255 lines
7.9 KiB
NASM
255 lines
7.9 KiB
NASM
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; SCCSID = @(#)const2.asm 1.4 85/07/24
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Break <Initialized data and data used at DOS initialization>
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;
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; We need to identify the parts of the data area that are relevant to tasks
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; and those that are relevant to the system as a whole. Under 3.0, the system
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; data will be gathered with the system code. The process data under 2.x will
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; be available for swapping and under 3.0 it will be allocated per-process.
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;
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; The data that is system data will be identified by [SYSTEM] in the comments
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; describing that data item.
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;
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include dossvc.inc
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; On NT SFT Size is smaller than DOS so we have to pad some space to maintain
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; the offsets in data segmeents. Below FILLSPACE is pad. 59 is the size of
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; DOS5.0 sft entry.
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FILLSPACE equ (sf_default_number * (59 - (SIZE sf_entry)))
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AsmVars <Debug, Redirector, ShareF>
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DOSDATA SEGMENT WORD PUBLIC 'DATA'
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;
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; Table of routines for assignable devices
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;
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; MSDOS allows assignment if the following standard devices:
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; stdin (usually CON input)
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; stdout (usually CON output)
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; auxin (usually AUX input)
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; auxout (usually AUX output)
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; stdlpt (usually PRN output)
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;
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; SPECIAL NOTE:
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; Status of a file is a strange idea. We choose to handle it in this
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; manner: If we're not at end-of-file, then we always say that we have a
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; character. Otherwise, we return ^Z as the character and set the ZERO
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; flag. In this manner we can support program written under the old DOS
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; (they use ^Z as EOF on devices) and programs written under the new DOS
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; (they use the ZERO flag as EOF).
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; Default SFTs for boot up
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Public CONST001S,CONST001E
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CONST001s label byte
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PUBLIC sftabl
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sftabl LABEL DWORD ; [SYSTEM] file table
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DW -1 ; [SYSTEM] link to next table
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DW -1 ; [SYSTEM] link seg to next table
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DW sf_default_number ; [SYSTEM] Number of entries in table
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DB sf_default_number DUP ( (SIZE sf_entry) DUP (0)); [SYSTEM]
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DB FILLSPACE DUP (0) ; PAD to maintain correct offsets
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; the next two variables relate to the position of the logical stdout/stdin
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; cursor. They are only meaningful when stdin/stdout are assigned to the
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; console.
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I_am CARPOS,BYTE ; [SYSTEM] cursor position in stdin
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I_am STARTPOS,BYTE ; [SYSTEM] position of cursor at beginning of buffered input call
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I_am INBUF,128 ; [SYSTEM] general device input buffer
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I_am CONBUF,131 ; [SYSTEM] The rest of INBUF and console buffer
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I_am PFLAG,BYTE ; [SYSTEM] printer echoing flag
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I_am VERFLG,BYTE ; [SYSTEM] Initialize with verify off
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I_am CharCo,BYTE,<00000011B> ; [SYSTEM] Allows statchks every 4 chars...
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I_am chSwitch,BYTE,<'/'> ; UNUSED - obsolete datum, can be reused
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I_am AllocMethod,BYTE ; [SYSTEM] how to alloc first(best)last
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I_am fShare,BYTE,<0> ; [SYSTEM] TRUE => sharing installed
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I_am DIFFNAM,BYTE,<1> ; [SYSTEM] Indicates when MYNAME has
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; changed
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I_am MYNAME,16,<32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32>
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; [SYSTEM] My network name
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;
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; The following table is a list of addresses that the sharer patches to be
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; PUSH AX to enable the critical sections
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;
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PUBLIC CritPatch
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CritPatch LABEL WORD
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IRP sect,<critDisk,critDevice>
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IF (NOT REDIRECTOR) AND (NOT SHAREF)
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;
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;SR; Change code patch address to a variable in data segment
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;
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dw OFFSET DOSDATA: redir_patch
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dw OFFSET DOSDATA: redir_patch
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;hkn Short_Addr E§
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;hkn Short_Addr L§
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ELSE
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DW 0
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DW 0
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ENDIF
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ENDM
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DW 0
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;
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; WARNING!!! PRINT and PSPRINT *REQUIRE* ErrorMode to precede INDOS.
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; Also, IBM server 1.0 requires this also.
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;
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EVEN ; Force swap area to start on word boundry
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PUBLIC SWAP_START
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SWAP_START LABEL BYTE
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I_am ErrorMode,BYTE ; Flag for INT 24 processing
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I_am INDOS,BYTE,<0> ; DOS status for interrupt processing
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I_am WPErr,BYTE,<-1> ; Write protect error flag
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I_am EXTERR_LOCUS,BYTE ; Extended Error Locus
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I_am EXTERR,WORD,<0> ; Extended Error code
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;WARNING Following two bytes Accessed as word in $GetExtendedError
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I_am EXTERR_ACTION,BYTE ; Extended Error Action
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I_am EXTERR_CLASS,BYTE ; Extended Error Class
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; end warning
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I_am EXTERRPT,DWORD ; Extended Error pointer
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I_am DMAADD,DWORD,<80h,?> ; User's disk transfer address (disp/seg)
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I_am CurrentPDB,WORD ; Current process identifier
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I_am ConC_spsave,WORD ; saved SP before ^C
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I_am exit_code,WORD ; exit code of last proc.
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I_am CURDRV,BYTE ; Default drive (init A)
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I_am CNTCFLAG,BYTE,<0> ; ^C check in dispatch disabled
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; F.C. 2/17/86
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I_am CPSWFLAG,BYTE,<0> ; Code Page Switching Flag DOS 4.00
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I_am CPSWSAVE,BYTE,<0> ; copy of above in case of ABORT
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EVEN
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PUBLIC Swap_Always
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Swap_Always LABEL BYTE
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I_am USER_IN_AX,WORD ; User INPUT AX value (used for
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; extended error type stuff. NOTE:
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; does not have Correct value on
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; 1-12, OEM, Get/Set CurrentPDB,
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; GetExtendedError system calls
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I_am PROC_ID,WORD,<0> ; PID for sharing (0 = local)
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I_am USER_ID,WORD,<0> ; Machine for sharing (0 = local)
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I_am FirstArena,WORD ; first free block found
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I_am BestArena,WORD ; best free block found
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I_am LastArena,WORD ; last free block found
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I_am EndMem,WORD ; End of memory used in DOSINIT
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I_am LASTENT,WORD ; Last entry for directory search
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I_am FAILERR,BYTE,<0> ; NZ if user did FAIL on I 24
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I_am ALLOWED,BYTE,<0> ; Allowed I 24 answers (see allowed_)
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I_am NoSetDir,BYTE ; true -> do not set directory
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I_am DidCTRLC,BYTE ; true -> we did a ^C exit
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I_am SpaceFlag,BYTE ; true -> embedded spaces are allowed in FCB
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; Warning! The following items are accessed as a WORD in TIME.ASM
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EVEN
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I_am DAY,BYTE,<0> ; Day of month
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I_am MONTH,BYTE,<0> ; Month of year
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I_am YEAR,WORD,<0> ; Year (with century)
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I_am DAYCNT,WORD,<-1> ; Day count from beginning of year
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I_am WEEKDAY,BYTE,<0> ; Day of week
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; end warning
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I_am CONSWAP,BYTE ; TRUE => console was swapped during device read
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I_am IDLEINT,BYTE,<1> ; TRUE => idle int is allowed
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I_am fAborting,BYTE,<0> ; TRUE => abort in progress
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; Combination of all device call parameters
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PUBLIC DEVCALL ;
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DEVCALL SRHEAD <> ; basic header for disk packet
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PUBLIC CALLUNIT
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CALLUNIT LABEL BYTE ; unit number for disk
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CALLFLSH LABEL WORD ;
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I_am CALLMED,BYTE ; media byte
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CALLBR LABEL DWORD ;
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PUBLIC CALLXAD ;
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CALLXAD LABEL DWORD ;
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I_am CALLRBYT,BYTE ;
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PUBLIC CALLVIDM ;
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CALLVIDM LABEL DWORD ;
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DB 3 DUP(?) ;
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PUBLIC CallBPB ;
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CALLBPB LABEL DWORD ;
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I_am CALLSCNT,WORD ;
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PUBLIC CALLSSEC
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CALLSSEC LABEL WORD ;
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DW ? ;
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I_am CALLVIDRW,DWORD ;
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;
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I_am CALLNEWSC,DWORD ; starting sector for >32mb
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I_am CALLDEVAD,DWORD ; stash for device entry point
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;
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; Same as above for I/O calls ;
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;
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PUBLIC IOCall ;
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IOCALL SRHEAD <> ;
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IOFLSH LABEL WORD ;
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PUBLIC IORCHR ;
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IORCHR LABEL BYTE ;
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I_am IOMED,BYTE ;
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I_am IOXAD,DWORD ;
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I_am IOSCNT,WORD ;
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I_am IOSSEC,WORD ;
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; Call struct for DSKSTATCHK ;
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I_am DSKSTCALL,2,<DRDNDHL,0> ;
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I_am DSKSTCOM,1,<DEVRDND> ;
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I_am DSKSTST,WORD ;
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DB 8 DUP (0) ;
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I_am DSKCHRET,BYTE ;
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;hkn; short_addr has been changed to provide offset in DOSCODE.
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;hkn; deviobuf is in DATA seg (DOSDATA)
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;hkn short_addr DEVIOBUF ;
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DW offset DOSDATA:DEVIOBUF
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DW ? ; DOS segment set at Init
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I_AM DSKSTCNT,WORD,<1> ;
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DW 0 ;
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I_am CreatePDB,BYTE ; flag for creating a process
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PUBLIC Lock_Buffer ;
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Lock_Buffer LABEL DWORD ;MS. DOS Lock Buffer for Ext Lock
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DD ? ;MS. position
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DD ? ;MS. length
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CONST001e label byte
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PUBLIC vheDev
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vheDev SYSDEV <-1,0,0,0,>
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;hkn; the foll. was moved from dosmes.asm.
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EVEN ; needed to maintain offsets
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PUBLIC UserNum, OEMNum
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Public DMES001S,DMES001E
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DMES001S Label byte
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USERNUM DW ? ; 24 bit user number
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DB ?
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IF IBM
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IF IBMCOPYRIGHT
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OEMNUM DB 0 ; 8 bit OEM number
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ELSE
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OEMNUM DB 0FFH ; 8 bit OEM number
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ENDIF
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ELSE
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OEMNUM DB 0FFH
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ENDIF
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DMES001E label byte
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DOSDATA ENDS
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