v4.0/src/INC/CPMFCB.INC

   1 ;       SCCSID = @(#)cpmfcb.asm 1.1 85/04/10
   2 ;       SCCSID = @(#)cpmfcb.asm 1.1 85/04/10
   3 ;BREAK <File Control Block definition>
   4
   5 ;
   6 ; Field definition for FCBs
   7 ; The FCB has the following structure:
   8 ;
   9 ;       +---------------------------+
  10 ;       |   Drive indicator(byte)   |
  11 ;       +---------------------------+
  12 ;       |    Filename (8 chars)     |
  13 ;       +---------------------------+
  14 ;       |    Extension (3 chars)    |
  15 ;       +---------------------------+
  16 ;       |   Current Extent(word)    |
  17 ;       +---------------------------+
  18 ;       |    Record size (word)     |
  19 ;       +---------------------------+
  20 ;       |    File Size (2 words)    |
  21 ;       +---------------------------+
  22 ;       |       Date of write       |
  23 ;       +---------------------------+
  24 ;       |       Time of write       |
  25 ;       +---------------------------+
  26 ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;
  27 ;            C  A  V  E  A  T     P  R  O  G  R  A  M  M  E  R             ;
  28 ;                                                                          ;
  29 ;       +---------------------------+
  30 ;       |   8 bytes reserved        |
  31 ;       +---------------------------+
  32 ;                                                                          ;
  33 ;            C  A  V  E  A  T     P  R  O  G  R  A  M  M  E  R             ;
  34 ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;
  35 ;       |    next record number     |
  36 ;       +---------------------------+
  37 ;       |   random record number    |
  38 ;       +---------------------------+
  39 ;
  40
  41 sys_fcb     STRUC
  42 fcb_drive   DB      ?
  43 fcb_name    DB      8 DUP (?)
  44 fcb_ext     DB      3 DUP (?)
  45 fcb_EXTENT  DW      ?
  46 fcb_RECSIZ  DW      ?                   ; Size of record (user settable)
  47 fcb_FILSIZ  DW      ?                   ; Size of file in bytes; used with the
  48                                         ; following word
  49 fcb_DRVBP   DW      ?                   ; BP for SEARCH FIRST and SEARCH NEXT
  50 fcb_FDATE   DW      ?                   ; Date of last writing
  51 fcb_FTIME   DW      ?                   ; Time of last writing
  52 ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;
  53 ;            C  A  V  E  A  T     P  R  O  G  R  A  M  M  E  R             ;
  54 ;                                                                          ;
  55 fcb_reserved DB      8 DUP (?)           ; RESERVED
  56 ;                                                                          ;
  57 ;            C  A  V  E  A  T     P  R  O  G  R  A  M  M  E  R             ;
  58 ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;
  59 fcb_NR      DB      ?                   ; Next record
  60 fcb_RR      DB      4 DUP (?)           ; Random record
  61 sys_fcb     ENDS
  62
  63 FILDIRENT       = fcb_FILSIZ            ; Used only by SEARCH FIRST and SEARCH
  64                                         ; NEXT
  65
  66 fcb_sfn         EQU     BYTE PTR fcb_reserved
  67
  68 ; Note that fcb_net_handle, fcb_nsl_drive, fcb_nsld_drive and fcb_l_drive
  69 ; all must point to the same byte.  Otherwise, the FCBRegen will fail.
  70 ; NOTE about this byte (fcb_nsl_drive)
  71 ;   The high two bits of this byte are used as follows to indicate the FCB type
  72 ;       00 means a local file or device with sharing loaded
  73 ;       10 means a remote (network) file
  74 ;       01 means a local file with no sharing loaded
  75 ;       11 means a local device with no sharing loaded
  76
  77 ;
  78 ; Network FCB
  79 ;
  80 fcb_net_drive   EQU     BYTE PTR fcb_reserved+1
  81 fcb_net_handle  EQU     WORD PTR fcb_reserved+2
  82 fcb_netID       EQU     DWORD PTR fcb_reserved+4
  83
  84 ;
  85 ; No sharing local file FCB
  86 ;
  87 fcb_nsl_drive   EQU     BYTE PTR fcb_reserved+1
  88 fcb_nsl_bits    EQU     BYTE PTR fcb_reserved+2
  89 fcb_nsl_firclus EQU     WORD PTR fcb_reserved+3
  90 fcb_nsl_dirsec  EQU     WORD PTR fcb_reserved+5
  91 fcb_nsl_dirpos  EQU     BYTE PTR fcb_reserved+7
  92
  93 ;
  94 ; No sharing local device FCB
  95 ;
  96 fcb_nsld_drive  EQU     BYTE PTR fcb_reserved+1
  97 fcb_nsld_drvptr EQU     DWORD PTR fcb_reserved+2
  98
  99 ;
 100 ; Sharing local FCB
 101 ;
 102 fcb_l_drive     EQU     BYTE PTR fcb_reserved+1
 103 fcb_l_firclus   EQU     WORD PTR fcb_reserved+2
 104 fcb_l_mfs       EQU     WORD PTR fcb_reserved+4
 105 fcb_l_attr      EQU     BYTE PTR fcb_reserved+6
 106
 107 ;
 108 ; Bogusness:  the four cases are:
 109 ;
 110 ;   local file      00
 111 ;   local device    40
 112 ;   local sharing   C0
 113 ;   network         80
 114 ;
 115 ; Since sharing and network collide, we cannot use a test instruction for
 116 ; deciding whether a network or a share check in involved
 117 ;
 118 FCBDEVICE   EQU 040h
 119 FCBNETWORK  EQU 080h
 120 FCBSHARE    EQU 0C0h
 121
 122 ; FCBSPECIAL must be able to mask off both net and share
 123 FCBSPECIAL  EQU 080h
 124 FCBMASK     EQU 0C0h
 125 \1a