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MS-DOS/v2.0/source/TCODE5.ASM

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MS-DOS v2.0 Release
1983-08-13 01:53:34 +01:00
TITLE PART5 - COMMAND Transient routines.
INCLUDE COMSW.ASM
.xlist
.xcref
INCLUDE DOSSYM.ASM
INCLUDE DEVSYM.ASM
INCLUDE COMSEG.ASM
.list
.cref
INCLUDE COMEQU.ASM
CODERES SEGMENT PUBLIC
IF IBMVER
EXTRN EXEC_WAIT:NEAR
ENDIF
CODERES ENDS
DATARES SEGMENT PUBLIC
EXTRN BATCH:WORD,BATLOC:DWORD,BATBYT:BYTE,ECHOFLAG:BYTE
EXTRN SINGLECOM:WORD,RE_OUTSTR:BYTE,PIPEFLAG:BYTE,PIPEPTR:WORD
EXTRN RE_INSTR:BYTE,RE_OUT_APP:BYTE,PARMBUF:BYTE,PIPESTR:BYTE
EXTRN LTPA:WORD,ENVIRSEG:WORD
DATARES ENDS
TRANDATA SEGMENT PUBLIC
EXTRN PIPEEMES:BYTE,NULPATH:BYTE,NOSPACE:BYTE
EXTRN DBACK:BYTE,PROMPT_TABLE:BYTE
TRANDATA ENDS
TRANSPACE SEGMENT PUBLIC
EXTRN PATHCNT:WORD,PATHPOS:WORD,PATHSW:WORD
EXTRN DESTISDIR:BYTE,DESTTAIL:WORD,DESTINFO:BYTE
EXTRN BATHAND:WORD,RESSEG:WORD,TPA:WORD,SWITCHAR:BYTE
EXTRN BYTCNT:WORD,COMBUF:BYTE,DIRBUF:BYTE,CHARBUF:BYTE
IF KANJI
EXTRN KPARSE:BYTE
ENDIF
TRANSPACE ENDS
TRANCODE SEGMENT PUBLIC BYTE
ASSUME CS:TRANGROUP,DS:NOTHING,ES:NOTHING,SS:NOTHING
IF KANJI
EXTRN TESTKANJ:NEAR
ENDIF
EXTRN CERROR:NEAR,UPCONV:NEAR,PIPEERRSYN:NEAR,SETREST1:NEAR
EXTRN SWITCH:NEAR,SETREST1:NEAR,BATCLOSE:NEAR,MOVE_NAME:NEAR
EXTRN FIND_PROMPT:NEAR,FIND_PATH:NEAR,DELETE_PATH:NEAR
EXTRN STORE_CHAR:NEAR,SCAN_DOUBLE_NULL:NEAR,SCASB2:NEAR
EXTRN PRINT_DRIVE:NEAR,SAVUDIR:NEAR,CRLF2:NEAR,PAUSE:NEAR
PUBLIC PRINT_B,PRINT_G,DISPSIZE,GETNUM,OUTBYTE
PUBLIC DELIM,OUT,OUT2,SETPATH,PATHCRUNCH
PUBLIC CRPRINT,SCANOFF,FCB_TO_ASCZ
PUBLIC PRINT_L,PATH,PATHCHRCMP,PRINT_ESC,PRINT_BACK
PUBLIC PRINT_EQ,PRINT,ZPRINT,PRINT_PROMPT
PUBLIC DISP32BITS,ERROR_PRINT,ERROR_OUTPUT
PUBLIC FREE_TPA,ALLOC_TPA,PRESCAN,GETBATBYT
FREE_TPA:
ASSUME DS:TRANGROUP,ES:NOTHING
PUSH ES
MOV ES,[TPA]
MOV AH,DEALLOC
INT int_command ; Make lots of free memory
POP ES
return
ALLOC_TPA:
ASSUME DS:TRANGROUP,ES:RESGROUP
MOV BX,0FFFFH ; Re-allocate the transient
MOV AH,ALLOC
INT int_command
MOV AH,ALLOC
INT int_command
MOV [LTPA],AX ; Re-compute evrything
MOV [TPA],AX
MOV BX,AX
MOV AX,CS
SUB AX,BX
MOV DX,16
MUL DX
OR DX,DX
JZ SAVSIZ2
MOV AX,-1
SAVSIZ2:
MOV [BYTCNT],AX
return
PRESCAN: ; Cook the input buffer
ASSUME DS:TRANGROUP,ES:TRANGROUP
XOR CX,CX
MOV ES,[RESSEG]
ASSUME ES:RESGROUP
MOV SI,OFFSET TRANGROUP:COMBUF+2
MOV DI,SI
CountQuotes:
LODSB ; get a byte
CMP AL,22h ; is it a quote?
JNZ CountEnd ; no, try for end of road
INC CH ; bump count
JMP CountQuotes ; go get next char
CountEnd:
CMP AL,13 ; end of road?
JNZ CountQuotes ; no, go back for next char
IF KANJI
PUSH CX ; save count
MOV SI,DI ; get back beginning of buffer
KanjiScan:
LODSB ; get a byte
CALL TestKanj ; is it a leadin byte
JZ KanjiQuote ; no, check for quotes
MOV AH,AL ; save leadin
LODSB ; get trailing byte
CMP AX,8140h ; is it Kanji space
JNZ KanjiScan ; no, go get next
MOV [SI-2],2020h ; replace with spaces
JMP KanjiScan ; go get next char
KanjiQuote:
CMP AL,22h ; beginning of quoted string
JNZ KanjiEnd ; no, check for end
DEC CH ; drop count
JZ KanjiScan ; if count is zero, no quoting
KanjiQuoteLoop:
LODSB ; get next byte
CMP AL,22h ; is it another quote
JNZ KanjiQuoteLoop ; no, get another
DEC CH ; yes, drop count
JMP KanjiScan ; go get next char
KanjiEnd:
CMP AL,13 ; end of line character?
JNZ KanjiScan ; go back to beginning
POP CX ; get back original count
ENDIF
MOV SI,DI ; restore pointer to begining
PRESCANLP:
LODSB
IF KANJI
CALL TESTKANJ
JZ NOTKANJ6
MOV [DI],AL
INC DI ; fake STOSB into DS
LODSB ; grab second byte
MOV [DI],AL ; fake stosb into DS
INC DI
INC CL
INC CL
JMP PRESCANLP
NOTKANJ6:
ENDIF
CMP AL,22H ; " character
JNZ TRYGREATER
DEC CH
JZ TRYGREATER
QLOOP:
MOV [DI],AL
INC DI
INC CL
LODSB
CMP AL,22H ; " character
JNZ QLOOP
DEC CH
TRYGREATER:
CMP AL,'>'
JNZ NOOUT
CMP BYTE PTR [SI],'>'
JNZ NOAPPND
LODSB
INC [RE_OUT_APP] ; Flag >>
NOAPPND:
CALL SCANOFF
CMP AL,0DH
JNZ GOTREOFIL
MOV WORD PTR [RE_OUTSTR],09H ; Cause an error later
JMP SHORT PRESCANEND
GOTREOFIL:
PUSH DI
MOV DI,OFFSET RESGROUP:RE_OUTSTR
SETREOUTSTR: ; Get the output redirection name
LODSB
CMP AL,0DH
JZ GOTRESTR
CALL DELIM
JZ GOTRESTR
CMP AL,[SWITCHAR]
JZ GOTRESTR
STOSB ; store it into resgroup
JMP SHORT SETREOUTSTR
NOOUT:
CMP AL,'<'
JNZ CHKPIPE
CALL SCANOFF
CMP AL,0DH
JNZ GOTREIFIL
MOV WORD PTR [RE_INSTR],09H ; Cause an error later
JMP SHORT PRESCANEND
GOTREIFIL:
PUSH DI
MOV DI,OFFSET RESGROUP:RE_INSTR
JMP SHORT SETREOUTSTR ; Get the input redirection name
CHKPIPE:
MOV AH,AL
CMP AH,'|'
JNZ CONTPRESCAN
INC [PIPEFLAG]
CALL SCANOFF
CMP AL,0DH
JZ PIPEERRSYNJ5
CMP AL,'|' ; Double '|'?
JNZ CONTPRESCAN
PIPEERRSYNJ5:
PUSH ES
POP DS ; DS->RESGROUP
JMP PIPEERRSYN
GOTRESTR:
XCHG AH,AL
CMP BYTE PTR ES:[DI-1],':' ; Trailing ':' OK on devices
JNZ NOTTRAILCOL
DEC DI ; Back up over trailing ':'
NOTTRAILCOL:
XOR AL,AL
STOSB ; NUL terminate the string
POP DI ; Remember the start
CONTPRESCAN:
MOV [DI],AH ; "delete" the redirection string
INC DI
CMP AH,0DH
JZ PRESCANEND
INC CL
JMP PRESCANLP
PRESCANEND:
CMP [PIPEFLAG],0
JZ ISNOPIPE
MOV DI,OFFSET RESGROUP:PIPESTR
MOV [PIPEPTR],DI
MOV SI,OFFSET TRANGROUP:COMBUF+2
CALL SCANOFF
PIPESETLP: ; Transfer the pipe into the resident pipe buffer
LODSB
STOSB
CMP AL,0DH
JNZ PIPESETLP
ISNOPIPE:
MOV [COMBUF+1],CL
CMP [PIPEFLAG],0
PUSH CS
POP ES
return
ASSUME DS:TRANGROUP,ES:TRANGROUP
PATHCHRCMP:
CMP [SWITCHAR],'/'
JZ NOSLASHT
CMP AL,'/'
retz
NOSLASHT:
CMP AL,'\'
return
PATHCRUNCH:
; Drive taken from FCB
; DI = Dirsave pointer
;
; Zero set if path dir, CHDIR to this dir, FCB filled with ?
; NZ set if path/file, CHDIR to file, FCB has file (parsed fill ' ')
; [DESTTAIL] points to parse point
; Carry set if no CHDIRs worked, FCB not altered.
; DESTISDIR set non zero if PATHCHRs in path (via SETPATH)
MOV DL,DS:[FCB]
CALL SAVUDIR
CALL SETPATH
TEST [DESTINFO],2
JNZ TRYPEEL ; If ? or * cannot be pure dir
MOV AH,CHDIR
INT int_command
JC TRYPEEL
CALL SETREST1
MOV AL,"?" ; *.* is default file spec if pure dir
MOV DI,5DH
MOV CX,11
REP STOSB
XOR AL,AL ; Set zero
return
TRYPEEL:
MOV SI,[PATHPOS]
DEC SI ; Point at NUL
MOV AL,[SI-1]
IF KANJI
CMP [KPARSE],0
JNZ DELSTRT ; Last char is second KANJI byte, might be '\'
ENDIF
CALL PATHCHRCMP
JZ PEELFAIL ; Trailing '/'
IF KANJI
DELSTRT:
MOV CX,SI
MOV SI,DX
PUSH DX
DELLOOP:
CMP SI,CX
JZ GOTDELE
LODSB
CALL TESTKANJ
JZ NOTKANJ8
INC SI
JMP DELLOOP
NOTKANJ8:
CALL PATHCHRCMP
JNZ DELLOOP
MOV DX,SI
DEC DX
JMP DELLOOP
GOTDELE:
MOV SI,DX
POP DX
CMP SI,DX
JZ BADRET
MOV CX,SI
MOV SI,DX
DELLOOP2: ; Set value of KPARSE
CMP SI,CX
JZ KSET
MOV [KPARSE],0
LODSB
CALL TESTKANJ
JZ DELLOOP2
INC SI
INC [KPARSE]
JMP DELLOOP2
KSET:
ELSE
DELLOOP:
CMP SI,DX
JZ BADRET
MOV AL,[SI]
CALL PATHCHRCMP
JZ TRYCD
DEC SI
JMP SHORT DELLOOP
ENDIF
TRYCD:
CMP BYTE PTR [SI+1],'.'
JZ PEELFAIL ; If . or .., pure cd should have worked
mov al,[si-1]
CMP al,DRVCHAR ; Special case dDRVCHAR,DIRCHARfile
JZ BADRET
IF KANJI
CMP [KPARSE],0
JNZ NOTDOUBLESL ; Last char is second KANJI byte, might be '\'
ENDIF
CALL PATHCHRCMP
JNZ NOTDOUBLESL
PEELFAIL:
STC ; //
return
NOTDOUBLESL:
MOV BYTE PTR [SI],0
MOV AH,CHDIR
INT int_command
JNC CDSUCC
return
BADRET:
MOV AL,[SI]
CALL PATHCHRCMP ; Special case 'DIRCHAR'file
STC
retnz
XOR BL,BL
XCHG BL,[SI+1]
MOV AH,CHDIR
INT int_command
retc
MOV [SI+1],BL
CDSUCC:
CALL SETREST1
INC SI ; Reset zero
MOV [DESTTAIL],SI
MOV DI,FCB
MOV AX,(PARSE_FILE_DESCRIPTOR SHL 8) OR 02H ; Parse with default drive
INT int_command
return
DISPSIZE:
MOV SI,WORD PTR[DIRBUF+29+7]
MOV DI,WORD PTR[DIRBUF+31+7]
DISP32BITS:
; Prints the 32-bit number DI:SI on the console in decimal. Uses a total
; of 9 digit positions with leading blanks.
XOR AX,AX
MOV BX,AX
MOV BP,AX
MOV CX,32
CONVLP:
SHL SI,1
RCL DI,1
XCHG AX,BP
CALL CONVWRD
XCHG AX,BP
XCHG AX,BX
CALL CONVWRD
XCHG AX,BX
ADC AL,0
LOOP CONVLP
; Conversion complete. Print 9-digit number.
MOV DI,OFFSET TRANGROUP:CHARBUF
MOV CX,1810H ; Allow leading zero blanking for 8 digits
XCHG DX,AX
CALL DIGIT
XCHG AX,BX
CALL OUTWORD
XCHG AX,BP
CALL OUTWORD
XOR AX,AX
STOSB
MOV DX,OFFSET TRANGROUP:CHARBUF
JMP ZPRINT
OUTWORD:
PUSH AX
MOV DL,AH
CALL OUTBYTE
POP DX
OUTBYTE:
MOV DH,DL
SHR DL,1
SHR DL,1
SHR DL,1
SHR DL,1
CALL DIGIT
MOV DL,DH
DIGIT:
AND DL,0FH
JZ BLANKZER
MOV CL,0
BLANKZER:
DEC CH
AND CL,CH
OR DL,30H
SUB DL,CL
MOV AL,DL
STOSB
return
CONVWRD:
ADC AL,AL
DAA
XCHG AL,AH
ADC AL,AL
DAA
XCHG AL,AH
return
GETBATBYT:
; Get one byte from the batch file and return it in AL. End-of-file
; returns <CR> and ends batch mode. DS must be set to resident segment.
; AH, CX, DX destroyed.
ASSUME DS:RESGROUP
ADD WORD PTR [BATLOC],1 ; Add one to file location
ADC WORD PTR [BATLOC+2],0
PUSH BX
MOV DX,OFFSET RESGROUP:BATBYT
MOV BX,[BATHAND]
MOV AH,READ
MOV CX,1
INT int_command ; Get one more byte from batch file
POP BX
MOV CX,AX
JC BATEOF
JCXZ BATEOF
MOV AL,[BATBYT]
CMP AL,1AH
retnz
BATEOF:
PUSH ES
MOV ES,[BATCH] ; Turn off batch
MOV AH,DEALLOC
INT int_command ; free up the batch piece
POP ES
MOV [BATCH],0 ; AFTER DEALLOC in case of ^C
CALL BATCLOSE
MOV AL,0DH ; If end-of-file, then end of line
CMP [SINGLECOM],0FFF0H ; See if we need to set SINGLECOM
JNZ NOSETSING2
MOV [SINGLECOM],-1 ; Cause termination
NOSETSING2:
MOV [ECHOFLAG],1
return
ASSUME DS:TRANGROUP
SCANOFF:
LODSB
CALL DELIM
JZ SCANOFF
DEC SI ; Point to first non-delimiter
return
DELIM:
CMP AL," "
retz
CMP AL,"="
retz
CMP AL,","
retz
CMP AL,";"
retz
CMP AL,9 ; Check for TAB character
return
PRINT_PROMPT:
PUSH DS
PUSH CS
POP DS ; MAKE SURE DS IS IN TRANGROUP
PUSH ES
CALL FIND_PROMPT ; LOOK FOR PROMPT STRING
JC PP0 ; CAN'T FIND ONE
CMP BYTE PTR ES:[DI],0
JNZ PP1
PP0:
CALL PRINT_DRIVE ; USE DEFAULT PROMPT
MOV AL,SYM
CALL OUT
JMP SHORT PP5
PP1:
MOV AL,ES:[DI] ; GET A CHAR
INC DI
OR AL,AL
JZ PP5 ; NUL TERMINATED
CMP AL,"$" ; META CHARACTER?
JZ PP2 ; NOPE
PPP1:
CALL OUT
JMP PP1
PP2:
MOV AL,ES:[DI]
INC DI
MOV BX,OFFSET TRANGROUP:PROMPT_TABLE-3
OR AL,AL
JZ PP5
PP3:
ADD BX,3
CALL UPCONV
CMP AL,[BX]
JZ PP4
CMP BYTE PTR [BX],0
JNZ PP3
JMP PP1
PP4:
PUSH ES
PUSH DI
PUSH CS
POP ES
CALL [BX+1]
POP DI
POP ES
JMP PP1
PP5:
POP ES ; RESTORE SEGMENTS
POP DS
return
PRINT_BACK:
MOV DX,OFFSET TRANGROUP:DBACK
JMP ZPRINT
PRINT_EQ:
MOV AL,"="
JMP SHORT OUTV
PRINT_ESC:
MOV AL,1BH
JMP SHORT OUTV
PRINT_G:
MOV AL,">"
JMP SHORT OUTV
PRINT_L:
MOV AL,"<"
JMP SHORT OUTV
PRINT_B:
MOV AL,"|"
OUTV:
JMP OUT
SETPATH:
; Get an ASCIZ argument from the unformatted parms
; DESTISDIR set if pathchars in string
; DESTINFO set if ? or * in string
MOV SI,80H
LODSB
XOR AH,AH
MOV [PATHCNT],AX
MOV [PATHPOS],SI
GETPATH:
MOV [DESTINFO],0
MOV [DESTISDIR],0
MOV SI,[PATHPOS]
MOV CX,[PATHCNT]
MOV DX,SI
JCXZ PATHDONE
PUSH CX
PUSH SI
CALL SWITCH
MOV [PATHSW],AX
POP BX
SUB BX,SI
POP CX
ADD CX,BX
MOV DX,SI
SKIPPATH:
IF KANJI
MOV [KPARSE],0
SKIPPATH2:
ENDIF
JCXZ PATHDONE
DEC CX
LODSB
IF KANJI
CALL TESTKANJ
JZ TESTPPSEP
DEC CX
INC SI
INC [KPARSE]
JMP SKIPPATH2
TESTPPSEP:
ENDIF
CALL PATHCHRCMP
JNZ TESTPMETA
INC [DESTISDIR]
TESTPMETA:
CMP AL,'?'
JNZ TESTPSTAR
OR [DESTINFO],2
TESTPSTAR:
CMP AL,'*'
JNZ TESTPDELIM
OR [DESTINFO],2
TESTPDELIM:
CALL DELIM
JZ PATHDONEDEC
CMP AL,[SWITCHAR]
JNZ SKIPPATH
PATHDONEDEC:
DEC SI
PATHDONE:
XOR AL,AL
XCHG AL,[SI]
INC SI
CMP AL,0DH
JNZ NOPSTORE
MOV [SI],AL ;Don't loose the CR
NOPSTORE:
MOV [PATHPOS],SI
MOV [PATHCNT],CX
return
PGETARG:
MOV SI,80H
LODSB
OR AL,AL
retz
CALL PSCANOFF
CMP AL,13
return
PSCANOFF:
LODSB
CALL DELIM
JNZ PSCANOFFD
CMP AL,';'
JNZ PSCANOFF ; ';' is not a delimiter
PSCANOFFD:
DEC SI ; Point to first non-delimiter
return
PATH:
CALL FIND_PATH
CALL PGETARG ; Pre scan for arguments
JZ DISPPATH ; Print the current path
CALL DELETE_PATH ; DELETE ANY OFFENDING NAME
CALL SCAN_DOUBLE_NULL
CALL MOVE_NAME ; MOVE IN PATH=
CALL PGETARG
CMP AL,';' ; NUL path argument?
JZ GOTPATHS
PATHSLP: ; Get the user specified path
LODSB
CMP AL,0DH
JZ GOTPATHS
IF KANJI
CALL TESTKANJ
JZ NOTKANJ2
CALL STORE_CHAR
LODSB
CALL STORE_CHAR
JMP SHORT PATHSLP
NOTKANJ2:
ENDIF
CALL UPCONV
CMP AL,';' ; ';' not a delimiter on PATH
JZ NOTDELIM
CALL DELIM
JZ GOTPATHS
NOTDELIM:
CALL STORE_CHAR
JMP SHORT PATHSLP
GOTPATHS:
XOR AX,AX
STOSW
return
DISPPATH:
CALL PRINT_PATH
CALL CRLF2
return
PRINT_PATH:
CMP BYTE PTR ES:[DI],0
JNZ PATH1
PATH0:
MOV DX,OFFSET TRANGROUP:NULPATH
PUSH CS
POP DS
JMP PRINT
PATH1:
PUSH ES
POP DS
SUB DI,5
MOV DX,DI
ASSUME DS:RESGROUP
CALL SCASB2 ; LOOK FOR NUL
CMP CX,0FFH
JZ PATH0
JMP ZPRINT
FCB_TO_ASCZ: ; Convert DS:SI to ASCIZ ES:DI
MOV CX,8
MAINNAME:
LODSB
CMP AL,' '
JZ SKIPSPC
STOSB
SKIPSPC:
LOOP MAINNAME
LODSB
CMP AL,' '
JZ GOTNAME
MOV AH,AL
MOV AL,'.'
STOSB
XCHG AL,AH
STOSB
MOV CL,2
EXTNAME:
LODSB
CMP AL,' '
JZ GOTNAME
STOSB
LOOP EXTNAME
GOTNAME:
XOR AL,AL
STOSB
return
GETNUM:
CALL INDIG
retc
MOV AH,AL ; Save first digit
CALL INDIG ; Another digit?
JC OKRET
AAD ; Convert unpacked BCD to decimal
MOV AH,AL
OKRET:
OR AL,1
return
INDIG:
MOV AL,BYTE PTR[SI]
SUB AL,"0"
retc
CMP AL,10
CMC
retc
INC SI
return
OUT2: ; Output binary number as two ASCII digits
AAM ; Convert binary to unpacked BCD
XCHG AL,AH
OR AX,3030H ; Add "0" bias to both digits
CMP AL,"0" ; Is MSD zero?
JNZ NOSUP
SUB AL,BH ; Suppress leading zero if enabled
NOSUP:
MOV BH,0 ; Disable zero suppression
STOSW
return
OUT:
; Print char in AL without affecting registers
XCHG AX,DX
PUSH AX
CALL OUT_CHAR
POP AX
XCHG AX,DX
return
OUT_CHAR:
PUSH DS
PUSH DX
PUSH CX
PUSH BX
PUSH AX
PUSH CS
POP DS
MOV BX,OFFSET TRANGROUP:CHARBUF
MOV [BX],DL
MOV DX,BX
MOV BX,1
MOV CX,BX
MOV AH,WRITE
INT int_command
POP AX
POP BX
POP CX
POP DX
POP DS
return
ERROR_PRINT:
PUSH AX
PUSH BX
MOV AL,"$"
MOV BX,2 ;STD ERROR
JMP SHORT STRING_OUT
CRPRINT:
PUSH AX
MOV AL,13
JMP SHORT Z$PRINT
PRINT: ;$ TERMINATED STRING
PUSH AX
MOV AL,"$"
JMP SHORT Z$PRINT
ZPRINT:
PUSH AX
XOR AX,AX ;NUL TERMINATED STRING
Z$PRINT:
PUSH BX
MOV BX,1 ;STD CON OUT
;
; output string terminated by AL to handle BX, DS:DX points to string
;
STRING_OUT:
PUSH CX
PUSH DI
MOV DI,DX
MOV CX,-1
PUSH ES
PUSH DS
POP ES
REPNZ SCASB ; LOOK FOR TERMINATOR
POP ES
NEG CX
DEC CX
DEC CX
;
; WRITE CHARS AT DS:DX TO HANDLE IN BX, COUNT IN CX
;
MOV AH,WRITE
INT int_command
JC ERROR_OUTPUT
CMP AX,CX
JNZ ERROR_OUTPUT
POP DI
POP CX
POP BX
POP AX
return
ERROR_OUTPUT:
PUSH CS
POP DS
ASSUME DS:TRANGROUP
MOV ES,[RESSEG]
ASSUME ES:RESGROUP
MOV DX,OFFSET TRANGROUP:NOSPACE
CMP [PIPEFLAG],0
JZ GO_TO_ERROR
MOV [PIPEFLAG],0
MOV DX,OFFSET TRANGROUP:PIPEEMES
GO_TO_ERROR:
JMP CERROR
TRANCODE ENDS
END