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Uade0D.asm
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;.OPT
;UADE0D;FILE > Uade0D
;.TTL
;Fileserver file UADE0D
.UADE0D
;********************************
;* DIRMAN UTILITIES *
;********************************
;******** GETDIR ROUTINE *********
;GETDIR: LOADS THE DIRECTORY SPECIFIED BY A FILE TITLE.
;EXIT: A = RC
;DIRSTA = ADDR OF DIR IN MEMORY
;IF TITLE = <root><terminator> OR
;TITLE = <terminator>
;THEN load 'current dir' #set by INITDV#
;ELSE call RETENT #retrieve entry#
;check that entry is for a directory
;DIRSIN := SIN of current entry
;load new current directory
;FI
;NOTE that GETDIR in cases where an error occurs
;will UNLOCK anything that it loaded.
.GETDRD
{
JSR TSTROT;<root>$<terminator>?
BEQ GETDRY
JSR TSTERM;<terminator>$?
BEQ GETDRY
INY
LDA (NAMPTR),Y
DEY
CMP #TERMIN
BNE GETDRF
LDA (NAMPTR),Y
JSR TSTSYM
BEQ GETDRY
.GETDRF
BIT DIRFLG
BMI GETDRE
JSR RETENT
JMP GETDRC
.GETDRE
JSR RETEND
.GETDRC
BNE GETDRZ
JSR TSTPSP;TEST TXTNAM STARTS WITH '^' FOLLOWED BY SPACE
BEQ GETDRX;YES
JSR TSTDIR;SEE IF ITS A DIR-TSTDIR WILL UNLOCK IF REQD.
BNE GETDRZ
JSR SETSIN
.GETDRX
JSR UNLOCK
.GETDRY
JSR LOADDR
.GETDRZ
RTS
}
;CHKTIT: CHECKS THE SYNTAX OF A FILE TITLE.
;ENTRY:
;NAMPTR => PTR TO FILE TITLE,
;TO BE RECOGNISED.
;EXIT :
;A = RC (0=>SUCCESS)
;LASTNM => ADDRESS OF THE LAST
;TEXT NAME IN THE FILE TITLE.
;<file title>::=$<title component>|<file name>
;<file name)::= <text name><title component>
;<title component>::=<terminator>|<separator><file name>
.CHKTIT
{
LDA DIRWC
AND #&C3;WAS &C0
STA DIRWC;top bits only
LDY #0;Y:=PTR TO CHAR
STY DIRTMP;counter for loop here
JSR SETLST;SETUP LASTNM
LDA (NAMPTR),Y
CMP #ROOT
BEQ CHKTTB
JSR TSTSYM
BNE CHKTTH
;SEE IF ITS A <file name>
.CHKTTB
INY
LDA (NAMPTR),Y
CMP #SEPART;IS IT A <separator>
BEQ CHKTTG
CMP #TERMIN;IS IT A <terminator>
BEQ CHKTTA
BNE CHKTTY
;TRY TO RECOGNISE <file name>
.CHKTTG
INY
.CHKTTH
STY DIRTMP + 1;save offset
JSR SETLST;SETUP LASTNM
.CHKTTJ
JSR CHKTEX;RECOGNISE <text name>
BNE CHKTTZ
LDA (NAMPTR),Y
CMP #TERMIN
BNE CHKTTM
INC DIRTMP
LDX DIRTMP
CPX #2
BEQ CHKTTA;match here
LDA DIRWC
AND #&3F
BIT DIRWC
BVC CHKTTC
ORA #&80
.CHKTTC
STA DIRWC
LDY DIRTMP + 1;restore Y
JMP CHKTTJ;do loop again
.CHKTTA
LDA #0;RC := 0
RTS
.CHKTTM
CMP #SEPART
BEQ CHKTTG
.CHKTTY
LDA #DRERRA;RC:=INVALID SEPARATOR
.CHKTTZ
RTS
;CHKTEX: RTN TO RECOGNISE <text name>
.CHKTEX
LDX #NAMLNT;X:=MAX NO. OF CHARS IN <text name>
.CHKTXA
LDA (NAMPTR),Y
CMP #&21
BCC CHKTXX
CMP #&7F
BCS CHKTXX;Nope => error
BIT DIRWC
BPL CHKTLA
CMP #'*'
BEQ CHKTXV
CMP #'#'
BEQ CHKTXV
.CHKTLA
CMP #'"';** 21/9/83 **
BEQ CHKTXX
CMP #':'
BEQ CHKTXX
CMP #'*'
BEQ CHKTXX
CMP #'.'
BEQ CHKTXX
CMP #':'
BEQ CHKTXX
CMP #'#'
BEQ CHKTXX;Nope => error
CMP #'$'
BEQ CHKTXX;** 18/9/84 **
.CHKTXV
INY
DEX
BNE CHKTXA
.CHKTXX
LDA #0
CPX #NAMLNT;TEST LENGTH OF <text name>
BNE CHKTXZ
LDA #DRERRA;INVALID TEXT NAME
.CHKTXZ
TAX ;SET FLAGS
RTS
}
.SETLST
TYA ;RTN TO SETUP LASTNM
CLC
ADC NAMPTR
STA LASTNM
LDA NAMPTR + 1
ADC #0
STA LASTNM + 1
RTS
;FNDTEX: SEARCH CUR DIR FOR NAME IN TXTNAM.
;N.B. DIR ENTRIES ARE SORTED,
;KEY=<file title>.
;ENTRY: DIRSTA=STORE ADDR OF DIR TO BE SEARCHED.
;EXIT : A=0 => NAME FOUND
;PREVEN => PTR TO PREVIOUS ENTRY
;CRNTEN => PTR TO CURRENT ENTRY
.FNDTEX
{
JSR INTPRE;PREVEN := addr of 1st entry
LDA #0
STA WILD1;flag for wild cards
.FNDTXA
JSR SETCRN
BEQ FNDTXB;end of dir ?
LDY #DRTITL
LDX #0
JSR FNDM1;look up name with wild cards
BCS FNDTXE
PHP
LDA WILD1
BNE FNDTXP
PLP
BMI FNDTXB
PHP
.FNDTXP
PLP
.*FNDTEZ
JSR MOVCRN
JMP FNDTXA;repeat until end
.FNDTXB
LDA #DRERRC
RTS
.FNDTXE
LDA #0
RTS ;exit ok
.FNDM1
LDA TXTNAM,X
CMP #'*'
BNE FNDM4
INC WILD1
INX
.FNDM6
TXA
PHA
TYA
PHA
JSR FNDM1
PLA
TAY
PLA
TAX
BCS FNDMR
INY
CPY #12
BCC FNDM6
.FNDMT
LDA TXTNAM,X
CMP #&20
BEQ FNDMR
CMP #&0D
BEQ FNDMR
CPX #10;returns C=1 at end-of-name
RTS
.FNDM4
CPY #12
BCS FNDMT
JSR CPCHAR
BNE FNDMF
INX
INY
BNE FNDM1
.FNDMF
CLC
.FNDMR
RTS
.CPCHAR
CMP #'#'
BEQ CPRET
JSR CAPS
PHA
LDA (CRNTEN),Y
JSR CAPS
STA WILD2
PLA
CMP WILD2
RTS
.CPRET
INC WILD1;set flag
LDA (CRNTEN),Y;must NOT match a space
CMP #SPACE
PHP
PLA
EOR #2;flip Z flag
PHA
PLP ;return Z=1 if not a space
RTS
.CAPS
STA WILD2
CMP #'A'
BCC CAPSL1
CMP #'z' + 1
BCS CAPSL1
CMP #'Z' + 1
BCC CAPSL3
CMP #'a'
BCS CAPSL2
.CAPSL1
SEC
BCS CAPSL3
.CAPSL2
CLC
.CAPSL3
LDA #&F9
ROR A
ROR A
ROR A
AND WILD2
RTS
}
.INTPRE
LDA DIRSTA;PREVEN := DIRSTA
STA PREVEN
LDA DIRSTA + 1
STA PREVEN + 1
RTS
.MOVCRN
LDA CRNTEN;PREVEN := CRNTEN
STA PREVEN
LDA CRNTEN + 1
STA PREVEN + 1
RTS
.SETCRN
CLC ;RTN TO SETUP CRNTEN (CURRENT ENTRY) PTR
LDY #DRLINK
LDA (PREVEN),Y
ADC DIRSTA
STA CRNTEN
INY
LDA (PREVEN),Y
ADC DIRSTA + 1
STA CRNTEN + 1
LDY #0
LDA (PREVEN),Y
INY
ORA (PREVEN),Y;IF [PREVEN] = 0 THEN A:=0
RTS
;INITDV: INITIALISES SEVERAL DIRMAN VARIABLES.
;ENTRY:
;ARGB = LS
;ARGC = MS(PTR TO USERINFO)
;ARGD = LS
;ARGE = MS(PTR TO FILE TITLE)
;FUNCTION:-
;DRUSIN => PTR TO USERINFO
;MCNUMB => MACHINE NO OF CALLER
;NAMPTR => PTR TO FILE TITLE
;DRDISC => SELECTED DISC NUMBER
;DIRACC => IF CHAR[0] OF FILE TITLE = ROOT
;THEN IF SYST PRIVILEGED
;THEN OWNER ACCESS
;ELSE ANYBODY ACCESS
;FI
;ELSE ACCESS TO CURRENTLY SELECTED DIR
;FI ! TYPDIR
;DIRSIN => IF DISC NAME PRESENT
;THEN SIN OF ROOT DIRECTORY ON NAMED DISC
;ELIF CHAR[0] OF FILE TITLE = ROOT
;THEN SIN OF ROOT DIRECTORY
;ELSE SIN OF CURRENTLY SELECTED DIR
;FI
;TDATE => IF ROOT DIR IMPLIED
;THEN DATE ROOT DIR CREATED (SEE MAPTB)
;FI
;DIRSTT := 0 START BLK NO
;EXIT: A = RC
.INITDV
{
LDY #ARGB
LDA (ARGPTR),Y
STA DRUSIN
INY
LDA (ARGPTR),Y
STA DRUSIN + 1;DRUSIN:=PTR TO USER INFO
INY
LDA (ARGPTR),Y
STA NAMPTR
INY
LDA (ARGPTR),Y
STA NAMPTR + 1;NAMPTR := PTR TO FILE TITLE
LDY #UTMCNO
LDA (DRUSIN),Y
STA MCNUMB
INY
LDA (DRUSIN),Y
STA MCNUMB + 1
INY
LDA (DRUSIN),Y
STA MCNUMB + 2;MCNUMB := MACHINE NO OF CALLER
;PRECEEDED BY A DISC NAME?
LDY #0
LDA (NAMPTR),Y
CMP #DISCIN;DISC NAME PRESENT??
BEQ INTSTR;YES
JMP INTDVC
.INTSTR
LDX #DNAMLN;X:=MAX LENGTH OF DISC NAME
LDA #LO(DRDSNM)
STA MOVTO
LDA #HI(DRDSNM)
STA MOVTO + 1;MOVTO:=PTR TO DRDSNM BUFFER
INC NAMPTR
BNE INTDVF
INC NAMPTR + 1;NAMPTR+:=1
.INTDVF
LDA (NAMPTR),Y
.INTDVA
STA (MOVTO),Y;COPY DISC NAME INTO DRDSNM
CMP #TERMIN;TERMINATOR?
BEQ INTDBA
CMP #SEPART;SEPARATOR?
BNE INTDVB
LDA #TERMIN
STA (MOVTO),Y;TERMINATE DISC NAME
INY
LDA (NAMPTR),Y
CMP #'^';PARENT?
BEQ INTDVG
CMP #'&';USER ROOT?
BEQ INTDVG
CMP #'%';USER LIB?
BNE INTDBA
.INTDVG
INY
LDA (NAMPTR),Y
DEY
CMP #TERMIN
BEQ INTDVR;ERROR
CMP #SEPART
BEQ INTDVR;ERROR
BNE INTDBA
.INTDVB
INY
LDA (NAMPTR),Y
DEX
BNE INTDVA
LDA #TERMIN
STA (MOVTO),Y;TERMINATE DISC NAME
LDA (NAMPTR),Y
CMP #TERMIN
BEQ INTDBA
CMP #SEPART
BEQ INTDBC
.INTDVR
LDA #DRERRA;BAD FILE TITLE
.INTDVX
RTS
.INTDBC
INY
.INTDBA
CLC
TYA
ADC NAMPTR
STA NAMPTR
BCC INTDBD
INC NAMPTR + 1;NAMPTR:=PTR TO FILE TITLE
;GET DISC NUMBER OF NAMED DISC
.INTDBD
LDA #&A
JSR SETRTN
INY
LDA #LO(DRDSNM)
STA (NEWARG),Y
INY
LDA #HI(DRDSNM)
STA (NEWARG),Y;PTR TO DISC NAME
JSR MAPMAN;MAPMAN.DISCNAME->DISCNUMB
BNE INTDVX
LDY #ARGB
LDA (NEWARG),Y
STA DRDISC
INY
LDA (NEWARG),Y
STA DRDISC + 1
JMP INTDVD
;WAS ROOT DIR SPECIFIED
.INTDVC
JSR TSROOT;IS ROOT DIR SPECIFIED?
BNE INTDV3
LDY #UTDISC
LDA (DRUSIN),Y
STA DRDISC
INY
LDA (DRUSIN),Y
STA DRDISC + 1;DRDISC:=SELECTED DISC NUMBER
.INTDVD
LDA #(ANYBDY OR TYPDIR)
STA DIRACC;DIRACC:=ANYBDY!TYPDIR
LDY #UTPRIV
LDA (DRUSIN),Y
AND #SYSTPV
BEQ INTDVE
LDA #(OWNER OR TYPDIR)
STA DIRACC;DIRACC:=OWNER!TYPDIR
;GET SIN OF ROOT ON SELECTED DISC
.INTDVE
LDA #4;(SIN OF ROOT)
JSR STDSN2;PLACE DISC NO ON NEWARG STACK
JSR MAPMAN;CALL MAPMAN.SINOFROOT
BNE INTDVZ
LDY #ARGB
LDA (NEWARG),Y
STA DIRSIN
INY
LDA (NEWARG),Y
STA DIRSIN + 1
INY
LDA (NEWARG),Y
STA DIRSIN + 2;DIRSIN:=SIN OF ROOT
INY
LDA (NEWARG),Y
STA TDATE;TDATE:=DATE OF ROOT
INY
LDA (NEWARG),Y
STA TDATE + 1
JMP INTDVT
;USER'S ROOT
.INTDV1
LDA UMHUFD
BCS INTDV5;ALWAYS
;USER'S LIB
.INTDV2
LDA UMHLIB
BCS INTDV5;ALWAYS
;NOT ROOT, SO?
.INTDV3
INY
LDA (NAMPTR),Y
CMP #SEPART
BEQ INTDV4
CMP #TERMIN
BNE INTDVH
.INTDV4
DEY
LDA (NAMPTR),Y
CMP #'^';PARENT?
BEQ INTDV6
CMP #'&';USER'S ROOT?
BEQ INTDV1
CMP #'%';USER'S LIB?
BEQ INTDV2
;LOOK UP ACCESS, DISC NUMBER, & SIN OF SELECTED DIR
.INTDVH
LDY #UTHSLD;OFFSET OF HANDLE FOR SELECTED DIR
LDA (DRUSIN),Y;A:=HANDLE FOR SELECTED DIR
.INTDV5
JSR FNDHND;FIND HANDLE IN HANDTB
BNE INTDVZ
;CHECK THAT ITS A DIR
LDY #HTACC
LDA (HNDPTR),Y
AND #TYPDIR
BNE INTDVJ
LDA #DRERRD;OBJECT NOT A DIR
RTS
.INTDVJ
CLC
LDA HNDPTR;HNDPTR SETUP BY FNDHND
ADC #HTACC
STA MOVFRM
LDA HNDPTR + 1
ADC #0
STA MOVFRM + 1
LDA #LO(DIRACC)
STA MOVTO
LDA #HI(DIRACC)
STA MOVTO + 1
LDX #6;DIRACC,DRDISC,DIRSIN
JSR MOVE;COPY INFO FROM HANDTB INTO DIRMAN VARIABLES
.INTDVT
LDA #0
STA DIRSTT
STA DIRSTT + 1;DIRSTT:=0
.INTDVZ
RTS
;PARENT
.INTDV6
JSR INTDVH
LDY #UTDISC
LDA (DRUSIN),Y
STA DRDISC
INY
LDA (DRUSIN),Y
STA DRDISC + 1
JSR LDPAR;LOAD PARENT DIR
BNE INTDVZ
JSR UNLOCK
BEQ INTDVT
}
.LDDR
{
LDA #5
JSR SETRTN
JSR SETDIR
JSR MAPMAN;MAPMAN.SIZEINFO
BNE LDDRZ
LDY #ARGB
LDA (NEWARG),Y
STA DIRSZE
INY
LDA (NEWARG),Y
STA DIRSZE + 1;DIRSZE:=SIZE OF DIR IN BYTE
INY
LDA (NEWARG),Y
STA DIRSZE + 2
INY ;Y:=ARGE
LDA (NEWARG),Y
STA DIRBKS
INY
LDA (NEWARG),Y
STA DIRBKS + 1;DIRBKS:=NO OF BLOCKS USED BY DIR
LDA #0
STA DIRSTT
STA DIRSTT + 1;DIRSTT:=0(START ADDR IN DIR)
JSR SETDIR
LDA #1;STRMAN.DISC ADDR TO STORE ADDR
JSR SETRTN
JSR STRMAN
BNE LDDRZ
LDY #ARGB
LDA (NEWARG),Y
STA DIRSTA
STA DPTRLD
INY
LDA (NEWARG),Y
STA DIRSTA + 1
STA DPTRLD + 1;DPTRLD:=PTR TO 1ST BYTE OF DIR
LDA #0;RC:=0
.LDDRZ
RTS
}
.LOADDR
{
JSR LDDR;TRY AND LOAD THE DIR
BNE LOADRZ
;SEE IF LEADING AND TRAILING SEQUENCE NUMBERS MATCH
;IN THE PROCESS SETUP DPTRTR (PTR TO LAST BYTE OF DIR)
LDY #DRSQNO
LDA (DPTRLD),Y
TAX ;X:=LEADING SQ. NO.
SEC
LDA DPTRLD
SBC #1
STA DPTRTR
LDA DPTRLD + 1
SBC #0
STA DPTRTR + 1;DPTRTR:=DPTRLD-1
CLC
LDA DPTRTR
ADC DIRSZE
STA DPTRTR
LDA DPTRTR + 1
ADC DIRSZE + 1
STA DPTRTR + 1;DPTRTR:=PTR TO LAST BYTE OF DIR
TXA
LDY #0
CMP (DPTRTR),Y;A:=TRAILING SQ. NO.
BEQ LOADRY
LDA #DRERRB;BROKEN DIR
JMP UNLOCK
.LOADRY
LDY #ARGA
LDA (NEWARG),Y;RC
.LOADRZ
RTS
}
.SETDIR
LDA #LO(DRDISC);MOVE DISC NO->DIRBKS ONTO NEWARG STACK
STA MOVFRM
LDA #HI(DRDISC)
STA MOVFRM + 1
CLC
LDA NEWARG
ADC #ARGB
STA MOVTO
LDA NEWARG + 1
ADC #0
STA MOVTO + 1
LDX #9
JMP MOVE
.STAARG
LDA DIRSTA;MOVE DIRSTA ONTO ARG STACK FOR STRMAN
LDY #ARGB
STA (NEWARG),Y
STA GENPTR;SETUP GENPTR FOR MRKDRT RTN
LDA DIRSTA + 1
INY
STA (NEWARG),Y
STA GENPTR + 1
RTS
.UNLOCK
{
PHA
LDA #3;CALL STRMAN.UNLOCK
JSR SETRTN
JSR STAARG
JSR STRMAN
BEQ UNLKZ
JSR INTERR
.UNLKZ
PLA
RTS
}
.ENSRIT
LDA #2;CALL STRMAN.ENSURE FOR DIR
JSR SETRTN
JSR STAARG
JSR MRKDRT
LDY #ARGD
LDA #UNLKIT
STA (NEWARG),Y;ENSURE AND UNLOCK THE OBJECT
;NOW INC SEQ. NOS.
LDY #DRSQNO
LDA (DPTRLD),Y
TAX
INX
TXA ;A:=NEW SQ NO
STA (DPTRLD),Y;1ST SQ NO
LDY #0
STA (DPTRTR),Y;LST SQ NO
JMP STRMAN
;RETDIR: RETRIEVE DIR BEFORE LAST COMPONENT OF FILE TITLE.
;EXIT: A = RC
;NAMPTR = PTR TO LAST TEXT NAME.
;DIRSTA = ADDR OF DIR IN MEMORY
;FUNCTION: IF SYNTAX OF FILE TITLE OK
;THEN RETRIEVE PENULTIMATE DIR
;FI
.RETDIR
{
JSR CHKTIT;CHECK SYNTAX OF FILE TITLE
BNE RETDRZ
;** 11/4/84 **
;attempts to delete "$" fail in eyecatching manner
JSR ISLNAM
BNE RETDRA;ok if not EQ
JSR TSTROT;look for ROOT here
BEQ RETDRE
JSR TSTSYM
BNE RETDRA
JSR TSTCR1;FOLLOWED BY TERMINATOR?
BNE RETDRA
.RETDRE
LDA #DRERRC;'not found', well it cant be can it !
.RETDRX
RTS
.RETDRA
JSR LOADDR;LOAD CURRENT DIR
BNE RETDRX
;IF THE FIRST NAME=ROOT THEN WE HAVE TO ADJUST NAMPTR
JSR TSROOT;SEE IF FIRST NAME COMPONENT=ROOT
BEQ RETDRC
JSR TSTSYM
BNE RETDRB
INY
LDA (NAMPTR),Y
CMP #SEPART
BNE RETDRB
.RETDRC
CLC
LDA NAMPTR
ADC #2
STA NAMPTR
BCC RETDRB
INC NAMPTR + 1;NAMPTR+:=2
.RETDRB
JSR ISLNAM
BEQ RETDRY;BRANCH IF ARRIVED AT LAST TEXT NAME
;COPY NEXT TEXT NAME COMPONENT INTO TXTNAM
;& MOVE NAMPTR TO NEXT COMPONENT
JSR LOADTX
JSR TSTPSP;TEST TXTNAM STARTS WITH '^' FOLLOWED BY SPACE
BNE RETDRD;NO
JSR UNLOCK
JSR LDPAR;LOAD PARENT DIR
BEQ RETDRB
RTS
;CHECK DIR EXISTS
.RETDRD
JSR FNDTEX;SEARCH DIR FOR TEXT NAME
BNE RETDRU
;FIRST CHECK THAT ITS A DIR
.RETDRH
JSR ISDIR
BEQ RETDRJ
JSR FNDTEZ;try on next match
BEQ RETDRH
.RETDRU
JMP UNLOCK;unlock the entry
;NOW PREPARE FOR NEXT DIR TO BE LOADED, AND
;UNLOCK THE CURRENT ONE
.RETDRJ
JSR SETSIN;DIRSIN := SIN OF NEXT DIR TO BE LOADED
JSR UNLOCK;UNLOCK CURRENT DIR
JSR LOADDR
BNE RETDRZ
BEQ RETDRB
.RETDRY
LDA #0
.RETDRZ
RTS
}
.ISDIR
LDY #DRACCS
LDA (CRNTEN),Y;check type found
AND #TYPDIR
CMP #TYPDIR
RTS
.ISLNAM
{
LDA NAMPTR
CMP LASTNM
BNE ISLNAX
LDA NAMPTR + 1
CMP LASTNM + 1
.ISLNAX
RTS
}
.RETENT
{
JSR RETDIR;FIND APPROPRIATE DIR
BNE RETETZ
JSR LOADTX;COPY LAST TEXTNAME INTO TXTNAM
LDA #&02
BIT DIRWC
BEQ RETETA
JSR TSTPSP;TEST TXTNAM STARTS WITH '^' FOLLOWED BY SPACE
BNE RETETA;NO
JSR UNLOCK
JMP LDPAR;LOAD PARENT DIR
.RETETA
JSR FNDTEX;SEARCH FOR LAST TEXT NAME
BEQ RETETZ
.RETUNL
JSR UNLOCK
.RETETZ
RTS
.*RETEND
JSR RETENT
BNE RETETZ
JSR TSTPSP;TEST TXTNAM STARTS WITH '^' FOLLOWED BY SPACE
BEQ RETETZ
.RETEN1
JSR ISDIR
BEQ RETETZ
JSR FNDTEZ
BEQ RETEN1
BNE RETUNL
}
.TSTPSP;TEST TXTNAM STARTS WITH '^' FOLLOWED BY SPACE
{
LDA TXTNAM
CMP #'^'
BNE TSTPSA
LDA TXTNAM + 1
CMP #' '
.*LDPARX
.TSTPSA
RTS
}
.LDPAR;LOAD PARENT DIR
{
LDY #UTPRIV
LDA (DRUSIN),Y
AND #SYSTPV
BNE LDPARA;SYSTEM USER
;MCNUMB = MACHINE NUMBER
LDA UMHUFD
JSR FNDHND
BNE LDPARE;NOT FOUND
LDA #LO(DRDISC);DISC NO. OF CURRENT DIR
STA MOVFRM
LDA #HI(DRDISC)
STA MOVFRM+1
CLC
LDA HNDPTR
ADC #HTDISC
STA MOVTO
LDA HNDPTR+1
ADC #0
STA MOVTO+1