1 files changed, 157 insertions, 0 deletions

diff --git a/v4.0/src/INC/DOSSYM.INC b/v4.0/src/INC/DOSSYM.INC
new file mode 100644
index 0000000..02f881e
--- /dev/null
+++ b/v4.0/src/INC/DOSSYM.INC
@@ -0,0 +1,157 @@
+;       SCCSID = @(#)dossym.asm 1.1 85/04/10
+;       SCCSID = @(#)dossym.asm 1.1 85/04/10
+        PAGE 80,132
+TRUE        EQU 0FFFFh
+FALSE       EQU 0
+
+Installed   = TRUE
+IFNDEF  DEBUG
+    DEBUG       = FALSE
+ENDIF
+
+include dbcs.sw
+include dosmac.INC
+
+include VERSIONA.INC
+
+IF2
+    %OUT    DOSSYM in Pass 2
+ENDIF
+
+BREAK <Control character definitions>
+
+c_DEL       EQU     7Fh                 ;    ASCII rubout or delete previous char
+c_BS        EQU     08h                 ; ^H ASCII backspace
+c_CR        EQU     0Dh                 ; ^M ASCII carriage return
+c_LF        EQU     0Ah                 ; ^J ASCII linefeed
+c_ETB       EQU     17h                 ; ^W ASCII end of transmission
+c_NAK       EQU     15h                 ; ^U ASCII negative acknowledge
+c_ETX       EQU     03h                 ; ^C ASCII end of text
+c_HT        EQU     09h                 ; ^I ASCII tab
+
+BREAK <Read This and Weep>
+
+;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;
+;                                                                          ;
+;            C  A  V  E  A  T     P  R  O  G  R  A  M  M  E  R             ;
+;                                                                          ;
+; Certain structures, constants and system  calls  below  are  private  to ;
+; the DOS  and  are  extremely  version-dependent.  They may change at any ;
+; time at  the  implementors'  whim.   As  a  result,  they  must  not  be ;
+; documented to  the  general  public.   If  an  extreme case arises, they ;
+; must be documented with this warning.                                    ;
+;                                                                          ;
+; Those structures and constants that are subject to  the  above  will  be ;
+; marked and bracketed with the flag:                                      ;
+;                                                                          ;
+;            C  A  V  E  A  T     P  R  O  G  R  A  M  M  E  R             ;
+;                                                                          ;
+;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;
+
+include bpb.INC
+
+include buffer.INC
+
+BREAK <User stack inside of system call and SysVars>
+; Location of user registers relative user stack pointer
+
+user_environ    STRUC
+user_AX     DW      ?
+user_BX     DW      ?
+user_CX     DW      ?
+user_DX     DW      ?
+user_SI     DW      ?
+user_DI     DW      ?
+user_BP     DW      ?
+user_DS     DW      ?
+user_ES     DW      ?
+user_IP     DW      ?
+user_CS     DW      ?
+user_F      DW      ?
+user_environ    ENDS
+
+include sysvar.INC
+
+include vector.INC
+
+include mult.INC
+
+BREAK <Disk map>
+;  MSDOS partitions the disk into 4 sections:
+;
+;  phys sector 0:   +-------------------+
+;       |           | boot/reserved     |
+;       |           +-------------------+
+;       |           |  File allocation  |
+;       v           |      table(s)     |
+;                   |  (multiple copies |
+;                   |     are kept)     |
+;                   +-------------------+
+;                   |     Directory     |
+;                   +-------------------+
+;                   |     File space    |
+;                   +-------------------+
+;                   |   Unaddressable   |
+;                   |  (to end of disk) |
+;                   +-------------------+
+;
+; All partition boundaries are sector boundaries.  The size of the FAT is
+; adjusted to maximize the file space addressable.
+
+include dirent.INC
+
+BREAK <File allocation Table information>
+;
+; The File Allocation Table uses a 12-bit entry for each allocation unit on
+; the disk.  These entries are packed, two for every three bytes.  The contents
+; of entry number N is found by 1) multiplying N by 1.5; 2) adding the result
+; to the base address of the Allocation Table; 3) fetching the 16-bit word
+; at this address; 4) If N was odd (so that N*1.5 was not an integer), shift
+; the word right four bits; 5) mask to 12 bits (AND with 0FFF hex).  Entry
+; number zero is used as an end-of-file trap in the OS and is passed to the
+; BIOS to help determine disk format.  Entry 1 is reserved for future use.
+; The first available allocation unit is assigned entry number two, and even
+; though it is the first, is called cluster 2.  Entries greater than 0FF8H
+; (12-bit fats) or 0FFF8H (16-bit fats) are end of file marks; entries of zero
+; are unallocated.  Otherwise, the contents of a FAT entry is the number of
+; the next cluster in the file.
+;
+; Clusters with bad sectors are tagged with FF7H.  Any non-zero number would
+; do because these clusters show as allocated, but are not part of any
+; allocation chain and thus will never be allocated to a file.  A particular
+; number is selected so that disk checking programs know what to do (ie.  a
+; cluster with entry FF7H which is not in a chain is not an error).
+
+include dpb.INC
+
+include curdir.INC
+
+include cpmfcb.INC
+
+include find.INC
+
+include pdb.INC
+
+include exe.INC
+
+include sf.INC
+
+include arena.INC
+
+include intnat.INC
+
+include mi.INC
+
+fChk    equ 1
+fDelim  equ 2
+fSpChk  equ 4
+fFCB    equ 8
+
+include filemode.INC
+
+include error.INC
+
+include syscall.INC
+
+SUBTTL
+
\ No newline at end of file