v4.0/src/DOS/MSCONST.ASM

   1 ;       SCCSID = @(#)msconst.asm        1.4 85/09/12
   2 ;   Revision history
   3 ;      AN000  version 4.00  Jan. 1988
   4 ;      AN007  fake version check for IBMCACHE.COM
   5 include mshead.asm
   6 include version.inc
   7
   8 CODE            SEGMENT BYTE PUBLIC 'CODE'
   9         Extrn   LeaveDOS:NEAR
  10         Extrn   BadCall:FAR, OKCall:FAR
  11 CODE            ENDS
  12
  13 Break <Initialized data and data used at DOS initialization>
  14
  15 ;
  16 ; We need to identify the parts of the data area that are relevant to tasks
  17 ; and those that are relevant to the system as a whole.  Under 3.0, the system
  18 ; data will be gathered with the system code.  The process data under 2.x will
  19 ; be available for swapping and under 3.0 it will be allocated per-process.
  20 ;
  21 ; The data that is system data will be identified by [SYSTEM] in the comments
  22 ; describing that data item.
  23 ;
  24
  25         AsmVars <Kanji, Debug, Redirector, ShareF>
  26
  27 CONSTANTS       SEGMENT WORD PUBLIC 'CONST'
  28
  29         extrn   sfTabl:DWORD
  30
  31         ORG     0
  32
  33         EVEN
  34 ;
  35 ; WANGO!!!  The following word is used by SHARE and REDIR to determin data
  36 ; area compatability.  This location must be incremented EACH TIME the data
  37 ; area here gets mucked with.
  38 ;
  39 ; Also, do NOT change this position relative to DOSGROUP:0.
  40 ;
  41 Public MSCT001S,MSCT001E
  42 MSCT001S:
  43         I_am    DataVersion,WORD,<1>    ;AC000; [SYSTEM] version number for DOS DATA
  44
  45 %out WARNING!!! Debug fields are being included!!!
  46         DB      "BUG "                  ; THIS FIELD MUST BE EVEN # OF BYTES
  47         I_am    BugTyp,WORD,<0>
  48         I_am    BugLev,WORD,<0>
  49 include bugtyp.asm
  50
  51         I_am    MYNUM,WORD,<0>          ; [SYSTEM] A number that goes with MYNAME
  52         I_am    FCBLRU,WORD,<0>         ; [SYSTEM] LRU count for FCB cache
  53         I_am    OpenLRU,WORD,<0>        ; [SYSTEM] LRU count for FCB cache opens
  54 ; NOTE: We include the decl of OEM_HANDLER in IBM DOS even though it is not used.
  55 ;       This allows the REDIRector to work on either IBM or MS-DOS.
  56         PUBLIC  OEM_HANDLER
  57 OEM_HANDLER     DD      -1              ; [SYSTEM] Pointer to OEM handler code
  58         I_am    LeaveAddr,WORD,<<OFFSET DOSGroup:LeaveDOS>> ; [SYSTEM]
  59         I_am    RetryCount,WORD,<3>     ; [SYSTEM] Share retries
  60         I_am    RetryLoop,WORD,<1>      ; [SYSTEM] Share retries
  61         I_am    LastBuffer,DWORD,<-1,-1>; [SYSTEM] Buffer queue recency pointer
  62         I_am    CONTPOS,WORD            ; [SYSTEM] location in buffer of next read
  63         I_am    arena_head,WORD         ; [SYSTEM] Segment # of first arena in memory
  64 ; The following block of data is used by SYSINIT.  Do not change the order or
  65 ; size of this block
  66         PUBLIC  SYSINITVAR              ; [SYSTEM]
  67 SYSINITVAR  LABEL   WORD                ; [SYSTEM]
  68         I_am    DPBHEAD,DWORD           ; [SYSTEM] Pointer to head of DPB-FAT list
  69         I_am    sft_addr,DWORD,<<OFFSET DosGroup:sfTabl>,?> ; [SYSTEM] Pointer to first SFT table
  70         I_am    BCLOCK,DWORD            ; [SYSTEM] The CLOCK device
  71         I_am    BCON,DWORD              ; [SYSTEM] Console device entry points
  72         I_am    MAXSEC,WORD,<128>       ; [SYSTEM] Maximum allowed sector size
  73         I_am    BUFFHEAD,DWORD          ; [SYSTEM] Pointer to head of buffer queue
  74         I_am    CDSADDR,DWORD           ; [SYSTEM] Pointer to curdir structure table
  75         I_am    sftFCB,DWORD            ; [SYSTEM] pointer to FCB cache table
  76         I_am    KeepCount,WORD          ; [SYSTEM] count of FCB opens to keep
  77         I_am    NUMIO,BYTE              ; [SYSTEM] Number of disk tables
  78         I_am    CDSCOUNT,BYTE           ; [SYSTEM] Number of CDS structures in above
  79 ; A fake header for the NUL device
  80         I_am    NULDEV,DWORD            ; [SYSTEM] Link to rest of device list
  81         DW      DEVTYP OR ISNULL        ; [SYSTEM] Null device attributes
  82         short_addr  SNULDEV             ; [SYSTEM] Strategy entry point
  83         short_addr  INULDEV             ; [SYSTEM] Interrupt entry point
  84         DB      "NUL     "              ; [SYSTEM] Name of null device
  85         I_am    Splices,BYTE,<0>        ; [SYSTEM] TRUE => splices being done
  86         I_am    Special_Entries,WORD,<0>; [SYSTEM] address of specail entries   ;AN000;
  87         I_am    IFS_DOS_CALL,DWORD      ; [SYSTEM] entry for IFS DOS service    ;AN000;
  88         I_am    IFS_HEADER,DWORD        ; [SYSTEM] IFS header chain             ;AN000;
  89         I_am    BUFFERS_PARM1,WORD,<0>  ; [SYSTEM] value of BUFFERS= ,m         ;AN000;
  90         I_am    BUFFERS_PARM2,WORD,<0>  ; [SYSTEM] value of BUFFERS= ,n         ;AN000;
  91         I_am    BOOTDRIVE,BYTE          ; [SYSTEM] the boot drive               ;AN000;
  92         I_am    DDMOVE,BYTE,<0>         ; [SYSTEM] 1 if we need DWORD move      ;AN000;
  93         I_am    EXT_MEM_SIZE,WORD,<0>   ; [SYSTEM] extended memory size         ;AN000;
  94
  95         PUBLIC  HASHINITVAR             ; [SYSTEM]                              ;AN000;
  96 HASHINITVAR  LABEL   WORD               ; [SYSTEM]                              ;AN000;
  97         I_am    BUF_HASH_PTR,DWORD      ; [SYSTEM] buffer Hash table addr       ;AN000;
  98         I_am    BUF_HASH_COUNT,WORD,<1> ; [SYSTEM] number of Hash entries       ;AN000;
  99         I_am    SC_CACHE_PTR,DWORD      ; [SYSTEM] secondary cache pointer      ;AN000;
 100         I_am    SC_CACHE_COUNT,WORD,<0> ; [SYSTEM] secondary cache count        ;AN000;
 101
 102 IF      BUFFERFLAG
 103
 104         I_am    BUF_EMS_SAFE_FLAG,BYTE,<1>      ; indicates whether the page used by buffers is safe or not
 105         I_am    BUF_EMS_LAST_PAGE,4,<0,0,0,0>   ; holds the last page above 640k
 106         I_am    BUF_EMS_FIRST_PAGE,4,<0,0,0,0>  ; holds the first page above 640K
 107         I_am    BUF_EMS_NPA640,WORD,<0>         ; holds the number of pages above 640K
 108
 109 ENDIF
 110
 111         I_am    BUF_EMS_MODE,BYTE,<-1>  ; [SYSTEM] EMS mode                     ;AN000;
 112         I_am    BUF_EMS_HANDLE,WORD     ; [SYSTEM] buffer EMS handle            ;AN000;
 113         I_am    BUF_EMS_PAGE_FRAME,WORD ,<-1>;[SYSTEM] EMS page frame number    ;AN000;
 114         I_am    BUF_EMS_SEG_CNT,WORD,<1>; [SYSTEM] EMS seg count                ;AN000;
 115         I_am    BUF_EMS_PFRAME,WORD     ; [SYSTEM] EMS page frame seg address   ;AN000;
 116         I_am    BUF_EMS_RESERV,WORD,<0> ; [SYSTEM] reserved                     ;AN000;
 117
 118 IF      BUFFERFLAG
 119         I_am    BUF_EMS_MAP_BUFF,1,<0>  ; this is not used to save the state of the
 120                                         ; of the buffers page. this one byte is
 121                                         ; retained to keep the size of this data
 122                                         ; block the same.
 123 ELSE
 124         I_am    BUF_EMS_MAP_BUFF,12,<0,0,0,0,0,0,0,0,0,0,0,0>   ; map buufer    ;AN000;
 125 ENDIF
 126
 127 ; End of SYSINITVar block
 128
 129 ;
 130 ; Sharer jump table
 131 ;
 132 PUBLIC  JShare
 133         EVEN
 134 JShare  LABEL   DWORD
 135         DW      OFFSET DOSGROUP:BadCall, 0
 136         DW      OFFSET DOSGROUP:OKCall,  0  ;   1   MFT_enter
 137         DW      OFFSET DOSGROUP:OKCall,  0  ;   2   MFTClose
 138         DW      OFFSET DOSGROUP:BadCall, 0  ;   3   MFTclU
 139         DW      OFFSET DOSGROUP:BadCall, 0  ;   4   MFTCloseP
 140         DW      OFFSET DOSGROUP:BadCall, 0  ;   5   MFTCloN
 141         DW      OFFSET DOSGROUP:BadCall, 0  ;   6   set_block
 142         DW      OFFSET DOSGROUP:BadCall, 0  ;   7   clr_block
 143         DW      OFFSET DOSGROUP:OKCall,  0  ;   8   chk_block
 144         DW      OFFSET DOSGROUP:BadCall, 0  ;   9   MFT_get
 145         DW      OFFSET DOSGROUP:BadCall, 0  ;   10  ShSave
 146         DW      OFFSET DOSGROUP:BadCall, 0  ;   11  ShChk
 147         DW      OFFSET DOSGROUP:OKCall , 0  ;   12  ShCol
 148         DW      OFFSET DOSGROUP:BadCall, 0  ;   13  ShCloseFile
 149         DW      OFFSET DOSGROUP:BadCall, 0  ;   14  ShSU
 150
 151 MSCT001E:
 152 CONSTANTS       ENDS
 153 \1a