL_Disk ); AX_reg(context) = FileNotFound; SET_CFLAG(context); return; } if (CH_reg(context) != 0x08) { INT_BARF( context, 0x21 ); return; } switch (CL_reg(context)) { case 0x60: /* get device parameters */ /* used by w4wgrp's winfile */ memset(dataptr, 0, 0x26); dataptr[0] = 0x04; dataptr[6] = 0; /* media type */ if (drive > 1) { dataptr[1] = 0x05; /* fixed disk */ setword(&dataptr[2], 0x01); /* non removable */ setword(&dataptr[4], 0x300); /* # of cylinders */ } else { dataptr[1] = 0x07; /* block dev, floppy */ setword(&dataptr[2], 0x02); /* removable */ setword(&dataptr[4], 80); /* # of cylinders */ } CreateBPB(drive, &dataptr[7]); RESET_CFLAG(context); return; default: INT_BARF( context, 0x21 ); } } static void GetSystemDate(struct sigcontext_struct *context) { struct tm *now; time_t ltime; ltime = time(NULL); now = localtime(<ime); CX_reg(context) = now->tm_year + 1900; DX_reg(context) = ((now->tm_mon + 1) << 8) | now->tm_mday; AX_reg(context) = now->tm_wday; } static void GetSystemTime(struct sigcontext_struct *context) { struct tm *now; struct timeval tv; time_t seconds; gettimeofday(&tv,NULL); /* Note use of gettimeofday(), instead of time() */ seconds = tv.tv_sec; now = localtime(&seconds); CX_reg(context) = (now->tm_hour<<8) | now->tm_min; DX_reg(context) = (now->tm_sec<<8) | tv.tv_usec/10000; /* Note hundredths of seconds */ } static void GetExtendedErrorInfo(struct sigcontext_struct *context) { AX_reg(context) = ExtendedError; BX_reg(context) = (ErrorClass << 8) | Action; CH_reg(context) = ErrorLocus; } static void CreateFile(struct sigcontext_struct *context) { int handle; handle = open(DOS_GetUnixFileName( PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context))), O_CREAT | O_TRUNC | O_RDWR, 0666 ); if (handle == -1) { errno_to_doserr(); AX_reg(context) = ExtendedError; SET_CFLAG(context); return; } Error (0,0,0); AX_reg(context) = handle; RESET_CFLAG(context); } void OpenExistingFile(struct sigcontext_struct *context) { int handle; int mode; int lock; switch (AX_reg(context) & 0x0007) { case 0: mode = O_RDONLY; break; case 1: mode = O_WRONLY; break; default: mode = O_RDWR; break; } if ((handle = open(DOS_GetUnixFileName(PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context))), mode)) == -1) { if( Options.allowReadOnly ) handle = open( DOS_GetUnixFileName(PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context))), O_RDONLY ); if( handle == -1 ) { dprintf_int (stddeb, "int21: open (%s, %d) = -1\n", DOS_GetUnixFileName(PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context))), mode); errno_to_doserr(); AX_reg(context) = ExtendedError; SET_CFLAG(context); return; } } dprintf_int (stddeb, "int21: open (%s, %d) = %d\n", DOS_GetUnixFileName(PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context))), mode, handle); switch (AX_reg(context) & 0x0070) { case 0x00: /* compatability mode */ case 0x40: /* DENYNONE */ lock = -1; break; case 0x30: /* DENYREAD */ dprintf_int(stddeb, "OpenExistingFile (%s): DENYREAD changed to DENYALL\n", (char *)PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context))); case 0x10: /* DENYALL */ lock = LOCK_EX; break; case 0x20: /* DENYWRITE */ lock = LOCK_SH; break; default: lock = -1; } if (lock != -1) { int result,retries=sharing_retries; { #ifdef __svr4__ printf("Should call flock and needs porting to lockf\n"); #else result = flock(handle, lock | LOCK_NB); #endif if ( retries && (!result) ) { int i; for(i=0;i<32768*((int)sharing_pause);i++) result++; /* stop the optimizer */ for(i=0;i<32768*((int)sharing_pause);i++) result--; } } while( (!result) && (!(retries--)) ); if(result) { errno_to_doserr(); AX_reg(context) = ExtendedError; close(handle); SET_CFLAG(context); return; } } Error (0,0,0); AX_reg(context) = handle; RESET_CFLAG(context); } static void CloseFile(struct sigcontext_struct *context) { dprintf_int (stddeb, "int21: close (%d)\n", BX_reg(context)); if (_lclose( BX_reg(context) )) { errno_to_doserr(); AX_reg(context) = ExtendedError; SET_CFLAG(context); return; } Error (0,0,0); AX_reg(context) = NoError; RESET_CFLAG(context); } static void RenameFile(struct sigcontext_struct *context) { char *newname, *oldname; /* FIXME: should not rename over an existing file */ dprintf_int(stddeb,"int21: renaming %s to %s\n", (char *)PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)), (char *)PTR_SEG_OFF_TO_LIN(ES_reg(context),DI_reg(context))); oldname = DOS_GetUnixFileName( PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context)) ); newname = DOS_GetUnixFileName( PTR_SEG_OFF_TO_LIN(ES_reg(context), DI_reg(context)) ); rename( oldname, newname); RESET_CFLAG(context); } static void MakeDir(struct sigcontext_struct *context) { char *dirname; dprintf_int(stddeb,"int21: makedir %s\n", (char *)PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)) ); if ((dirname = DOS_GetUnixFileName( PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context)) ))== NULL) { Error( CanNotMakeDir, EC_AccessDenied, EL_Disk ); AX_reg(context) = CanNotMakeDir; SET_CFLAG(context); return; } if ((mkdir(dirname,0) == -1) && errno!=EEXIST) { Error( CanNotMakeDir, EC_AccessDenied, EL_Disk ); AX_reg(context) = CanNotMakeDir; SET_CFLAG(context); return; } RESET_CFLAG(context); } static void ChangeDir(struct sigcontext_struct *context) { int drive; char *dirname = PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)); drive = DOS_GetDefaultDrive(); dprintf_int(stddeb,"int21: changedir %s\n", dirname); if (dirname != NULL && dirname[1] == ':') { drive = toupper(dirname[0]) - 'A'; dirname += 2; } if (!DOS_ChangeDir(drive, dirname)) { SET_CFLAG(context); AX_reg(context)=0x03; } } static void RemoveDir(struct sigcontext_struct *context) { char *dirname; dprintf_int(stddeb,"int21: removedir %s\n", (char *)PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)) ); if ((dirname = DOS_GetUnixFileName( PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)) ))== NULL) { Error( PathNotFound, EC_NotFound, EL_Disk ); AX_reg(context) = PathNotFound; SET_CFLAG(context); return; } /* if (strcmp(unixname,DosDrives[drive].CurrentDirectory)) { AL = CanNotRemoveCwd; SET_CFLAG(context); } */ if (rmdir(dirname) == -1) { Error( AccessDenied, EC_AccessDenied, EL_Disk ); AX_reg(context) = AccessDenied; SET_CFLAG(context); return; } RESET_CFLAG(context); } static void FindNext(struct sigcontext_struct *context) { struct dosdirent *dp; struct tm *t; BYTE *dta = GetCurrentDTA(); memcpy(&dp, dta+0x11, sizeof(dp)); dprintf_int(stddeb, "int21: FindNext, dta %p, dp %p\n", dta, dp); do { if ((dp = DOS_readdir(dp)) == NULL) { Error(NoMoreFiles, EC_MediaError , EL_Disk); AX_reg(context) = NoMoreFiles; SET_CFLAG(context); return; } } /* while (*(dta + 0x0c) != dp->attribute);*/ while ( ( dp->search_attribute & dp->attribute) != dp->attribute); *(dta + 0x15) = dp->attribute; setword(&dta[0x0d], dp->entnum); t = localtime(&(dp->filetime)); setword(&dta[0x16], (t->tm_hour << 11) + (t->tm_min << 5) + (t->tm_sec / 2)); /* time */ setword(&dta[0x18], ((t->tm_year - 80) << 9) + (t->tm_mon << 5) + (t->tm_mday)); /* date */ setdword(&dta[0x1a], dp->filesize); strncpy(dta + 0x1e, dp->filename, 13); AX_reg(context) = 0; RESET_CFLAG(context); dprintf_int(stddeb, "int21: FindNext -- (%s) index=%d size=%ld\n", dp->filename, dp->entnum, dp->filesize); return; } static void FindFirst(struct sigcontext_struct *context) { BYTE drive, *path = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context)); struct dosdirent *dp; BYTE *dta = GetCurrentDTA(); dprintf_int(stddeb, "int21: FindFirst path = %s\n", path); if ((*path)&&(path[1] == ':')) { drive = (islower(*path) ? toupper(*path) : *path) - 'A'; if (!DOS_ValidDrive(drive)) { Error(InvalidDrive, EC_MediaError , EL_Disk); AX_reg(context) = InvalidDrive; SET_CFLAG(context); return; } } else drive = DOS_GetDefaultDrive(); *dta = drive; memset(dta + 1 , '?', 11); *(dta + 0x0c) = ECX_reg(context) & (FA_LABEL | FA_DIREC); if ((dp = DOS_opendir(path)) == NULL) { Error(PathNotFound, EC_MediaError, EL_Disk); AX_reg(context) = FileNotFound; SET_CFLAG(context); return; } dp->search_attribute = ECX_reg(context) & (FA_LABEL | FA_DIREC); memcpy(dta + 0x11, &dp, sizeof(dp)); FindNext(context); } static void GetFileDateTime(struct sigcontext_struct *context) { struct stat filestat; struct tm *now; fstat( BX_reg(context), &filestat ); now = localtime (&filestat.st_mtime); CX_reg(context) = ((now->tm_hour * 0x2000) + (now->tm_min * 0x20) + now->tm_sec/2); DX_reg(context) = (((now->tm_year + 1900 - 1980) * 0x200) + (now->tm_mon * 0x20) + now->tm_mday); RESET_CFLAG(context); } static void SetFileDateTime(struct sigcontext_struct *context) { char *filename; struct utimbuf filetime; /* FIXME: Argument isn't the name of the file in DS:DX, but the file handle in BX */ filename = DOS_GetUnixFileName( PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context)) ); filetime.actime = 0L; filetime.modtime = filetime.actime; utime(filename, &filetime); RESET_CFLAG(context); } static void CreateTempFile(struct sigcontext_struct *context) { char temp[256]; int handle; static int counter = 0; sprintf(temp,"%s\\win%d.%03d",TempDirectory,(int) getpid(), counter); counter = (counter + 1) % 1000; dprintf_int(stddeb,"CreateTempFile %s\n",temp); handle = open(DOS_GetUnixFileName(temp), O_CREAT | O_TRUNC | O_RDWR, 0666); if (handle == -1) { Error( WriteProtected, EC_AccessDenied, EL_Disk ); AX_reg(context) = WriteProtected; SET_CFLAG(context); return; } strcpy(PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)), temp); AX_reg(context) = handle; RESET_CFLAG(context); } static void CreateNewFile(struct sigcontext_struct *context) { int handle; if ((handle = open(DOS_GetUnixFileName( PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)) ), O_CREAT | O_EXCL | O_RDWR, 0666)) == -1) { Error( WriteProtected, EC_AccessDenied, EL_Disk ); AX_reg(context) = WriteProtected; SET_CFLAG(context); return; } AX_reg(context) = handle; RESET_CFLAG(context); } static void GetCurrentDirectory(struct sigcontext_struct *context) { int drive; if (DL_reg(context) == 0) drive = DOS_GetDefaultDrive(); else drive = DL_reg(context) - 1; if (!DOS_ValidDrive(drive)) { Error( InvalidDrive, EC_NotFound, EL_Disk ); AX_reg(context) = InvalidDrive; SET_CFLAG(context); return; } strcpy(PTR_SEG_OFF_TO_LIN(DS_reg(context),SI_reg(context)), DOS_GetCurrentDir(drive) ); RESET_CFLAG(context); } static void GetDiskSerialNumber(struct sigcontext_struct *context) { int drive; BYTE *dataptr = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context)); DWORD serialnumber; if (BL_reg(context) == 0) drive = DOS_GetDefaultDrive(); else drive = BL_reg(context) - 1; if (!DOS_ValidDrive(drive)) { Error( InvalidDrive, EC_NotFound, EL_Disk ); AX_reg(context) = InvalidDrive; SET_CFLAG(context); return; } DOS_GetSerialNumber(drive, &serialnumber); setword(dataptr, 0); setdword(&dataptr[2], serialnumber); strncpy(dataptr + 6, DOS_GetVolumeLabel(drive), 8); strncpy(dataptr + 0x11, "FAT16 ", 8); AX_reg(context) = 0; RESET_CFLAG(context); } static void SetDiskSerialNumber(struct sigcontext_struct *context) { int drive; BYTE *dataptr = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context)); DWORD serialnumber; if (BL_reg(context) == 0) drive = DOS_GetDefaultDrive(); else drive = BL_reg(context) - 1; if (!DOS_ValidDrive(drive)) { Error( InvalidDrive, EC_NotFound, EL_Disk ); AX_reg(context) = InvalidDrive; SET_CFLAG(context); return; } serialnumber = dataptr[1] + (dataptr[2] << 8) + (dataptr[3] << 16) + (dataptr[4] << 24); DOS_SetSerialNumber(drive, serialnumber); AX_reg(context) = 1; RESET_CFLAG(context); } static void DumpFCB(BYTE *fcb) { int x, y; fcb -= 7; for (y = 0; y !=2 ; y++) { for (x = 0; x!=15;x++) dprintf_int(stddeb, "%02x ", *fcb++); dprintf_int(stddeb,"\n"); } } /* microsoft's programmers should be shot for using CP/M style int21 calls in Windows for Workgroup's winfile.exe */ static void FindFirstFCB(struct sigcontext_struct *context) { BYTE *fcb = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context)); struct fcb *standard_fcb; struct fcb *output_fcb; int drive; char path[12]; BYTE *dta = GetCurrentDTA(); DumpFCB( fcb ); if ((*fcb) == 0xff) { standard_fcb = (struct fcb *)(fcb + 7); output_fcb = (struct fcb *)(dta + 7); *dta = 0xff; } else { standard_fcb = (struct fcb *)fcb; output_fcb = (struct fcb *)dta; } if (standard_fcb->drive) { drive = standard_fcb->drive - 1; if (!DOS_ValidDrive(drive)) { Error (InvalidDrive, EC_MediaError, EL_Disk); AX_reg(context) = 0xff; return; } } else drive = DOS_GetDefaultDrive(); output_fcb->drive = drive; if (*(fcb) == 0xff) { if (*(fcb+6) & FA_LABEL) /* return volume label */ { *(dta+6) = FA_LABEL; memset(&output_fcb->name, ' ', 11); if (DOS_GetVolumeLabel(drive) != NULL) { strncpy(output_fcb->name, DOS_GetVolumeLabel(drive), 11); AX_reg(context) = 0x00; return; } } } strncpy(output_fcb->name, standard_fcb->name, 11); if (*fcb == 0xff) *(dta+6) = ( *(fcb+6) & (!FA_DIREC)); sprintf(path,"%c:*.*",drive+'A'); if ((output_fcb->directory = DOS_opendir(path))==NULL) { Error (PathNotFound, EC_MediaError, EL_Disk); AX_reg(context) = 0xff; return; } } static void DeleteFileFCB(struct sigcontext_struct *context) { BYTE *fcb = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context)); int drive; struct dosdirent *dp; char temp[256], *ptr; DumpFCB( fcb ); if (*fcb) drive = *fcb - 1; else drive = DOS_GetDefaultDrive(); strcpy(temp, DOS_GetCurrentDir(drive)); strcat(temp, "\\"); strncat(temp, fcb + 1, 8); ChopOffWhiteSpace(temp); strncat(temp, fcb + 9, 3); ChopOffWhiteSpace(temp); if ((dp = DOS_opendir(temp)) == NULL) { Error(InvalidDrive, EC_MediaError , EL_Disk); AX_reg(context) = 0xff; return; } strcpy(temp, DOS_GetCurrentDir(drive) ); strcat(temp, "\\"); ptr = temp + strlen(temp); while (DOS_readdir(dp) != NULL) { strcpy(ptr, dp->filename); dprintf_int(stddeb, "int21: delete file %s\n", temp); /* unlink(DOS_GetUnixFileName(temp)); */ } DOS_closedir(dp); AX_reg(context) = 0; } static void RenameFileFCB(struct sigcontext_struct *context) { BYTE *fcb = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context)); int drive; struct dosdirent *dp; char temp[256], oldname[256], newname[256], *oldnameptr, *newnameptr; DumpFCB( fcb ); if (*fcb) drive = *fcb - 1; else drive = DOS_GetDefaultDrive(); strcpy(temp, DOS_GetCurrentDir(drive)); strcat(temp, "\\"); strncat(temp, fcb + 1, 8); ChopOffWhiteSpace(temp); strncat(temp, fcb + 9, 3); ChopOffWhiteSpace(temp); if ((dp = DOS_opendir(temp)) == NULL) { Error(InvalidDrive, EC_MediaError , EL_Disk); AX_reg(context) = 0xff; return; } strcpy(oldname, DOS_GetCurrentDir(drive) ); strcat(oldname, "\\"); oldnameptr = oldname + strlen(oldname); strcpy(newname, DOS_GetCurrentDir(drive) ); strcat(newname, "\\"); newnameptr = newname + strlen(newname); while (DOS_readdir(dp) != NULL) { strcpy(oldnameptr, dp->filename); strcpy(newnameptr, fcb + 1); dprintf_int(stddeb, "int21: renamefile %s -> %s\n", oldname, newname); } DOS_closedir(dp); AX_reg(context) = 0; } static void fLock (struct sigcontext_struct * context) { struct flock f; int result,retries=sharing_retries; f.l_start = MAKELONG(DX_reg(context),CX_reg(context)); f.l_len = MAKELONG(DI_reg(context),SI_reg(context)); f.l_whence = 0; f.l_pid = 0; switch ( AX_reg(context) & 0xff ) { case 0x00: /* LOCK */ f.l_type = F_WRLCK; break; case 0x01: /* UNLOCK */ f.l_type = F_UNLCK; break; default: AX_reg(context) = 0x0001; SET_CFLAG(context); return; } { result = fcntl(BX_reg(context),F_SETLK,&f); if ( retries && (!result) ) { int i; for(i=0;i<32768*((int)sharing_pause);i++) result++; /* stop the optimizer */ for(i=0;i<32768*((int)sharing_pause);i++) result--; } } while( (!result) && (!(retries--)) ); if(result) { errno_to_doserr(); AX_reg(context) = ExtendedError; SET_CFLAG(context); return; } Error (0,0,0); RESET_CFLAG(context); } static void GetFileAttribute (struct sigcontext_struct * context) { char *filename = PTR_SEG_OFF_TO_LIN (DS_reg(context),DX_reg(context)); struct stat s; int res; res = stat(DOS_GetUnixFileName(filename), &s); if (res==-1) { errno_to_doserr(); AX_reg(context) = ExtendedError; SET_CFLAG(context); return; } CX_reg(context) = 0; if (S_ISDIR(s.st_mode)) CX_reg(context) |= 0x10; if ((S_IWRITE & s.st_mode) != S_IWRITE) CX_reg(context) |= 0x01; dprintf_int (stddeb, "int21: GetFileAttributes (%s) = 0x%x\n", filename, CX_reg(context) ); RESET_CFLAG(context); Error (0,0,0); } extern void LOCAL_PrintHeap (WORD ds); /*********************************************************************** * DOS3Call (KERNEL.102) */ void DOS3Call( struct sigcontext_struct context ) { int drive; if (AH_reg(&context) == 0x59) { GetExtendedErrorInfo(&context); return; } else { Error (0,0,0); switch(AH_reg(&context)) { case 0x00: /* TERMINATE PROGRAM */ TASK_KillCurrentTask( 0 ); break; case 0x01: /* READ CHARACTER FROM STANDARD INPUT, WITH ECHO */ case 0x02: /* WRITE CHARACTER TO STANDARD OUTPUT */ case 0x03: /* READ CHARACTER FROM STDAUX */ case 0x04: /* WRITE CHARACTER TO STDAUX */ case 0x05: /* WRITE CHARACTER TO PRINTER */ case 0x06: /* DIRECT CONSOLE IN/OUTPUT */ case 0x07: /* DIRECT CHARACTER INPUT, WITHOUT ECHO */ case 0x08: /* CHARACTER INPUT WITHOUT ECHO */ case 0x09: /* WRITE STRING TO STANDARD OUTPUT */ case 0x0a: /* BUFFERED INPUT */ case 0x0b: /* GET STDIN STATUS */ case 0x0c: /* FLUSH BUFFER AND READ STANDARD INPUT */ case 0x0f: /* OPEN FILE USING FCB */ case 0x10: /* CLOSE FILE USING FCB */ case 0x12: /* FIND NEXT MATCHING FILE USING FCB */ case 0x14: /* SEQUENTIAL READ FROM FCB FILE */ case 0x15: /* SEQUENTIAL WRITE TO FCB FILE */ case 0x16: /* CREATE OR TRUNCATE FILE USING FCB */ case 0x21: /* READ RANDOM RECORD FROM FCB FILE */ case 0x22: /* WRITE RANDOM RECORD TO FCB FILE */ case 0x23: /* GET FILE SIZE FOR FCB */ case 0x24: /* SET RANDOM RECORD NUMBER FOR FCB */ case 0x26: /* CREATE NEW PROGRAM SEGMENT PREFIX */ case 0x27: /* RANDOM BLOCK READ FROM FCB FILE */ case 0x28: /* RANDOM BLOCK WRITE TO FCB FILE */ case 0x29: /* PARSE FILENAME INTO FCB */ case 0x2e: /* SET VERIFY FLAG */ INT_BARF( &context, 0x21 ); break; case 0x37: /* "SWITCHAR" - GET SWITCH CHARACTER "SWITCHAR" - SET SWITCH CHARACTER "AVAILDEV" - SPECIFY \DEV\ PREFIX USE */ case 0x54: /* GET VERIFY FLAG */ INT_BARF( &context, 0x21 ); break; case 0x18: /* NULL FUNCTIONS FOR CP/M COMPATIBILITY */ case 0x1d: case 0x1e: case 0x20: case 0x6b: /* NULL FUNCTION */ AL_reg(&context) = 0; break; case 0x5c: /* "FLOCK" - RECORD LOCKING */ fLock(&context); break; case 0x0d: /* DISK BUFFER FLUSH */ RESET_CFLAG(&context); /* dos 6+ only */ break; case 0x0e: /* SELECT DEFAULT DRIVE */ if (!DOS_ValidDrive(DL_reg(&context))) Error (InvalidDrive, EC_MediaError, EL_Disk); else { DOS_SetDefaultDrive(DL_reg(&context)); Error(0,0,0); } AL_reg(&context) = MAX_DOS_DRIVES; break; case 0x11: /* FIND FIRST MATCHING FILE USING FCB */ FindFirstFCB(&context); break; case 0x13: /* DELETE FILE USING FCB */ DeleteFileFCB(&context); break; case 0x17: /* RENAME FILE USING FCB */ RenameFileFCB(&context); break; case 0x19: /* GET CURRENT DEFAULT DRIVE */ AL_reg(&context) = DOS_GetDefaultDrive(); Error (0,0,0); break; case 0x1a: /* SET DISK TRANSFER AREA ADDRESS */ { TDB *pTask = (TDB *)GlobalLock( GetCurrentTask() ); pTask->dta = MAKELONG( DX_reg(&context), DS_reg(&context) ); dprintf_int(stddeb, "int21: Set DTA: %08lx\n", pTask->dta); } break; case 0x1b: /* GET ALLOCATION INFORMATION FOR DEFAULT DRIVE */ DL_reg(&context) = 0; GetDriveAllocInfo(&context); break; case 0x1c: /* GET ALLOCATION INFORMATION FOR SPECIFIC DRIVE */ GetDriveAllocInfo(&context); break; case 0x1f: /* GET DRIVE PARAMETER BLOCK FOR DEFAULT DRIVE */ GetDrivePB(&context, DOS_GetDefaultDrive()); break; case 0x25: /* SET INTERRUPT VECTOR */ INT_SetHandler( AL_reg(&context), MAKELONG( DX_reg(&context), DS_reg(&context) ) ); break; case 0x2a: /* GET SYSTEM DATE */ GetSystemDate(&context); break; case 0x2b: /* SET SYSTEM DATE */ fprintf( stdnimp, "SetSystemDate(%02d/%02d/%04d): not allowed\n", DL_reg(&context), DH_reg(&context), CX_reg(&context) ); AL_reg(&context) = 0; /* Let's pretend we succeeded */ break; case 0x2c: /* GET SYSTEM TIME */ GetSystemTime(&context); break; case 0x2d: /* SET SYSTEM TIME */ fprintf( stdnimp, "SetSystemTime(%02d:%02d:%02d.%02d): not allowed\n", CH_reg(&context), CL_reg(&context), DH_reg(&context), DL_reg(&context) ); AL_reg(&context) = 0; /* Let's pretend we succeeded */ break; case 0x2f: /* GET DISK TRANSFER AREA ADDRESS */ { TDB *pTask = (TDB *)GlobalLock( GetCurrentTask() ); ES_reg(&context) = SELECTOROF( pTask->dta ); BX_reg(&context) = OFFSETOF( pTask->dta ); } break; case 0x30: /* GET DOS VERSION */ AX_reg(&context) = DOSVERSION; BX_reg(&context) = 0x0012; /* 0x123456 is Wine's serial # */ CX_reg(&context) = 0x3456; break; case 0x31: /* TERMINATE AND STAY RESIDENT */ INT_BARF( &context, 0x21 ); break; case 0x32: /* GET DOS DRIVE PARAMETER BLOCK FOR SPECIFIC DRIVE */ GetDrivePB(&context, (DL_reg(&context) == 0) ? (DOS_GetDefaultDrive()) : (DL_reg(&context)-1)); break; case 0x33: /* MULTIPLEXED */ switch (AL_reg(&context)) { case 0x00: /* GET CURRENT EXTENDED BREAK STATE */ DL_reg(&context) = 0; break; case 0x01: /* SET EXTENDED BREAK STATE */ break; case 0x02: /* GET AND SET EXTENDED CONTROL-BREAK CHECKING STATE*/ DL_reg(&context) = 0; break; case 0x05: /* GET BOOT DRIVE */ DL_reg(&context) = 2; /* c: is Wine's bootdrive */ break; case 0x06: /* GET TRUE VERSION NUMBER */ BX_reg(&context) = DOSVERSION; DX_reg(&context) = 0x00; break; default: INT_BARF( &context, 0x21 ); break; } break; case 0x34: /* GET ADDRESS OF INDOS FLAG */ ES_reg(&context) = DosHeapHandle; BX_reg(&context) = (int)&heap->InDosFlag - (int)heap; break; case 0x35: /* GET INTERRUPT VECTOR */ { SEGPTR addr = INT_GetHandler( AL_reg(&context) ); ES_reg(&context) = SELECTOROF(addr); BX_reg(&context) = OFFSETOF(addr); } break; case 0x36: /* GET FREE DISK SPACE */ GetFreeDiskSpace(&context); break; case 0x38: /* GET COUNTRY-SPECIFIC INFORMATION */ AX_reg(&context) = 0x02; /* no country support available */ SET_CFLAG(&context); break; case 0x39: /* "MKDIR" - CREATE SUBDIRECTORY */ MakeDir(&context); break; case 0x3a: /* "RMDIR" - REMOVE SUBDIRECTORY */ RemoveDir(&context); break; case 0x3b: /* "CHDIR" - SET CURRENT DIRECTORY */ ChangeDir(&context); break; case 0x3c: /* "CREAT" - CREATE OR TRUNCATE FILE */ CreateFile(&context); break; case 0x3d: /* "OPEN" - OPEN EXISTING FILE */ OpenExistingFile(&context); break; case 0x3e: /* "CLOSE" - CLOSE FILE */ CloseFile(&context); break; case 0x3f: /* "READ" - READ FROM FILE OR DEVICE */ ReadFile(&context); break; case 0x40: /* "WRITE" - WRITE TO FILE OR DEVICE */ WriteFile(&context); break; case 0x41: /* "UNLINK" - DELETE FILE */ if (unlink( DOS_GetUnixFileName( PTR_SEG_OFF_TO_LIN(DS_reg(&context),DX_reg(&context))) ) == -1) { errno_to_doserr(); AX_reg(&context) = ExtendedError; SET_CFLAG(&context); break; } Error(0,0,0); RESET_CFLAG(&context); break; case 0x42: /* "LSEEK" - SET CURRENT FILE POSITION */ SeekFile(&context); break; case 0x43: /* FILE ATTRIBUTES */ switch (AL_reg(&context)) { case 0x00: GetFileAttribute(&context); break; case 0x01: RESET_CFLAG(&context); break; } break; case 0x44: /* IOCTL */ switch (AL_reg(&context)) { case 0x00: ioctlGetDeviceInfo(&context); break; case 0x08: /* Check if drive is removable. */ drive = BL_reg(&context) ? (BL_reg(&context) - 1) : DOS_GetDefaultDrive(); if(!DOS_ValidDrive(drive)) { Error( InvalidDrive, EC_NotFound, EL_Disk ); AX_reg(&context) = InvalidDrive; SET_CFLAG(&context); } else { if (drive > 1) AX_reg(&context) = 1; /* not removable */ else AX_reg(&context) = 0; /* removable */ RESET_CFLAG(&context); } break; case 0x09: /* CHECK IF BLOCK DEVICE REMOTE */ drive = BL_reg(&context) ? (BL_reg(&context) - 1) : DOS_GetDefaultDrive(); if(!DOS_ValidDrive(drive)) { Error( InvalidDrive, EC_NotFound, EL_Disk ); AX_reg(&context) = InvalidDrive; SET_CFLAG(&context); } else { DX_reg(&context) = (1<<9) | (1<<12) | (1<<15); RESET_CFLAG(&context); } break; case 0x0a: /* check if handle (BX) is remote */ /* returns DX, bit 15 set if remote, bit 14 set if date/time * not set on close */ DX_reg(&context) = 0; RESET_CFLAG(&context); break; case 0x0b: /* SET SHARING RETRY COUNT */ if (!CX_reg(&context)) { AX_reg(&context) = 1; SET_CFLAG(&context); break; } sharing_pause = CX_reg(&context); if (!DX_reg(&context)) sharing_retries = DX_reg(&context); RESET_CFLAG(&context); break; case 0x0d: ioctlGenericBlkDevReq(&context); break; case 0x0F: /* Set logical drive mapping */ /* FIXME: Not implemented at the moment, always returns error */ fprintf(stdnimp,"Attempt to map drive %02x\n",BL_reg(&context)); AX_reg(&context) = 0x0001; /* invalid function */ SET_CFLAG(&context); break; default: INT_BARF( &context, 0x21 ); break; } break; case 0x45: /* "DUP" - DUPLICATE FILE HANDLE */ if ((AX_reg(&context) = dup(BX_reg(&context))) == 0xffff) { errno_to_doserr(); AX_reg(&context) = ExtendedError; SET_CFLAG(&context); } else RESET_CFLAG(&context); break; case 0x46: /* "DUP2", "FORCEDUP" - FORCE DUPLICATE FILE HANDLE */ if (dup2( BX_reg(&context), CX_reg(&context) ) == -1) { errno_to_doserr(); AX_reg(&context) = ExtendedError; SET_CFLAG(&context); } else RESET_CFLAG(&context); break; case 0x47: /* "CWD" - GET CURRENT DIRECTORY */ GetCurrentDirectory(&context); AX_reg(&context) = 0x0100; /* intlist: many Microsoft products for Windows rely on this */ break; case 0x48: /* ALLOCATE MEMORY */ case 0x49: /* FREE MEMORY */ case 0x4a: /* RESIZE MEMORY BLOCK */ INT_BARF( &context, 0x21 ); break; case 0x4b: /* "EXEC" - LOAD AND/OR EXECUTE PROGRAM */ WinExec( PTR_SEG_OFF_TO_LIN(DS_reg(&context),DX_reg(&context)), SW_NORMAL ); break; case 0x4c: /* "EXIT" - TERMINATE WITH RETURN CODE */ TASK_KillCurrentTask( AL_reg(&context) ); break; case 0x4d: /* GET RETURN CODE */ AX_reg(&context) = NoError; /* normal exit */ break; case 0x4e: /* "FINDFIRST" - FIND FIRST MATCHING FILE */ FindFirst(&context); break; case 0x4f: /* "FINDNEXT" - FIND NEXT MATCHING FILE */ FindNext(&context); break; case 0x51: /* GET PSP ADDRESS */ case 0x62: /* GET PSP ADDRESS */ /* FIXME: should we return the original DOS PSP upon */ /* Windows startup ? */ BX_reg(&context) = GetCurrentPDB(); break; case 0x52: /* "SYSVARS" - GET LIST OF LISTS */ ES_reg(&context) = 0x0; BX_reg(&context) = 0x0; INT_BARF( &context, 0x21 ); break; case 0x56: /* "RENAME" - RENAME FILE */ RenameFile(&context); break; case 0x57: /* FILE DATE AND TIME */ switch (AL_reg(&context)) { case 0x00: GetFileDateTime(&context); break; case 0x01: SetFileDateTime(&context); break; } break; case 0x58: /* GET OR SET MEMORY/UMB ALLOCATION STRATEGY */ switch (AL_reg(&context)) { case 0x00: AX_reg(&context) = 1; break; case 0x02: AX_reg(&context) = 0; break; case 0x01: case 0x03: break; } RESET_CFLAG(&context); break; case 0x5a: /* CREATE TEMPORARY FILE */ CreateTempFile(&context); break; case 0x5b: /* CREATE NEW FILE */ CreateNewFile(&context); break; case 0x5d: /* NETWORK */ case 0x5e: /* network software not installed */ AX_reg(&context) = NoNetwork; SET_CFLAG(&context); break; case 0x5f: /* NETWORK */ switch (AL_reg(&context)) { case 0x07: /* ENABLE DRIVE */ if (!DOS_EnableDrive(DL_reg(&context))) { Error(InvalidDrive, EC_MediaError , EL_Disk); AX_reg(&context) = InvalidDrive; SET_CFLAG(&context); break; } else { RESET_CFLAG(&context); break; } case 0x08: /* DISABLE DRIVE */ if (!DOS_DisableDrive(DL_reg(&context))) { Error(InvalidDrive, EC_MediaError , EL_Disk); AX_reg(&context) = InvalidDrive; SET_CFLAG(&context); break; } else { RESET_CFLAG(&context); break; } default: /* network software not installed */ AX_reg(&context) = NoNetwork; SET_CFLAG(&context); break; } break; case 0x60: /* "TRUENAME" - CANONICALIZE FILENAME OR PATH */ strncpy(PTR_SEG_OFF_TO_LIN(ES_reg(&context),DI_reg(&context)), PTR_SEG_OFF_TO_LIN(DS_reg(&context),SI_reg(&context)), strlen(PTR_SEG_OFF_TO_LIN(DS_reg(&context),SI_reg(&context))) & 0x7f); RESET_CFLAG(&context); break; case 0x61: /* UNUSED */ case 0x63: /* UNUSED */ case 0x64: /* OS/2 DOS BOX */ case 0x65: /* GET EXTENDED COUNTRY INFORMATION */ INT_BARF( &context, 0x21 ); break; case 0x66: /* GLOBAL CODE PAGE TABLE */ switch (AL_reg(&context)) { case 0x01: DX_reg(&context) = BX_reg(&context) = CodePage; RESET_CFLAG(&context); break; case 0x02: CodePage = BX_reg(&context); RESET_CFLAG(&context); break; } break; case 0x67: /* SET HANDLE COUNT */ RESET_CFLAG(&context); break; case 0x68: /* "FFLUSH" - COMMIT FILE */ case 0x6a: /* COMMIT FILE */ fsync( BX_reg(&context) ); RESET_CFLAG(&context); break; case 0x69: /* DISK SERIAL NUMBER */ switch (AL_reg(&context)) { case 0x00: GetDiskSerialNumber(&context); break; case 0x01: SetDiskSerialNumber(&context); break; } break; case 0xdc: /* CONNECTION SERVICES - GET CONNECTION NUMBER */ break; case 0xea: /* NOVELL NETWARE - RETURN SHELL VERSION */ break; default: INT_BARF( &context, 0x21 ); break; } } dprintf_int(stddeb,"ret21: AX %04x, BX %04x, CX %04x, DX %04x, " "SI %04x, DI %04x, DS %04x, ES %04x EFL %08lx\n", AX_reg(&context), BX_reg(&context), CX_reg(&context), DX_reg(&context), SI_reg(&context), DI_reg(&context), DS_reg(&context), ES_reg(&context), EFL_reg(&context)); } void INT21_Init(void) { if ((DosHeapHandle = GlobalAlloc(GMEM_FIXED,sizeof(struct DosHeap))) == 0) { fprintf( stderr, "INT21_Init: Out of memory\n"); exit(1); } heap = (struct DosHeap *) GlobalLock(DosHeapHandle); dpb = &heap->dpb; dpbsegptr = MAKELONG( (int)&heap->dpb - (int)heap, DosHeapHandle ); heap->InDosFlag = 0; strcpy(heap->biosdate, "01/01/80"); }