v4.0/src/INC/MSBDS.INC

   1
   2 %OUT MSBDS.INC...
   3 ;       SCCSID = @(#)IBMBDS.ASM 1.9 85/09/16
   4 ;==============================================================================
   5 ;REVISION HISTORY:
   6 ;AN000 - New for DOS Version 4.00 - J.K.
   7 ;AC000 - Changed for DOS Version 4.00 - J.K.
   8 ;AN00x - PTM number for DOS Version 4.00 - J.K.
   9 ;==============================================================================
  10 ;AN001; D113 Disable I/O access to unformatted media                9/03/87 J.K.
  11 ;==============================================================================
  12
  13 ; VALUES FOR VARIOUS FLAGS IN BDS.FLAGS.
  14
  15 FNON_REMOVABLE      EQU     01H         ;FOR NON-REMOVABLE MEDIA
  16 FCHANGELINE         EQU     02H         ;IF CHANGELINE SUPPORTED ON DRIVE
  17 RETURN_FAKE_BPB     EQU     04H         ; WHEN SET, DON'T DO A BUILD BPB
  18                                         ; JUST RETURN THE FAKE ONE
  19 GOOD_TRACKLAYOUT    EQU     08H         ; THE TRACK LAYOUT HAS NO FUNNY SECTORS
  20 ; FCHANGED_BY_FORMAT  EQU           08H
  21 FI_AM_MULT          EQU     10H         ;IF MORE THAN ONE LOGICAL FOR THIS PHYSICAL
  22 FI_OWN_PHYSICAL     EQU     20H         ;SIGNIFY LOGICAL OWNER OF THIS PHYSICAL
  23 FCHANGED            EQU     40H         ;INDICATES MEDIA CHANGED
  24 SET_DASD_TRUE       EQU     80H         ; SET DASD BEFORE NEXT FORMAT
  25 FCHANGED_BY_FORMAT  EQU    100H         ;MEDIA CHANGED BY FORMAT
  26 UNFORMATTED_MEDIA   EQU    200H         ;AN001; Fixed disk only
  27
  28 ;
  29 ; VARIOUS FORM FACTORS TO DESCRIBE MEDIA
  30 ;
  31 FF48TPI             EQU     0
  32 FF96TPI             EQU     1
  33 FFSMALL             EQU     2
  34 FFHARDFILE          EQU     5
  35 FFOTHER             EQU     7
  36
  37 BDS_TYPE        STRUC
  38 LINK            DD              ?       ; LINK TO NEXT BDS
  39 DRIVENUM        DB              ?       ; INT 13 DRIVE NUMBER
  40 DRIVELET        DB              ?       ; DOS DRIVE NUMBER
  41 BYTEPERSEC      DW              ?       ; NUMBER OF BYTES/SEC
  42 SECPERCLUS      DB              ?       ; SEC PER ALLOCATION UNIT
  43 RESSEC          DW              ?       ; NUMBER OF RESERVED SECTORS
  44 CFAT            DB              ?       ; NUMBER OF FATS
  45 CDIR            DW              ?       ; NUMBER OF DIRECTORY ENTRIES
  46 DRVLIM          DW              ?       ; NUMBER OF SECTORS ON MEDIUM
  47 MEDIAD          DB              ?       ; MEDIA DESCRIPTOR BYTE
  48 CSECFAT         DW              ?       ; NUMBER OF SECTORS/FAT
  49 SECLIM          DW              ?       ; SECTORS PER TRACK
  50 HDLIM           DW              ?       ; MAX NUMBER OF HEADS
  51 HIDSEC_L        DW              ?       ; NUMBER OF HIDDEN SECTORS
  52 HIDSEC_H        dw              0       ;J.K.87
  53 DRVLIM_L        dw              0       ;J.K.87
  54 DRVLIM_H        dw              0       ;J.K.87
  55 FATSIZ          DB              ?       ; FLAGS...
  56 OPCNT           DW              ?       ; OPEN REF. COUNT
  57 FORMFACTOR      DB              ?       ; FORM FACTOR INDEX
  58 FLAGS           DW              ?       ; VARIOUS FLAGS
  59 CCYLN           DW              ?       ; MAX NUMBER OF CYLINDERS
  60 RBYTEPERSEC     DW              ?       ; RECOMMENDED BPB
  61 RSECPERCLUS     DB              ?
  62 RRESSEC         DW              ?
  63 RCFAT           DB              ?
  64 RCDIR           DW              ?
  65 RDRVLIM         DW              ?
  66 RMEDIAD         DB              ?
  67 RCSECFAT        DW              ?
  68 RSECLIM         DW              ?
  69 RHDLIM          DW              ?
  70 RHIDSEC_L       DW              ?
  71 RHIDSEC_H       DW              0       ;J.K.87
  72 RDRVLIM_L       dw              0       ;J.K.87
  73 RDRVLIM_H       dw              0       ;J.K.87
  74 RESERVE         DB              6 DUP (?)       ; RESERVED FOR FUTURE
  75 TRACK           DB              ?       ; LAST TRACK ACCESSED ON DRIVE
  76 TIM_LO          DW              ?       ; TIME OF LAST ACCESS. KEEP
  77 TIM_HI          DW              ?       ; THESE CONTIGUOUS.
  78 VOLID           DB              12 DUP (?)      ; VOLUME ID OF MEDIUM
  79 VOL_SERIAL      dd      0         ;J.K.87 Current volume serial number from Boot record
  80 FILESYS_Id      db      9 dup (0) ;J.K.87 Current file system id from Boot record
  81 BDS_TYPE        ENDS
  82
  83 BPBSIZE     =   TRACK - RBYTEPERSEC ; SIZE IN BYTES OF RECBPB AREA IN THE BDS
  84
  85
  86 ;*********************************************************************
  87 ;       BDS structure for mini disk - J.K. 4/7/86
  88 ;*********************************************************************
  89
  90 BDSM_type       struc
  91 mlink           DW      -1                      ;Link to next structure
  92                 DW      ?
  93 mdriveNum       DB      80                      ;Int 13 Drive Number
  94 mdriveLet       DB      3                       ;Logical Drive Number
  95 mBytePerSec     DW      512
  96 mSecPerClus     DB      1                       ;Sectors/allocation unit
  97 mRESSEC         DW      1                       ;Reserved sectors for DOS
  98 mcFAT           DB      2                       ;No. of allocation tables
  99 mcDIR           DW      16                      ;Number of directory entries
 100 mDRVLIM         DW      0                       ;Number of sectors (at 512 bytes each)
 101 mMediad         DB      11111000B               ;Media descriptor
 102 mcSecFat        DW      1                       ;Number of FAT sectors
 103 mSECLIM         DW      0                       ;Sector limit
 104 mHDLIM          DW      0                       ;Head limit
 105 mHIDSEC_L       DW      0                       ;Hidden sector count
 106 mHidsec_H       dw      0                       ;J.K.87
 107 mDrvlim_L       dw      0                       ;J.K.87
 108 mDrvlim_H       dw      0                       ;J.K.87
 109 mFatSiz         DB      0                       ;TRUE => bigfat
 110 mOPCNT          DW      0                       ;Open Ref. Count
 111 mFormFactor     DB      3                       ;Form Factor
 112 mFLAGS          DW      0020H                   ;Various Flags
 113 mcCyln          dw      40                      ;max number of cylinders
 114 mRecBPB         db      31 dup (0)              ;Recommended BPB for drive
 115 mTrack          db      -1
 116 IsMini          dw      1                       ;Overlapping TIM_LOH
 117 Hidden_Trks     dw      0                       ;Overlapping TIM_HIH
 118 mVOLID          DB      "NO NAME    "           ;Volume ID for this disk
 119                 DB      0                       ;ASCIZII for "NO NAME    "
 120 mVol_Serial     dd      0          ;Current volume serial number from Boot record
 121 mFileSys_Id     db      "FAT12   " ;Current file system id from Boot record
 122                 db      0
 123
 124 BDSM_type       ENDS
 125 ;******************************************************************************
 126 Max_mini_dsk_num = 23         ;J.K. 4/7/86 - max # of mini disk ibmbio can support
 127 ;
 128