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diff --git a/v4.0/src/CMD/ASSIGN/ASSGPARM.ASM b/v4.0/src/CMD/ASSIGN/ASSGPARM.ASM
new file mode 100644
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+
+        PAGE    ,132                    ;
+        TITLE   ASSPARM.SAL - ASSIGN  SYSTEM COMMAND LINE PARSER
+;****************** START OF SPECIFICATIONS *****************************
+; MODULE NAME: ASSGPARM.SAL
+;
+; DESCRIPTIVE NAME: Include the DOS system PARSER in the SEGMENT
+;                   configuration expected by the modules of ASSIGN.
+;
+;FUNCTION: The common code of the DOS command line PARSER is optimized by
+;          the setting of certain switches that cause the conditional
+;          assembly of only the required portions of the common PARSER.
+;          The segment registers are ASSUMED according to the type .EXE.
+;
+; ENTRY POINT: SYSPARSE, near
+;
+; INPUT:
+;       ES - has seg id of the SEGMENT
+;            that contains the input control blocks,
+;            defined below.
+;
+;       DI - offset into ES of the PARMS INPUT BLOCK
+;
+;       DS - has seg id of the SEGMENT
+;            that contains the DOS input COMMAND
+;            string, which is originally presented at 81h
+;            in the PSP.
+;
+;       SI - offset into DS of the text of the DOS input COMMAND string
+;            as originally presented at 81H in the PSP.
+;
+;       DX - zero
+;
+;       CX - ordinal value, intially zero, updated on each subsequent call
+;            to the value returned in CX on the previous call.
+;
+;       CS - points to the segment containing the
+;            INCLUDE PARSE.SAL statement
+;
+;       DS - also points to the segment containing the INCLUDE
+;            PARSE.SAL statement.
+;
+; EXIT-NORMAL:  Output registers:
+;        AX - return code:
+;           RC_No_Error     equ     0    ; No error
+;           RC_EOL          equ     -1   ; End of command line
+;
+;        DX - Offset into ES of the selected RESULT BLOCK.
+;        BL - terminated delimiter code
+;        CX - new operand ordinal
+;        SI - set past scanned operand
+;
+; EXIT-ERROR: Output registers:
+;        AX - return code:
+;           RC_Too_Many     equ     1    ; Too many operands
+;           RC_Op_Missing   equ     2    ; Required operand missing
+;           RC_Not_In_SW    equ     3    ; Not in switch list provided
+;           RC_Not_In_Key   equ     4    ; Not in keyword list provided
+;           RC_Out_Of_Range equ     6    ; Out of range specified
+;           RC_Not_In_Val   equ     7    ; Not in value list provided
+;           RC_Not_In_Str   equ     8    ; Not in string list provided
+;           RC_Syntax       equ     9    ; Syntax error
+;
+; INTERNAL REFERENCES:
+;    ROUTINES: SYSPARSE:near (INCLUDEd in PARSE.SAL)
+;
+;    DATA AREAS: none
+;
+; EXTERNAL REFERENCES:
+;    ROUTINES: none
+;
+;    DATA AREAS: control blocks pointed to by input registers.
+;
+; NOTES:
+;        This module should be processed with the ASMUT preprocessor
+;        with the re-alignment not requested, as:
+;
+;               SALUT  ASSPARM,NUL;
+;
+;        To assemble these modules, the sequential
+;        ordering of segments may be used.
+;
+;        For LINK instructions, refer to the PROLOG of the main module,
+;        ASSIGN.SAL
+;
+; REVISION HISTORY: A000 Version 4.00: add PARSER, System Message Handler,
+;
+; COPYRIGHT: "Microsoft DOS ASSIGN Utility"
+;            "Version 4.00 (C)Copyright 1988 Microsoft Corp"
+;            "Licensed Material - Program Property of Microsoft "
+;
+;****************** END OF SPECIFICATIONS *****************************
+        IF1
+            %OUT    COMPONENT=ASSIGN, MODULE=ASSPARM.SAL...
+        ENDIF
+; =  =  =  =  =  =  =  =  =  =  =  =
+        HEADER  <MACRO DEFINITION>
+; =  =  =  =  =  =  =  =  =  =  =  =
+
+HEADER  MACRO   TEXT
+.XLIST
+        SUBTTL  TEXT
+.LIST
+        PAGE
+        ENDM
+
+; =  =  =  =  =  =  =  =  =  =  =  =
+        HEADER  <SYSPARSE - SYSTEM COMMAND LINE PARSER> ;                       ;AN000;
+CODE    SEGMENT PARA PUBLIC             ;                                       ;AN000;
+        ASSUME  CS:CODE,DS:CODE,ES:CODE,SS:CODE ;                               ;AN000;
+
+        PUBLIC  SYSPARSE                ;SUBROUTINE ENTRY POINT                 ;AN000;
+
+CAPSW   EQU     1                       ;SUPPORT FILENAME TBL CAPS
+FARSW   EQU     0                       ;PARSER CALL NEAR
+FILESW  EQU     0                       ;CHECK FOR FILESPEC
+DATESW  EQU     0                       ;SUPPRESS DATE CHECKING
+TIMESW  EQU     0                       ;SUPPRESS TIME CHECKING
+CMPXSW  EQU     0                       ;SUPPRESS CHECKING COMPLEX LIST
+NUMSW   EQU     0                       ;SUPPRESS CHECKING NUMERIC VALUE
+KEYSW   EQU     0                       ;SUPPRESS KEYWORD SUPPORT
+VAL1SW  EQU     0                       ;SUPPRESS SUPPORT OF VALUE DEFINITION 1
+VAL2SW  EQU     0                       ;SUPPRESS SUPPORT OF VALUE DEFINITION 2
+VAL3SW  EQU     1                       ;SUPPORT OF VALUE DEFINITION 3
+DRVSW   EQU     0                       ;SUPPORT OF DRIVE ONLY FORMAT
+QUSSW   EQU     0                       ;SUPPRESS SUPPORT OF QUOTED STRING FORMAT
+
+        IF1                             ;                                       ;AN000;
+            %OUT    COMPONENT=ASSIGN, SUBCOMPONENT=PARSE, MODULE=PARSE.ASM...
+            %OUT    COMPONENT=ASSIGN, SUBCOMPONENT=PARSE, MODULE=PSDATA.INC...
+        ENDIF                           ;                                       ;AN000;
+
+                                        ;PARSE WORK AREA & EQUATES
+
+.xlist
+        INCLUDE PARSE.ASM
+.list
+
+CODE    ENDS
+        END
+
\ No newline at end of file