v4.0/src/INC/SMDOSSYM.INC

   1 ;       SCCSID = @(#)dossym.asm 1.1 85/04/10
   2 ;       SCCSID = @(#)dossym.asm 1.1 85/04/10
   3         PAGE 80,132
   4 TRUE        EQU 0FFFFh
   5 FALSE       EQU 0
   6
   7 Installed   = TRUE
   8 IFNDEF  DEBUG
   9     DEBUG       = FALSE
  10 ENDIF
  11
  12 include dosmac.INC
  13 INCLUDE VERSIONA.INC            ;DEFINE THE MAJOR AND MINOR VERSION NUMBERS
  14
  15 IF2
  16     %OUT    DOSSYM in Pass 2
  17 ENDIF
  18
  19 BREAK <Control character definitions>
  20
  21 c_DEL       EQU     7Fh                 ;    ASCII rubout or delete previous char
  22 c_BS        EQU     08h                 ; ^H ASCII backspace
  23 c_CR        EQU     0Dh                 ; ^M ASCII carriage return
  24 c_LF        EQU     0Ah                 ; ^J ASCII linefeed
  25 c_ETB       EQU     17h                 ; ^W ASCII end of transmission
  26 c_NAK       EQU     15h                 ; ^U ASCII negative acknowledge
  27 c_ETX       EQU     03h                 ; ^C ASCII end of text
  28 c_HT        EQU     09h                 ; ^I ASCII tab
  29
  30 BREAK <Read This and Weep>
  31
  32 ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;
  33 ;                                                                          ;
  34 ;            C  A  V  E  A  T     P  R  O  G  R  A  M  M  E  R             ;
  35 ;                                                                          ;
  36 ; Certain structures, constants and system  calls  below  are  private  to ;
  37 ; the DOS  and  are  extremely  version-dependent.  They may change at any ;
  38 ; time at  the  implementors'  whim.   As  a  result,  they  must  not  be ;
  39 ; documented to  the  general  public.   If  an  extreme case arises, they ;
  40 ; must be documented with this warning.                                    ;
  41 ;                                                                          ;
  42 ; Those structures and constants that are subject to  the  above  will  be ;
  43 ; marked and bracketed with the flag:                                      ;
  44 ;                                                                          ;
  45 ;            C  A  V  E  A  T     P  R  O  G  R  A  M  M  E  R             ;
  46 ;                                                                          ;
  47 ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;
  48
  49 include bpb.INC
  50
  51 include buffer.INC
  52
  53 BREAK <User stack inside of system call and SysVars>
  54 ; Location of user registers relative user stack pointer
  55
  56 user_environ    STRUC
  57 user_AX     DW      ?
  58 user_BX     DW      ?
  59 user_CX     DW      ?
  60 user_DX     DW      ?
  61 user_SI     DW      ?
  62 user_DI     DW      ?
  63 user_BP     DW      ?
  64 user_DS     DW      ?
  65 user_ES     DW      ?
  66 user_IP     DW      ?
  67 user_CS     DW      ?
  68 user_F      DW      ?
  69 user_environ    ENDS
  70
  71 include sysvar.INC
  72
  73 include vector.INC
  74
  75 ;include mult.INC
  76
  77 BREAK <Disk map>
  78 ;  MSDOS partitions the disk into 4 sections:
  79 ;
  80 ;  phys sector 0:   +-------------------+
  81 ;       |           | boot/reserved     |
  82 ;       |           +-------------------+
  83 ;       |           |  File allocation  |
  84 ;       v           |      table(s)     |
  85 ;                   |  (multiple copies |
  86 ;                   |     are kept)     |
  87 ;                   +-------------------+
  88 ;                   |     Directory     |
  89 ;                   +-------------------+
  90 ;                   |     File space    |
  91 ;                   +-------------------+
  92 ;                   |   Unaddressable   |
  93 ;                   |  (to end of disk) |
  94 ;                   +-------------------+
  95 ;
  96 ; All partition boundaries are sector boundaries.  The size of the FAT is
  97 ; adjusted to maximize the file space addressable.
  98
  99 include dirent.INC
 100
 101 BREAK <File allocation Table information>
 102 ;
 103 ; The File Allocation Table uses a 12-bit entry for each allocation unit on
 104 ; the disk.  These entries are packed, two for every three bytes.  The contents
 105 ; of entry number N is found by 1) multiplying N by 1.5; 2) adding the result
 106 ; to the base address of the Allocation Table; 3) fetching the 16-bit word
 107 ; at this address; 4) If N was odd (so that N*1.5 was not an integer), shift
 108 ; the word right four bits; 5) mask to 12 bits (AND with 0FFF hex).  Entry
 109 ; number zero is used as an end-of-file trap in the OS and is passed to the
 110 ; BIOS to help determine disk format.  Entry 1 is reserved for future use.
 111 ; The first available allocation unit is assigned entry number two, and even
 112 ; though it is the first, is called cluster 2.  Entries greater than 0FF8H
 113 ; (12-bit fats) or 0FFF8H (16-bit fats) are end of file marks; entries of zero
 114 ; are unallocated.  Otherwise, the contents of a FAT entry is the number of
 115 ; the next cluster in the file.
 116 ;
 117 ; Clusters with bad sectors are tagged with FF7H.  Any non-zero number would
 118 ; do because these clusters show as allocated, but are not part of any
 119 ; allocation chain and thus will never be allocated to a file.  A particular
 120 ; number is selected so that disk checking programs know what to do (ie.  a
 121 ; cluster with entry FF7H which is not in a chain is not an error).
 122
 123 include dpb.INC
 124
 125 include curdir.INC
 126
 127 ;include cpmfcb.INC
 128
 129 ;include find.INC
 130
 131 include pdb.INC
 132
 133 include exe.INC
 134
 135 include sf.INC
 136
 137 include arena.INC
 138
 139 include intnat.INC
 140
 141 include mi.INC
 142
 143 fChk    equ 1
 144 fDelim  equ 2
 145 fSpChk  equ 4
 146 fFCB    equ 8
 147
 148 ;include filemode.INC
 149
 150 ;include error.INC
 151
 152 include syscall.INC
 153
 154 include doscntry.inc            ;J.K. 5/26/86
 155
 156 SUBTTL
 157 \1a