
	.TITLE	INSTALL TASK (INS...)

/

/ COPYRIGHT (C) 1975

/ DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASS.

/

/ THIS SOFTWARE IS FURNISHED UNDER A LICENSE FOR USE ONLY

/ ON A SINGLE COMPUTER SYSTEM AND MAY BE COPIED ONLY WITH

/ THE INCLUSION OF THE ABOVE COPYRIGHT NOTICE.  THIS

/ SOFTWARE, OR ANY OTHER COPIES THEREOF, MAY NOT BE PRO-

/ VIDED OR OTHERWISE MADE AVAILABLE TO ANY OTHER PERSON

/ EXCEPT FOR USE ON SUCH SYSTEM AND TO ONE WHO AGREES TO

/ THESE LICENSE TERMS.  TITLE TO AND OWNERSHIP OF THE

/ SOFTWARE SHALL AT ALL TIMES REMAIN IN DEC.

/

/ THE INFORMATION IN THIS DOCUMENT IS SUBJECT TO CHANGE

/ WITHOUT NOTICE AND SHOULD NOT BE CONSTRUED AS A COM-

/ MITMENT BY DIGITAL EQUIPMENT CORPORATION.

/

/ DEC ASSUMES NO RESPONSIBILITY FOR THE USE OR RELIABILITY

/ OF ITS SOFTWARE ON EQUIPMENT WHICH IS NOT SUPPLIED BY

/ DEC.

/

	.EJECT

/  

/ EDIT #12

/ EDIT #22	MAY-12-76 (SCR) MODIFY SAVE-REMOVE-INSTALL FIX

/ EDIT #23	MAY-13-76 (SCR) FURTHER CLEANUP
/ EDIT #24	MAY-14-76 (SCR) REMNOD=. IN WRONG PLACE
/ EDIT #25	MAY-17-76 (SCR) POINTER OFF BY INSSZ

/  

/  

/ LAST EDIT: OCT  15  1975      M. HEBENSTREIT

/				S. ROOT

/  

/

/WRITTEN TO HANDLE BLOCK MODE (400 WORDS/BLOCK) MASS STORAGE DEVICES

/SUCH AS THE RP15 THAT WILL NOT HANDLE WORD ADDRESSABILITY. HOWEVER,

/IT WILL STILL WORK ON A WORD ADDRESSABLE DEVICE (SUCH AS RF15)

/

/THE ALLOCATION SIZE FOR THE TASK WAS IN A SPECIAL AREA JUST BEFORE THE

/ACTUAL TASK. THIS AREA WAS 10(8) WORDS LONG DUE TO THE FACT THAT THE

/LOW 3 BITS STILL HAD TO CONTAIN THE UNIT NUMBER. THE ALLOCATION WAS

/EXTENDED FOR 10(8) WORDS, AND THE STL NODE DISK ADDRESS WAS SET UP

/AS 10(8) MORE THAN IT WOULD HAVE BEEN. DUE TO THE FACT THAT ALL DISK

/TRANSFERS IN BLOCK MODE MUST START ON A SECTOR(BLOCK) BOUNDARY, THIS

/HAS NOW BEEN EXTENDED TO 400(8) WORDS. PERHAPS SOME USEFUL FUNCTION

/CAN BE DEVISED TO KEEP SOME MORE INFORMATION IN THE NOW WASTED 377(8)

/WORDS.

/ EDIT #3 S. ROOT WORDS 2-4 NAME, NAME, BASE . FOR RECONFIGURATION

/(THE REMOVE TASK HAS BEEN MODIFIED TO LOOK IN THE RIGHT PLACE.)

/

/

/

/

X10=10

X11=11

X15=15

IDX=ISZ

R1=101

R2=102

REMBLK=311

P.N1=2

P.N2=3

P.BS=4

ECLA=641000

NADD=107	/NODE ADDITION

PENP=115	/PICK EMPTY NODE FROM POOL

SNAM=123	/SCAN DEQUE FOR NAME

STKL=242	/SYSTEM TASK LIST

PBDL=250	/PARTITION BLOCK DESCRIPTOR LIST

SCDL=254	/SYSTEM COMMON BLOCKS DESCRIPTION LIST

RELHWE=235	/CONTAINS A SKIP IF RELOCATE ON MACHINE

FPHDW=236	/CONTAINS A SKIP IF FP15 ON MACHINE

/

INSTAL=.	/BEGINNING OF INSTALL ROUTINE

I.BLOK=.	/(MJH-12) WARNING 1ST 400(8) LOCATIONS OVERLAYED ***

	DZM	I.DSKA	/DISK AREA NOT ASSIGNED YET

	DZM	I.DFPR	/NO DEFAULT PRIORITY YET

	LAC	(I.ALSZ	/(023)

	DAC	I.ACPB+3

	AND	(70000

	CMA!IAC

	DAC	XRADJ

        CAL     RDTDV  /READ THE TDV BUFFER

        LAC     I.EV

        SMA

        JMP     .+3

        LAC     (I.ME16

        JMP     I.ERRR

        JMS     FAC    /LOOK FOR THE FIRST SPACE

        JMS     I.TER    /CR OR ALT.?

        JMP     I.ER01   /YES -- ERROR

        SAD     (040     /NO -- SPACE?

        SKP              /YES

        JMP     .-5      /NO -- TRY AGAIN

/STANDARD INSTALL TASK - A LINE MUST BE DECODED

	LAW	-2	/SET UP THE COMMA COUNT

	DAC	I.BCNT	/FOR PARTITION NAME SCAN

	JMS	I.GTNM	/CREATE A SIXBIT NAME BLOCK FROM THE LINE

	I.TSKN		/PLACE IT HERE

	JMP	I.ER01	/GO HERE ON AN ERROR

	JMS	I.TER	/WAS THE DELIMITING CHARACTER A DELIMITER?

	JMP	I.INST	/YES, NO PRIORITY SPECIFIED

	JMS	NUMBER	/NO -- GET THE PRIO

	JMP	I.ER01	/RETURN HERE ON AN ERROR

	DAC	TERM	/RETURN HERE IF OK AND SAVE TERMINATOR

	LACQ		/GET THE PRIORITY

	SPA!SNA		/PRIO MUST BE POSITIVE AND NON-ZERO

	JMP	I.ER01	/IT'S NOT -- ERROR

	LACQ		/IS PRIO <= 512?

	TAD	(-1001

	SMA

	JMP	I.ER01	/NO -- ERROR

	LACQ		/YES -- OK

	DAC	I.DFPR	/SAVE THE PRIO

	LAC	TERM	/PICK UP THE BREAK CHAR

	JMS	I.TER	/IS IT A LINE TERMINATOR?

	JMP	I.INST	/YES -- GO INSTALL THE TASK

I.ER01	LAC	(I.ME01	/ERROR IN SYNTAX, SHOW IT

	JMP	I.ERRR	/

/

/ROUTINE TO CREATE A NAME. THE TERMINATING CHARACTER IS LEFT IN THE

/AC UPON EXIT. IT CAN ONLY BE A TERMINATOR, SPACE, OR A COMMA.

/

I.GTNM	XX		/ENTRY/ARG/ERROR EXIT/NORMAL EXIT

	LAW	-2	/ALLOWED TWO TRIES FOR TWO WORDS

	DAC	I.ACNT	/SET THE COUNT

	LAC*	I.GTNM	/PICK UP THE ADDRESS OF THE BLOCK

	DAC	I.WRK	/SAVE IT

	ISZ	I.GTNM	/UP TO NORMAL RETURN

I.GTLP	DZM*	I.WRK	/CLEAR THE CHARACTER WORD

	JMS	I.GTC6	/GET A SIXBIT CHARACTER

	ALSS	14	/PUT IT IN IT'S PROPER PLACE

	DAC*	I.WRK

	JMS	I.GTC6	/SECOND

	ALSS	6	/PUT IT WHERE IT BELONGS

	XOR*	I.WRK

	DAC*	I.WRK

	JMS	I.GTC6	/LAST CHAR

	XOR*	I.WRK

	DAC*	I.WRK	/SIXBIT IS BUILT UP

	ISZ	I.WRK	/UP TO NEXT WORD

	ISZ	I.ACNT	/IF ALLOWED TO GO FOR MORE

	JMP	I.GTLP	/YES, CONTINUE

	JMS	I.GTFC	/NO, DONE, GET NEXT CHARACTER

	ISZ	I.GTNM	/TERMINATOR, LEAVE WITH IT IN THE AC AND A SKIP RETURN

	JMP*	I.GTNM	/RETURN TO INDICATE DONE

I.GTFC	XX	/SUB TO FETCH A CHARACTER AND SKIP IF ","," ", OR TERM

	JMS	FAC  	/PICKUP CHAR

	SAD	(40)	/TERMINATOR CHAR?

	JMP*	I.GTFC	/YES

	SAD	(54)	/?

	JMP*	I.GTFC	/YES

	JMS	I.TER	/?

	JMP*	I.GTFC	/YES

	ISZ	I.GTFC	/NO, SKIP RETURN

	JMP*	I.GTFC

I.GTC6	XX	/SUB TO GET THE NEXT CHARACTER AND RETURN IT AS SIXBIT

	JMS	I.GTFC	/FETCH CHARACTER, SKIP IF NORMAL

	JMP	I.GTQQ	/NOT NORMAL CHAR, WHAT IS HAPPENING?

	LMQ		/SAVE THE CHARACTER

	AAC	-40	/IS IT IN THE SIXBIT SET?

	SPA		/SKIP IF POSSIBLY

	JMP	I.GTCE	/NO, ERROR

	AAC	-100	/STILL IN THERE?

	SMA!SZA		/SKIP IF SO

	JMP	I.GTCE	/NO, ERROR

	SAD	(-40)	/WAS IT THE CHARACTER "@"?

	JMP	I.GTCE	/YES, ERROR

	LACQ		/SEEMS TO BE OK

	AND	(77)	/TRIM IT DOWN

	JMP*	I.GTC6	/AND LEAVE

I.GTCE	LACQ		/ERROR

	JMP*	I.GTNM	/LEAVE WITH TERMINAL CHARACTER IN AC AT ERROR EXIT

I.GTQQ	LMQ		/SAVE TERMINAL CHARACTER

	LAC*	I.WRK	/IS THIS THE FIRST OF THE THREE?

	SNA		/SKIP IF NOT

	JMP	I.GTQR	/YES, SEE IF THIS IS THE FIRST OF ALL

I.GTOK	LACQ		/ALL IS WELL, RETURN THE TERMINATING CHARACTER IN

	ISZ	I.GTNM	/IN THE AC WITH A SKIP RETURN

	ISZ	I.WRK	/SET UP FOR POSSIBLE CLEARING OF SECOND WORD

	ISZ	I.ACNT	/SKIP IF NOW WORKING ON SECOND WORD

	DZM*	I.WRK	/CLEAR SECOND WORD IF IT HASN'T BEEN CLEARED

	JMP*	I.GTNM

I.GTQR	LAW	-2	/CHECK TO SEE

	SAD	I.ACNT	/IF THE COUNT IS AT -2

	SKP		/IT IS, CHECK THE CHARACTER

	JMP	I.GTOK	/IT IS NOT, LEAVE WITH TERMINATING CHARACTER IN AC

	LACQ		/IS THIS CHARACTER A SPACE?

	SAD	(40)	/SKIP IF NOT

	JMP	I.GTC6+1	/IT IS, IGNORE LEADING SPACES

	JMP*	I.GTNM	/IT IS NOT, ERROR EXIT WITH CHAR IN AC

/

I.TER	XX	/ROUTINE TO SKIP IF NOT CR OR ALTMODE

	SAD	(15)	/CR?

	JMP*	I.TER	/YES

	SAD	(175)	/ALTMODE?

	JMP*	I.TER	/YES

	ISZ	I.TER	/NEITHER,

	JMP*	I.TER	/SKIP RETURN

/

I.INST=.	/REAL WORK STARTS HERE

	DAC	TERM		/SAVE THE TERMINATOR

        DZM     I.PTNM   /CLEAR PARTITION NAME SPECIFICATION

/

/SCAN THE STL TO SEE IF THE TASK EXISTS ALREADY

/

	LAC	(STKL)

	DAC*	(R1)

	LAC	(I.TSKN)	/ADDRESS OF THE NAME

	DAC*	(R2)

	JMS*	(SNAM)	/GO LOOK (ALMOST ALL REGISTERS WIPED OUT)

	SKP		/NOT FOUND, ALL IS WELL

	JMP	I.ER02	/FOUND, ERROR

/

/CODE TO DO THE INSTALL WORK:

/

/NOTE: ALL DISK ADDRESS CARRIED AROUND DURING PROCESSING, AND PASSED ON

/TO THE RSX EXECUTE PROGRAM VIA THE LINK TABLE ARE OF THE FORM

/ BLOCK NUMBER * 400 + UNIT NUMBER. THE 'ADD' INSTRUCTION INSTEAD OF THE

/'TAD' INSTRUCTION IS USED TO CALCULATE DISK ADDRESSES, AS THIS WILL

/INCREMENT THE UNIT NUMBER IF AN OVERFLOW OCCURS.

/

/

	CAL	ATTACH	/ATTACH THE LUN-5 DEVICE

	CAL	I.WAIT	/WAIT FOR THE EV

	LAC	I.EV	/ALL OK?

	SMA		/SKIP IF NOT

	JMP	I.OVRY	/YES, CONTINUE

	SAD	(-6)	/NO ATTACH ALLOWED?

	SKP		/TRUE, SO CONTINUE

	JMP	I.ER13	/TREAT THIS AS A FILE NOT FOUND SITUATION

I.OVRY=.

/

	JMS	SEEK	/SEEK THE FILE

	LAC	(377777)	/FIND LINK #377777 FOR INFO

	DAC	I.LKNM	/

	DZM	I.ACNT	/COUNTING THE LINKS ON THE WAY

	JMS	I.FLNK	/GO DO IT

	LAC	INBUF+4	/BASE OF BLANK COMMON

	DAC	I.BCBS	/SAVED FOR PATCHING

/

	LAC	I.ACNT	/THE COUNT OF EXTERNAL LINKS+1 FOR THE ALLOCATION

	ALSS	10	/MULTIPLY BY 400

	TAD	INBUF+5	/NOW WE HAVE THE NUMBER OF BLOCKS *400

	AAC	377	/NEEDED TO HOLD THE IMAGE

	AND	(-400)	/ON THE DISK, WITH EACH OVERLAY

	DAC	I.ALSZ	/STARTING ON A BLOCK BOUNDARY

/

	LAC	INBUF+7	/SAVE THE BASE ADDRESS OF THE LINK TABLE

	DAC	I.LTBS

/

	LAC	INBUF+6	/AND THE SIZE OF THE RESIDENT IMAGE

	DAC	I.RISZ

/

	LAC	INBUF+11	/SAVE THE

	DAC	I.ENTR	/ENTRY POINT FOR THE TASK

	SMA		/IS FP15 REQUIRED?

	JMP	.+3	/NO

	XCT*	(FPHDW)	/SKIP IF FP IS THERE

	JMP	I.ER14	/NO, BUT IT IS NEEDED - ERROR

	DZM	I.XM		/(MJH-12) CLEAR XVM MODE BITS

	LAC	I.ENTR		/(MJH-12) IS THIS TASK EXEC MODE?

	RTL			/(MJH-12)

	SMA			/(MJH-12)

	JMP	I.OVXM		/(MJH-12) YES -- LEAVE XM BITS CLEARED

	LAC	INBUF+16	/(MJH-12) NO -- GET XM BITS

	DZM	INBUF+16	/(MJH-12) CLEAR GARBAGE OUT OF INBUF

	PAL			/(MJH-12) SAVE XM BITS TEMPORARILY

	AND	(1		/(MJH-12) IS TASK IN XVM MODE?

	SNA			/(MJH-12) 

	JMP	.+3		/(MJH-12) NO -- DON'T SET XVM MODE BITS IN STL NODE

	LAC	(000140		/(MJH-12) YES -- PREPARE TO SET XVM MODE BITS

	DAC	I.XM		/(MJH-12)

	PLA			/(MJH-12) RESTORE AC WITH FORMER CONTENTS OF INBUF+16

	AND	(2		/(MJH-12) WILL TASK RUN IN IOT MODE?

	SNA			/(MJH-12)

	JMP	I.OVXM		/(MJH-12) NO -- DON'T SET THE IOT BIT

	LAC	I.XM		/(MJH-12) YES -- PREPARE TO SET IOT BIT

	XOR	(20		/(MJH-12)

	DAC	I.XM		/(MJH-12)

I.OVXM=.			/(MJH-12)

/

	LAC	I.PTNM	/WAS THE PARTITION NAME SPECIFIED IN THE COMMAND?

	SZA		/SKIP IF NOT

	JMP	.+5	/OVER THIS IF SO

	LAC	INBUF+12	/MOVE THE PARTITION NAME IN

	DAC	I.PTNM

	LAC	INBUF+13

	DAC	I.PTNM+1

/

	LAC	INBUF+14	/SAVE THE BASE

	DAC	I.CORB	/ADDRESS OF THE PARTITION ACCORDING TO TKB

	DAC	I.LCOR	/SAVE THIS FOR LINK TABLE EXPANSION (&LINK #0)

/

	LAC	INBUF+15	/GET THE MAXIMUM TASK REGISTER

	AAC	377	/FORCE IT TO 400 WORD INCREMENTS

	AND	(-400)

	DAC	I.MXTR	/SAVE IT

	LAC	INBUF+15	/IF TASK SIZE IS 401,1001,ETC.,

	AND	(-400		/ADD 400 TO MAX TASK REG

	SAD	INBUF+15

	SKP

	JMP	.+4

	LAC	I.MXTR

	TAD	(400

	DAC	I.MXTR

	LAC	I.ENTR	/NOW WE SEE IF THAT WAS A MISTAKE AND THIS IS

	RTL		/REALLY AN EXEC MODE TASK

	SPA		/SKIP ON MISTAKE

	JMP	I.OVRX	/NO, WE DID GOOD, WELL DIDN'T WE????

	LAC	INBUF+14	/PICK UP THE PARTITION BASE ADDRESS

	TCA		/NEGATE

	TAD	INBUF+15	/NOW WE HAVE THE SIZE -1 OF THE TASK

	IAC		/SO FIX IT UP

	DAC	I.MXTR	/AND REPLACE OUR ERROR

/

I.OVRX	LAC	(PBDL)	/NOW WE SCAN THE PARTITION BLOCK DESCRIPTOR LIST

	DAC*	(R1)	/FOR THIS PARTITION

	LAC	(I.PTNM)	/NAME

	DAC*	(R2)	/

	JMS*	(SNAM)	/GO DO IT

	JMP	I.ER03	/NOT FOUND, WE HAVE TROUBLE HERE

	DAC	I.PBAD	/FOUND, SAVE THE ADDRESS FOR LATER

	AAC	4	/AND UP TO THE ADDRESS OF

	DAC	I.WRK	/THE PARTITION BASE ADDRESS

/

	LAC	I.ENTR	/PICK UP THE TASK ENTRY POINT AGAIN

	RTL		/AC0 IS THE PROTECTION INDICATOR

	SPA		/SKIP IF NOT PROTECTED

	JMP	I.RELT	/RELOCATED TASK, CHECK IT OUT

	LAC*	I.WRK	/NOT RELOCATED - WAS THE PARTITION BASE SPECIFIED

	SAD	INBUF+14	/CORRECTLY TO TKB?

	JMP	I.PARC	/YES , GO CHECK THE PARTITION

	JMP	I.ER03	/NO, ERROR

I.RELM	LAC	I.DFPR	/PRIORITY REQUESTED?

	SZA		/SKIP IF NOT

	JMP	I.CBCK	/IF SO, USE IT - NOW CHECK COMMON BLOCKS

	LAC	INBUF+10	/WAS A PRIORITY SPECIFIED TO TKB?

	SNA		/SKIP IF SO

	JMP	I.ER12	/NO, NO PRIORITY AT ALL - ERROR

	DAC	I.DFPR	/YES, SAVE THIS

I.CBCK	LAC	(INBUF+15)	/SET UP TO SCAN THE COMMON BLOCKS

	DAC*	(X15)	/ADDRESS OF LIST

	LAC*	X15	/PICK IT UP

	SNA		/ANYTHING THERE?

	JMP	I.ALLD	/NO, ALLOCATE THE DISK SPACE

	LAC*	(X15)	/YES, SET UP TO SCAN

	DAC*	(R2)	/THE SYSTEM COMMON BLOCK LIST

	LAC	(SCDL)	/FOR THIS COMMON BLOCK

	DAC*	(R1)	/NAME

	JMS*	(SNAM)	/GO DO IT - FOUND?

	JMP	I.ER09	/NO, ERROR

	AAC	4	/YES, SET UP TO COMPARE

	DAC*	(X10)	/THE BASE AND SIZE

	LAC*	X15	/SCAN OVER THE NAME SECOND HALF

	LAC*	X15	/ARE THE BASES THE SAME?

	SAD*	X10	/SKIP IF SO

	SKP

	JMP	I.ER09	/NO, ERROR

	LAC*	X15	/ONCE MORE

	SAD*	X10	/FOR THE SIZES

	JMP	I.CBCK+2	/ALL OK, KEEP LOOKING

	JMP	I.ER09	/NO, ERROR

/

I.RELT	XCT*	(RELHWE)	/DO WE HAVE RELOCATION HARDWARE?

	JMP	I.ER14	/NO, SHOW THE ERROR

I.PARC	ISZ	I.WRK	/YES, CHECK THE SIZE OF THE PARTITION

	LAC*	I.WRK	/TO SEE IF THIS WILL FIT

	TCA		/NEGATE

	TAD	I.MXTR	/AND ADD THE HIGHEST TASK REGISTER IN

	SMA!SZA		/WILL IT FIT? SKIP IF SO

	JMP	I.ER03	/NO, TASK IS TOO LARGE - ERROR

	JMP	I.RELM	/YES IT WILL FIT, CARRY ON WITH OTHER THINGS

/

I.ALLD	CAL	I.ACPB	/ALLOCATE THE DISK SPACE NEEDED

	CAL	I.WAIT	/WAIT UNTIL COMPLETION

	LAC	I.EV	/PICK UP THE EV

	SPA		/ALLOCATION OK? - SKIP IF SO

	JMP	I.ER06	/NO - ERROR

	ISZ	I.DSKA	/YES, SHOW THAT WE HAVE ALLOCATED DISK SPACE

	LAC	I.ALSZ+1	/MOVE THE ADDRESS INTO THE

	DAC	I.PCPB	/PUT CPB

	LAC	I.ALSZ+2

	DAC	I.PCPB+1

	LAC	(I.BLOK-1)	/CLEAR THE DISK I/O BLOCK

	DAC*	(X10)	/TO ZEROS

	LAW	-400

	DAC	I.WRK

	DZM*	X10

	ISZ	I.WRK

	JMP	.-2

	LAC	I.ALSZ	/NOW CLEAR ALL OF THE ALLOCATED DISK AREA TO

	DAC	I.WRK	/ZEROS

	CAL	I.PUTC	/PUT THE ZEROS OUT

	JMS	I.WFEV	/WAIT UNTIL DONE

	LAC	I.PCPB+1	/UP THE ADDRESS

	CLL

	TAD	(400	/TO THE NEXT BLOCK

	DAC	I.PCPB+1

	SZL		/IF OVERFLOW

	ISZ	I.PCPB	/UP THE HIGH-ORDER WORD ALSO

	LAW	-400	/COUNT DOWN

	TAD	I.WRK	/TO ZERO

	SMA!SZA		/DONE?

	JMP	.-14	/NO, KEEP ON

/

/THE DISK SPACE HAS BEEN ALOCATED, AND ALL OF IT IS ZEROED. NOW TO

/BRING THE CODE IN.

/

	LAC	I.ALSZ	/PICK UP THE SIZE OF THE ALLOCATION

	DAC	I.BLOK	/SET THIS IN AS WORD ZERO OF THE BLOCK

/

/  EDIT #3 CHANGE

/

	LAC	I.PTNM	/NAME

	DAC	I.BLOK+1

	LAC	I.PTNM+1

	DAC	I.BLOK+2

	LAC	I.CORB	/BASE

	DAC	I.BLOK+3

/

/  END EDIT #3 CHANGE

/

	LAC	I.ALSZ+2	/SET UP THE DISK GET/PUT CONTROL TABLE

	DAC	I.PCPB+1	/SO THE FIRST WRITE WILL SEND OUT

	LAC	I.ALSZ+1	/THE BLOCK WITH THE ALLOCATION SIZE IN IT

	DAC	I.PCPB

	XOR	I.ALSZ+2	/SET THIS BLOCK (IN CORE) AS BEING THE

	DAC	I.THIS	/FIRST ONE

	ADD	(400)	/NOW UP TO THE BLOCKS TO BE USED

	DAC	I.DSKB	/SAVE AS BASE OF LINK ZERO

	DAC	I.LBSE	/SET THIS ALSO AS THE BASE FOR THE FIRST LINK

	LAW	-1	/SHOW THAT CURRENT BLOCK HAS BEEN MODIFIED

	DAC	I.WRIT	/SO IT WILL BE WRITTEN OUT

/

/EXPAND THE LINK TABLE IF IT EXISTS

/

	JMS	I.EXPL	/DO IT

	CAL	CLOSE	/CLOSE THE FILE

	JMS	SEEK	/RE-SEEK THE FILE

	DZM	I.LKNM	/FIND LINK #0

	JMS	I.FLNK	/

I.LOOP	JMS	I.EXPL	/EXPAND THIS LINK

	LAC	I.MXDK	/PICK UP THE MAXIMUM DISK BLOCK USED

	SZA

	JMP	.+3

	LAC	I.THIS

	DAC	I.MXDK

	ADD	(400)	/UP TO THE NEXT ONE

	DAC	I.WRK	/SAVE THIS AS THE BASE FOR THE NEXT LINK

	LAC	INBUF+3	/LAST LINK?

	SAD	(377777)	/SKIP IF NOT

	JMP	I.DEXP	/YES, DONE EXPANDING THE TSK FILE

	JMS	I.LKTB	/NO, SET UP THE LINK TABLE FOR THE NEXT LINK

	JMP	I.LOOP	/ AND GO FOR MORE

/

/SUBROUTINE TO READ THROUGH UNTIL A CERTAIN LINK IS FOUND

/

I.FLNK	XX		/LINK NUMBER IS IN I.LKNM

	JMS	READ	/READ A RECORD

	LAC	INBUF+2	/IS THIS A TYPE ONE RECORD?

	AND	(IOT)

	SAD	(JMS)	/SKIP IF NOT

	JMP	I.OVRP	/IT IS, IS IT THE ONE WE WANT?

	SNA		/IT ISN'T - ERROR VIA TYPE 0 RECORD?

	JMP	I.ER10	/YES, LEAVE

	JMP	I.FLNK+1	/CYCLE ON FOR MORE

I.OVRP	LAC	INBUF+3	/TYPE ONE RECORD FOUND, IS IT THE ONE WE WANT?

	SAD	I.LKNM	/SKIP IF NOT

	JMP*	I.FLNK	/IT IS, LEAVE

	ISZ	I.ACNT	/IT IS NOT, COUNT THE LINKS FOUND

	NOP		/ANYWAY

	JMP	I.FLNK+1	/AND GO FOR MORE

/

/

/SUBROUTINE TO EXPAND A LINK. THE TYPE ONE RECORD HAS BEEN READ. UPON

/EXIT, A TYPE ONE RECORD WILL BE IN 'INBUF'.

/

I.EXPL	XX

	DZM	I.MXDK	/CLEAR OUT THE HIGHEST DISK ADDRESS USED

/

/I.LBSE SHOULD CONTAIN THE BASE DISK ADDRESS FOR THIS LINK

/I.LCOR SHOULD CONTAIN THE BASE CORE ADDRESS THAT CORESPONDS TO I.LBSE

/

I.EXLP	LAC	(INBUF+2)

	DAC	I.PNTR	/SET UP FOR 'GETW' ROUTINE

	JMS	READ	/READ A RECORD

	LAC	INBUF+2	/IS IT A TYPE TWO RECORD?

	AND	(IOT)

	SAD	(LAC)	/SKIP IF NOT

	JMP	I.TYP2	/IT IS, PROCESS IT

	SAD	(ADD)	/TYPE THREE?

	JMP	I.TYP3	/YES, PROCESS IT

	SAD	(JMS)	/TYPE ONE?

	JMP*	I.EXPL	/YES, LEAVE

	LAC	INBUF+2	/IS THIS THE EOF ON LINK EXPANSION?

	SZA		/MAYBE

	JMP	I.ER10	/NO, READ ERROR

	LAC	I.LKNM	/CHECK TO SEE IF THIS IS LINK 377777

	SAD	(377777)	/SKIP IF NOT

	JMP*	I.EXPL	/IT IS, LEAVE

	JMP	I.ER10	/IT ISN'T - READ ERROR

I.TYP2	JMS	I.GETW	/PICK UP THE COUNT

	SAD	(-1)	/SKIP IF NOT THE END OF THE RECORD

	JMP	I.EXLP	/IT IS, GO FOR MORE RECORDS

	AND	(077777)	/SINGLE IT OUT

	TCA		/NEGATE IT

	DAC	I.ACNT	/SAVE IT

	JMS	I.GETW

	JMS	I.GETA	/PICK UP AN ADDRESS AND READ THAT BLOCK INTO CORE

I.T2LP	JMS	I.GETW	/PICK UP A WORD

	JMS	I.PUTW	/SET IT DOWN

	ISZ	I.ACNT	/SKIP WHEN DONE

	JMP	I.T2LP	/UNTIL THEN

	JMP	I.TYP2	/GO UNTIL DONE

/

/SUBROUTINE TO PICK UP ONE WORD FROM THE BUFFER

/

I.GETW	XX

	LAC*	I.PNTR	/PICK IT UP

	ISZ	I.PNTR	/INCREMENT IT

	JMP*	I.GETW	/AND LEAVE

/

/SUBROUTINE TO PUT ONE WORD INTO THE DISK BLOCK

/(A CALL TO I.GETA SHOULD BE DONE FIRST TO SET UP THE PARAMETERS)

/

I.PUTW	XX

	DAC*	I.DPNT	/SET IT IN

	LAW	-1	/SHOW THAT THE BLOCK

	DAC	I.WRIT	/HAS BEEN MODIFIED

	ISZ	I.DPNT	/INCREMENT THE POINTER

	ISZ	I.BCNT	/SEE IF THE END OF THE BLOCK HAS BEEN REACHED

	JMP*	I.PUTW	/IT HASN'T, LEAVE

	LAC	I.THIS	/GO TO THE NEXT BLOCK

	ADD	(400)	/FOR THE CONTINUATION OF THIS ESCAPADE

	JMS	I.XDSK	/PICK UP THE BLOCK 

	LAC	(I.BLOK)	/AND RESET THE

	DAC	I.DPNT	/POINTERS

	LAW	-400	/TO THE DISK

	DAC	I.BCNT	/BLOCK

	JMP*	I.PUTW	/LEAVE

/

/SUBROUTINE TO SEE THAT THE DISK BLOCK THAT WILL CONTAIN A CERTAIN ADDRESS

/IS IN CORE, AND TO SET UP POINTERS FOR I.PUTW

/CALL WITH THE DESIRED CORE ADDRESS IN THE AC - IT WON'T BE THERE ON RETURN

/

I.GETA	XX

	AND	(77777)

	TCA	/NEGATE

	TAD	I.LCOR	/ADD IN THE BASE

	TCA		/POP BACK TO POSITIVE

	DAC	I.DPNT	/SAVE

	AND	(-400)	/FIND OUT WHICH RELATIVE BLOCK

	ADD	I.LBSE	/FIND OUT WHICH ACTUAL BLOCK

	JMS	I.XDSK	/BRING THAT ONE INTO CORE

	LAC	(377)	/NOW WE PICK UP

	AND	I.DPNT	/THE OFFSET INTO THE DISK BLOCK

	AAC	-400	/CREAT THE NUMBER OF WORDS LEFT IN THE BLOCK

	DAC	I.BCNT	/SAVE THIS AS A COUNTER FOR I.PUTW

	TAD	(I.BLOK+400)	/UP TO THE CORE ADDRESS IN REAL CORE

	DAC	I.DPNT	/WHERE THE WORD IS

	JMP*	I.GETA	/LEAVE

/

/SUBROUTINE TO MAKE CERTAIN THAT THE CORRECT BLOCK IS IN CORE. THE

/ONE CURRENTLY IN CORE IS WRITTEN OUT, IF IT HAS BEEN MODIFIED (I.WRIT=-1)

/

I.XDSK	XX		/ENTRY

	DAC	I.BCNT	/SAVE THIS

	XOR	I.THIS	/IS THE BLOCK THE ONE THAT IS IN CORE?

	SNA		/SKIP IF NOT

	JMP*	I.XDSK	/IT IS, LEAVE

	XOR	I.THIS	/RESORE THE ORIGINAL AC CONTENTS

	LMQ		/FIND OUT IF THE BLOCK JUST ABOUT TO BE READ IN

	LLS	12	/IS HIGHER NUMBERED THAN THE ONE SHOWN IN I.MXDK

	DAC	I.GETW	/SAVE THIS

	LAC	I.MXDK	/PICK UP THE CURRENT MAXIMUM

	LMQ

	LLS	12	/CREATE A PROPER COMPARISON NUMBER

	TCA		/NEGATE

	TAD	I.GETW	/ADD IN THE ONE WE ARE ABOUT TO GET

	RAL		/SAVE THE SIGN

	LAC	I.BCNT	/PICK UP THE ONE WE WANT

	SNL		/SKIP IF IT IS LOWER

	DAC	I.MXDK	/IF HIGHER OR EQUAL, RESET I.MXDK

	ISZ	I.WRIT	/HAS THE CURRENT RECORD BEEN MODIFIED?

	JMP	.+3	/NO, SO JUST READ THE NEW ONE IN

	CAL	I.PUTC	/PUT OUT THE CURRENT BLOCK

	JMS	I.WFEV	/WAIT UNTIL DONE

	DZM	I.WRIT	/CLEAR THE 'THE BLOCK HAS BEEN MODIFIED' FLAG

	LAW	777400	/PICK UP THE

	AND	I.BCNT	/BLOCK NUMBER

	DAC	I.PCPB+1	/AND SET IT IN THE DISK CONTROL TABLE

	XOR	I.BCNT	/PICK UP THE UNIT NUMBER

	DAC	I.PCPB	/AND SET IT IN ALSO

	XOR	I.PCPB+1	/NOW SET THE CURRENT BLOCK POINTER

	DAC	I.THIS	/TO POINT TO WHERE WE ARE NOW

	CAL	I.GETC	/GET THE NEW BLOCK

	JMS	I.WFEV	/WAIT

	JMP*	I.XDSK	/AND LEAVE

/

/

I.TYP3	XOR	INBUF+2	/PICK UP THE TOTAL NUMBER OF PATCHES

	SPA!SNA		/SKIP IF THERE ARE ANY

	JMP	I.EXLP	/NO, LOOK FOR SOMETHING ELSE TO DO

	DAC	I.TOTP	/SAVE THIS

I.T3LP	ISZ	I.PNTR	/FIND OUT HOW MANY

	JMS	I.GETW	/PATCHES ON THIS RECORD

	SPA!SNA!TCA	/SKIP IF THERE ARE ANY

	JMP	I.EXLP	/NO, CARRY ON WITH THE NEXT RECORD

	DAC	I.CCNT	/YES, SAVE THE COUNT

	TAD	I.TOTP	/AND SUBTRACT THIS FROM THE TOTAL

	DAC	I.TOTP

I.T3LQ	LAC*	I.PNTR	/PICK UP THE ADDRESS

	AND	(077777)	/WHERE THE PATCH GOES

	JMS	I.GETA	/MAKE SURE THAT IT IS IN CORE

	JMS	I.GETW	/FIND OUT WHAT THE FUNCTION IS

	AND	(IOT)

	SAD	(JMS)	/IS IT ADDRESS FIELD MODIFICATION?

	JMP	I.T3AD	/YES, DO IT

	SAD	(LAC)	/IS IT BLANK COMMON OFFSET?

	JMP	I.T3CO	/YES

	SZA		/IS IT SIMPLE REPLACEMENT?

	JMP	I.ER10	/NO, MUST BE A READ ERROR

	JMS	I.GETW	/PICK UP THE WORD

I.T3BK	DAC*	I.DPNT	/SET IT IN THE DISK BLOCK

	LAW	-1	/SET THE 'MODIFIED BLOCK' FLAG

	DAC	I.WRIT	/TO SHOW THAT WE CHANGED THE BLOCK

	ISZ	I.CCNT	/COUNT THE PATCHES

	JMP	I.T3LQ	/NOT YET DONE, GO FOR MORE

	LAC	I.TOTP	/ARE WE COMPLETELY DONE?

	SPA!SNA		/SKIP IF NOT

	JMP	I.EXLP	/YES, READ A TYPE ONE RECORD

	JMS	READ	/NO, RESET FOR THE NEXT PATCH RECORD

	LAC	(INBUF+2)

	DAC	I.PNTR	/SET UP FOR 'GETW'

	LAC	INBUF+2	/MAKE CERTAIN THAT THIS IS

	AND	(IOT)	/A TYPE THREE RECORD

	SAD	(ADD)	/SKIP IF NOT

	JMP	I.T3LP	/IT IS, FINISH UP

	JMP	I.EXLP+3	/IT ISN'T, WHAT HAPPENED???

I.T3AD	LAC	I.ENTR	/PICK UP THE TASK ENTRY POINT

	RAL		/BANK/PAGE BIT TO AC0

	SMA!CLA

	LAC	(010000)	/PAGE MODE, MUST KEEP THE INDEX BIT

	XOR	(760000)	/CREATE A MASK

	PAL		/SAVE THIS

	AND*	I.DPNT	/PICK UP THE INSTRUCTION FIELD ONLY

	LMQ		/SAVE THIS

	PLA		/BRING THE MASK BACK

	CMA		/FLIP IT OVER

	AND*	I.PNTR	/BRING IN THE NEW ADDRESS FIELD

	OMQ		/AND BRING THE INSTRUCTION OUT

	ISZ	I.PNTR	/UP THE POINTER

	JMP	I.T3BK	/AND PUT THIS AWAY

I.T3CO	JMS	I.GETW	/PICK UP THE WORD

	TAD	I.BCBS	/ADD IN THE BASE OF BLANK COMMON

	JMP	I.T3BK	/AND PUT THE WORD AWAY

/

/

/SUBROUTINE TO SET UP THE LINK TABLE FOR THE LINK ABOUT TO BE PROCESSED

/

I.LKTB	XX

	LAC	I.CORB	/SET UP TO ACCESS ON LINK 0 LEVEL

	DAC	I.LCOR	/AS THIS IS LINK TABLE MODIFICATION

	LAC	I.DSKB

	DAC	I.LBSE

	LAC	I.LTBS	/PICK UP THE BASE ADDRESS OF THE LINK TABLE

	IAC		/PLUS ONE

I.LKLP	DAC	I.PNTR	/SAVE THIS

	JMS	I.GETA	/BRING THIS INTO CORE

	LAC*	I.DPNT	/IS THIS THE END OF THE LINK TABLE?

	SAD	I.LTBS	/SKIP IF NOT

	JMP	I.LKUP	/IT IS, SET UP FOR THE NEXT LINK

	LAC	I.PNTR	/PICK UP THE

	AAC	7	/LINK NUMBER WORD

	JMS	I.GETA	/

	LAC*	I.DPNT	/IS THIS THE LINK WE ARE WORKING ON NOW?

	SAD	INBUF+3	/SKIP IF NOT

	JMP	I.LKBS	/IT IS, SET UP THE DISK ADDRESS ON THIS ONE

I.LKMR	LAC	I.PNTR	/IT ISN'T, UP TO THE NEXT ONE

	AAC	13	/IN THE TABLE

	JMP	I.LKLP

/

/NOTE: EARLIER VERSIONS USED THE MINIMUM ADDRESS WORD TO FLAG THE LINKS

/THAT HAD BEEN UPDATED. HOWEVER, WITH THE LOW END OF THE DISK ALLOCATED

/TO THE SYSTEM IMAGE, IT IS VERY UNLIKELY THAT THE LINK NUMBERS WILL

/REACH THE SAME MAGNITUDE AS THE DISK ADDRESS THAT REPLACES IT.

/THEREFORE, THE SAD SHOULD BE ENOUGH.

/

I.LKBS	LAC	I.WRK	/SET THE BASE ADDRESS OF THIS LINK

	JMS	I.PUTW	/IN THE LINK TABLE

	LAC*	I.DPNT	/AND SET THE MINIMUM ADDRESS OF THE LINK

	DAC	I.TMP	/IN A SAFE PLACE FOR SETTIN I.LCOR WHEN DONE

	JMP	I.LKMR	/NOW LOOK AT THE NEXT LINK

/

I.LKUP	LAC	I.TMP	/SET THE CORE BASE ADDRESS FOR THIS LINK

	DAC	I.LCOR	/IN FOR DISK ADDRESS ADJUSTING

	LAC	I.WRK	/SET THE DISK BASE ADDRESS CORRESPONDING TO

	DAC	I.LBSE	/I.LCOR IN ALSO

	JMP*	I.LKTB	/AND LEAVE

/

/

/THE WHOLE THING IS DONE, NOW TO MAKE THE STL ENTRY FOR THIS TASK

/AND LEAVE THIS BLOODY MESS.

/

I.DEXP=.

	CAL	CLOSE	/CLOSE THE FILE

	CAL	DETACH	/AND DETACH THE DEVICE

	CAL	I.WAIT

	ISZ	I.WRIT	/DOES THE DISK BLOCK NEED RE-WRITING?

	JMP	I.DOVR	/NO, GO CLEAN UP

	CAL	I.PUTC	/YES, WRITE IT OUT

	JMS	I.WFEV	/AND WAIT FOR IT

I.DOVR=.

	.TITLE	SAVE-REMOVE-INSTALL BLOCK CHAIN UPDATE

/

/ (THE CODE FOUND BETWEEN THE "*****" WAS ENTERED BY MJH 4/6/76 EDIT #13

/  AND SCR EDIT #23)

/ *********************

/

/

/ THE FOLLOWING CODE IS USED TO UPDATE THE INSTALL/REMOVE

/ CHAIN OF BLOCKS IN ORDER TO FIX THE SAVE-REMOVE-INSTALL

/ GLITCH. THE IDEA IS THAT EACH TIME THE STL IN CORE IS CHANGED,

/ THIS CHAIN OF DISK BLOCKS MUST ALSO CHANGE. WHENEVER A TASK IS

/ REMOVED, THE TASKS NAME IS ENTERED INTO THE CHAIN. WHENEVER A

/ TASK IS INSTALLED,  A COPY OF ITS STL NODE (LESS POINTERS) IS

/ ENTERED INTO THE CHAIN ALONG WITH THE TASKS PBDL DATA.

/ WHEN THE SYSTEM IS BOOTSTAPPED THE COPY OF SAVE WHICH IS

/ IN CORE READS THE CHAIN OF BLOCKS AND RECONSTRUCTS THE

/ STL FROM THE DATA FOUND IN THE BLOCKS.

/ WHENEVER A SAVE IS DONE (STL IN CORE MATCHES STL ON DISK)

/ THIS CHAIN OF BLOCKS IS PURGED.

/

/ THE STRUCTURE OF EACH BLOCK IS:

/

/	WORDS 0-375 USED FOR DATA ENTRIES

/	WORD 376 IS A POINTER TO 1ST FREE WORD IN BLOCK

/	WORD 377 IS A POINTER TO NEXT BLOCK OR -1

/

/ THE STRUCTURE OF A REMOVE ENTRY IS:

/

/	NTRY+0 -1 (FLAG SAYING THIS ENTRY IS A REMOVE)

/	NTRY+1 TASK NAME IN SIXBT 1ST HALF

/	NTRY+2 TASK NAME IN SIXBT 2ND HALF

/

/ THE STRUCTURE OF AN INSTALL ENTRY IS:

/

/	NTRY+0 +1 (FLAG SAYING THIS ENTRY IS AN INSTALL)

/	NTRY+1 TASK NAME IN SIXBT 1ST HALF

/	NTRY+2 TASK NAME IN SIXBT 2ND HALF

/	NTRY+3 STL NODE WORD 4

/	NTRY+4 STL NODE WORD 5

/	NTRY+5 STL NODE WORD 6

/	NTRY+6 STL NODE WORD 7

/	NTRY+7 STL NODE WORD 10

/	NTRY+10 STL NODE WORD 11

/	NTRY+11 PARTITION NAME IN SIXBT 1ST HALF

/	NTRY+12 PARTITION NAME IN SIXBT 2ND HALF

/	NTRY+13 PARTITION BASE ADDRESS

/

/ NOTE THAT IT IS EXTREMELY IMPORTANT TO FILL UP DATA

/ ENTRIES IN THE REMOVE CHAIN IN THE ORDER THAT EACH

/ STL MODIFICATION WAS MADE.

/

/ NOTE ALSO THAT ALL TASKS WHICH ACCESS THIS CHAIN OF 

/ BLOCKS MUST RESIDE IN THE SAME PARTITION.

/ THOSE TASKS ARE: SAVE,TDV REM, MCR REM, TDV INS, MCR INS,

/ FININS, AND AUTORM.

/

	.EJECT

/

/ START TO PROCESS THE REMOVE CHAIN OF BLOCKS

/

INSSZ=14				/SIZE OF AN INSTALL ENTRY

REMSZ=2					/SIZE OF A REMOVE ENTRY

BEGIN	DZM	REMFLG		/NOT AT END, ZERO FLAG

	LAC*	(REMBLK		/GET THE 1ST BLOCK IN THE CHAIN

	SKP			/JOIN UP TO PLACE BLOCK

/

/ READ IN A BLOCK IN THE CHAIN

/

REM0	LAC	I.BLOK+377	/GET NEXT BLOCK

	DAC	CURBLK		/SAVE CURRENT BLOCK NUMBER

	JMS	CONVRT		/CONVERT TO PLATTER AND ADDR

	CAL	I.GETC		/READ IN DISK BLOCK

	CAL	I.WAIT

	LAC	I.EV		/ANY ERRORS ON READ?

	SPA

	JMP	I.ER11		/YES --

				/NO --

/

REM1	LAC	REMFLG		/NOP UNLESS LAST BLOCK, 

	SMA			/LAST, FORCE -1

	LAC	I.BLOK+376	/DATA, LAST BLOCK MISSES THIS

	SMA			/SKIP IF LAST BLOCK

	JMP	REM0		/NO, FETCH ANOTHER

	AAC	377-INSSZ	/CAN INSTALL ENTRY FIT

	SPA			/SKIP IF YES

	JMP	GETSOM		/NO, ANOTHER BLOCK NEEDED

	AAC	-377		/UPDATE POINTER

	DAC	I.BLOK+376

	CMA			/SET UP X10 TO PLACE DATA
	TAD	(I.BLOK-1-INSSZ	/(025)SETUP X10 TO POINT AT NTRY-1

	DAC*	(X10		/SAVE BLOCK ENTRY POINTER

	CLA!IAC			/SET UP FLAG WORD ENTRY

	DAC*	X10		/IF FLAG IS +1 THIS IS AN INSTALL NTRY

	LAC	(I.TSKN-1	/PREPARE TO ENTER STL DATA

	DAC*	(X11		/USER X11 AS A POINTER TO STL DATA

	LAW	-10		/TRANSFER WORDS 2-11 OF STL NODE

	DAC	I.TMP		/INTO BLOCK NTRY

	LAC*	X11

	DAC*	X10

	ISZ	I.TMP

	JMP	.-3

	LAC	I.PBAD		/PREPARE TO ENTER PBDL DATA

	JMS	SETXR

	LAC	P.N1,X		/GET PART NAME

	DAC*	X10

	LAC	P.N2,X

	DAC*	X10

	LAC	P.BS,X		/GET BASE

	DAC*	X10

/

/ UPDATE THE BLOCK DATA ITEM POINTER, WRITE OUT BLOCK, AND QUIT

/

	JMS	PUTBLK		/WRITE OUT THE DISK BLOCK

	JMP	REMNOD		/ALL DONE WITH THIS PHASE

/

/ PREPARE TO GET NEXT BLOCK IN CHAIN OR ALLOCATE A NEW BLOCK

/

GETSOM	LAC	I.BLOK+376	/NO LONGER EOF, MAKE IT +

	CMA

	DAC	I.BLOK+376	/

	LAW	-1		/SET REMFLG TO SHOW END

	DAC	REMFLG

	SAD	I.BLOK+377	/ANOTHER BLOCK ALREADY IN CHAIN

	JMP	ALLBLK		/(027) GO TO ALLOCATE A NEW BLOCK

	JMS	PUTBLK		/(027) OLD BLOCK OUT WITH + POINTER

	JMP	REM0		/NO -- PREPARE TO READ IN ANOTHER

				/YES --

/

/ ALLOCATE A NEW BLOCK FOR THE REM CHAIN

/

ALLBLK	LAC	(ALLCTA		/ENTER SAV-REM-INS ALLOCATE CTA 

	DAC	I.ACPB+3	/INTO ALLOCATE CPB

	CAL	I.ACPB		/ALLOCATE A BLOCK

	CAL	I.WAIT

	LAC	I.EV		/ANY ERRORS?

	SPA

	JMP	I.ER06		/YES

	LAC	ALLCTA+2	/NO -- GET THE BLK NUMBER

	LMQ			/CONVERT PLATTER AND ADDR

	LAC	ALLCTA+1	/TO A DISK BLOCK NUMBER

	AND	(7777

	LRSS	10

	LACQ

	DAC	NEWBLK		/SAVE THE BLK NUMBER

/

/  CAN WE WRITE ON THE NEW BLOCK, TRY IT. IF FAILS,

/ THE PREVIOUS BLOCK DOESN'T POINT AT IT.

/

	JMS	CONVRT		/CHANGE TO PLATTER AND ADDR

	JMS	PUTBLK		/WRITE OUT THE NEW BLOCK

/

/ OK, SO WRITE OUT THE CURRENT DISK BLOCK

/

	LAC	CURBLK		/GET CURRENT BLOCK NUMBER

	JMS	CONVRT		/PREPARE TO WRITE IT OUT

	LAC	NEWBLK		/SET UP BLK FORWARD PTR

	DAC	I.BLOK+377

	JMS	PUTBLK		/WRITE OUT THE OLD BLOCK

/

/ INIT THE NEW DATA BLOCK BUFFER

/

	LAC	NEWBLK		/SET NEWLY ALLO'D BLK TO CURRENT BLK

	DAC	CURBLK

	JMS	CONVRT		/PREP TO WRITE OUT THIS BLOCK

	LAW	-1		/NO BLOCK POINTER ON NEW BLOCK

	DAC	I.BLOK+377

	JMP	REM1		/GO PROCESS ZEROD BLK

/

REMFLG	0			/0 UNTIL LAST FOUND, THEN -1

NEWBLK	0

CURBLK	0

XRADJ	0

/

/ SUBROUTINE SETXR -- SETUP XRADJUSTMENT

/

SETXR	0					/(MJH-12)

	TAD	XRADJ				/(MJH-12)

	PAX					/(MJH-12)

	JMP*	SETXR				/(MJH-12)

/

/ SUBROUTINE CONVRT -- CHANGE BLK NUMBER IN AC TO PLAT AND ADDR

/

CONVRT	0					/(MJH-12)

	LMQ					/(MJH-12)

	LLSS!ECLA 10				/(MJH-12)

	DAC	I.PCPB				/(MJH-12)

	LACQ					/(MJH-12)

	DAC	I.PCPB+1			/(MJH-12)

	JMP*	CONVRT				/(MJH-12)

/

/ SUBROUTINE PUTBLK -- WRITE OUT A DISK BLOCK

/

PUTBLK	0					/(MJH-12)

	CAL	I.PUTC				/(MJH-12)

	JMS	I.WFEV				/(MJH-12)

	JMP*	PUTBLK				/(MJH-12)

REMNOD=.

/ ********************

	.EJECT

/

	JMS*	(PENP)	/PICK AN EMPTY BEER CAN FROM THE POOL

	JMP	I.ER05	/AND SHOW AN ERROR IF NO LITTER IS AROUND

	DAC*	(R2)	/OTHERWISE, IF ONE IS FOUND, MAKE IT LOOK RESPECTABLE

	IAC		/BY CLEVERLY DISGUISING IS AS AN STL NODE FOR

	DAC*	(X11)	/THIS NEW TASK IN THE SYSTEM

	LAC	I.XM	/(MJH-12) ENTER XVM MODE BITS INTO STL NODE

	XOR	I.MXTR	/(MJH-12)

	DAC	I.MXTR	/(MJH-12)

	LAC	(I.TSKN-1)	/SET THE

	DAC*	(X10)	/TASK INFO IN THE

	LAW	-10	/STL NODE

	DAC	I.ACNT	/BY MOVING IT FROM THE NEAT BLOCK IT IS IN

	LAC*	X10	/FRESHLY PICKED

	DAC*	X11	/NODE

	ISZ	I.ACNT

	JMP	.-3

/

	LAC	(STKL)	/NOW ADD THIS TO

	DAC*	(R1)	/THE STL (R2 IS SET FROM ABOVE) (THANK GOD)

	JMS*	(NADD)

	CAL	DETACH	/DETACH DEVICE ON LUN 5

	CAL	I.WAIT

	LAC	TERM

	SAD	(15

LEAVE	CAL	REQTDV	/YES, REQUEST THE TDV ROUTINE

	CAL	(10)	/AND EXIT

/

REQTDV	1	/CPB TO REQUEST 'TDV...' KEYBOARD LISTENER

	0	/NO EV

	.SIXBT	'TDV...'

	0	/DEFAULT PRIORITY

/

/

/SEEK SUBORUTINE

/

SEEK	XX

	LAC	I.TSKN	/PICK UP THE

	DAC	DTSEEK+3

	LAC	I.TSKN+1

	DAC	DTSEEK+4	/TASK NAME AND PUT IT IN THE CPB

	CAL	DTSEEK	/SEEK THE FILE

	CAL	I.WAIT	/WAIT FOR THE EV

	LAC	I.EV	/WAS THIS ALL OK?

	SMA		/SKIP IF NOT

	JMP*	SEEK

	SAD	(-6)	/ONLY THAT THE FUNCTION IS NOT HONOURED?

	JMP*	SEEK	/YES

I.ER13	LAC	(I.ME13)	/NO, FILE NOT FOUND

	JMP	I.ERRR	/SHOW IT

/

/READ SUBROUTINE

/

READ	XX

	CAL	DTREAD	/READ A LINE

	CAL	I.WAIT	/WAIT FOR IT

	LAC	I.EV	/WHAT DOES THE ALL-KNOWING EV HAVE TO SAY?

	SPA		/SKIP IF IT SAYS ALL OK

	JMP	I.ER10	/JUMP FOR ERROR IF NOT

	LAC	INBUF	/SO FAR SO GOOD - NOW WHAT DOES THE HEADER SAY?

	AND	(77)	/SINGLE OUT THE GOODIE BITS

	SNA		/UH-OH - WE ARE SKIPPING IF SOME BITS ARE ON

	JMP*	READ	/NO SKIP - ALL OK

	ALS	14	/BRING THE CHECKSUM BIT TO AC0

	SPA!RAL		/SKIP IF NOT CHECKSUM

	JMP	I.ER10	/IT IS A CHECKSUM ERROR

	SPA		/SKIP IF NOT PARITY ERROR

	JMP	I.ER10	/PARITY ERROR, SHOW IT

	DZM	INBUF+2	/CLEAR THE RECORD TYPE, JUST IN CASE

	LAC	INBUF

	SAD	(1005)	/EOF?

	JMP*	READ	/YES, QUIT

	SAD	(1006)	/EOM?

	JMP*	READ	/YES, FORGET IT

I.ER10	LAC	(I.ME10)	/DECTAPE ERROR - (EOF OR EOM?) SAY SOMETHING

	JMP	I.ERRR

/  

/  

RDTDV   37     /CLEAR TDV

        I.EV

        FACLB

        42

/

/

/    FAC -- SUBROUTINE TO FETCH A CHARACTER FROM 5/7 ASCII LINE

/   BUFFER 'FACLB'.  CHARACTERS ARE NOT FETCHED BEYOND TERMINATORS.

/  

FAC     0

        LAC*    FACCBX   /FETCH NEXT UNPACKED CHAR FROM FACLB.

        SMA

        JMP     FAC2

        LAC     (FACCB-1)     /YES -- REFILL FACLB

        DAC     FACCBX

        LAC*    FACLBX   /(FIRST HALF OF WORD PAIR)

        ISZ     FACLBX

        LMQ

        CLA!CLL

        JMS     FACUPS  /(FIRST CHAR)

        JMS     FACUPS   /SECOND CHARACTER

        JMS     FACUPS   /SECOND HALF OF WORD PARIR

        LAC*    FACLBX   /SECOND HALF OF WORD PAIR

        ISZ     FACLBX

        LRS     17

        XOR*    FACCBX

        DAC*    FACCBX

        CLA

        JMS     FACUPS   /FOURTH CHAR

        JMS     FACUPS   /FIFTH CHAR

        LAC     (FACCB)  /RESET CHAR BUFFER INDEX

        DAC     FACCBX

        LAC*    FACCBX   /FETCH FIRST CHAR FROM BUFFER

FAC2    SAD     (015

        JMP*    FAC

        SAD     (175

        JMP*    FAC

        ISZ     FACCBX   /NON-TERM   AUGMENT CHARACTER

        JMP*    FAC      /BUFFER INDEX AND RETURN WITH CHAR IN AC

/

FACUPS  0             /UNPACHING S.R.  -- AC AND LIK MUST BE

        LLS     7      /CLEARED. NEXT CHAR MUST BE IN HIGH ORDER

        ISZ     FACCBX   /MQ, FACCBX MUST POINT TO WORD PREDEEDING

        DAC*    FACCBX   /CHAR TO BE STORED.

        CLA

        JMP*    FACUPS

/

        .EJECT

/

/ SUBROUTINE NUMBER -- READ A DECIMAL NUMBER OF UP TO 3 DIGITS

/			OFF THE MCR TTY.

/ 

/ ALTERED REGISTERS: AC AND MQ

/ 

/ CALLING SEQUENCE:

/		JMS	NUMBER

/		JMP	???	/RETURN HERE IF 1ST CHARACTER

/				/AFTER A BUNCH OF SPACES IS NOT

/				/A DECIMAL DIGIT WITH THE CHARACTER

/				/IN THE AC.

/		???	???	/RETURN HERE IF 1ST CHARACTER

/				/AFTER A BUNCH OF SPACES IS A DECIMAL

/				/DIGIT WITH THE BREAK CHARACTER IN THE

/				/AC AND THE NUMBER IN THE MQ.

/ 

NUMBER	0

	LAW	-3		/SET DIGIT COUNTER

	DAC	COUNT

	DZM	NUM		/ZERO PREVIOUS RESULTS

	CLC			/SET A FLAG TO INDICATE THAT SPACES

	DAC	NUMFLG		/ARE NOT BREAK CHARACTERS YET.

NUM1	JMS	FAC		/GET A CHARACTER

	SAD	(40		/WAS THE CHARACTER A SPACE?

	JMP	NUMSPC		/YES

	DZM	NUMFLG		/NO -- CLEAR FLAG TO INDICATE THAT ANY

				/SPACES ENCOUNTERED SHOULD BE USED AS

				/BREAK CHARACTERS.

	DAC	NUMT		/SAVE IT TEMPORARILY

	AAC	-60		/IS IT A DIGIT?

	SPA

	JMP	NUM2		/NO -- EITHER A BREAK OR AN ERROR

	DAC	CHAR		/SAVE THE POTENTIAL DIGIT

	AAC	-12

	SMA

	JMP	NUM2		/NO -- EITHER A BREAK OR AN ERROR

	LAC	NUM		/YES -- PICK UP THE REAL NUMBER

				/THAT HAS ALREADY BEEN CONSTRUCTED

	CLL

	MUL			/MULTIPLY IT BY 10 DECIMAL

	12

	LACQ			/GET RESULT INTO AC

	TAD	CHAR		/ADD THE DIGIT JUST READ

	DAC	NUM		/SAVE THE RESULTING DECIMAL NUMBER

	ISZ	COUNT		/HAVE 3 DIGITS BEEN READ?

	JMP	NUM1		/NO -- READ SOME MORE

	JMS	FAC		/YES -- READ A BREAK CHARACTER

NUM3	DAC	CHAR		/SAVE THE CHARACTER TEMPORARILY

	IDX	NUMBER		/PREPARE TO RETURN AT JMS+2

	LAC	NUM		/PICK UP THE DECIMAL NUMBER

	LMQ			/STORE IT IN THE MQ

	LAC	CHAR		/GET THE BREAK CHAR INTO THE AC

	JMP*	NUMBER		/RETURN AT JMS+2

NUM2	LAW	-3		/CHARACTER IS EITHER A BREAK OR ERROR

	SAD	COUNT		/IF THIS WAS THE 1ST CHARACTER READ

				/ITS AN ERROR. OTHERWIZE ITS A BREAK.

	JMP	NUMERR		/ERROR

	LAC	NUMT		/BREAK -- GET THE CHARACTER INTO AC

	JMP	NUM3

NUMERR	LAC	NUMT		/ERROR SO GET CHARACTER INTO AC

	JMP*	NUMBER		/AND RETURN AT JMS+1

NUMSPC	LAC	NUMFLG		/CHAR. WAS A SPACE -- IS IT A BREAK CHAR.?

	SZA

	JMP	NUM1		/NO -- THE SPACE SHOULD BE IGNORED

	LAC	(40		/YES -- TREAT THE SPACE AS A BREAK CHAR.

	DAC	NUMT

	JMP	NUM2

/

COUNT	0

NUM	0

NUMFLG	0

NUMT	0

CHAR	0

	.EJECT

	DAC	TERM		/SAVE THE REAL LINE TERMINATOR

/

/CPBS FOR MCR FUNCTION

/

ATTACH	2400	/ATTACH LUN 5

	I.EV	/FOR INPUT

	5

/

DTSEEK	3200	/SEEK THE FILE

	I.EV

	5

	.SIXBT	'@@@@@@TSK'

/

DTREAD	2600	/READ A LINE

	I.EV

	5

	0	/IN IOPS BINARY

	INBUF

	42

/

CLOSE	3400	/CLOSE THE FILE

	0

	5

/

DETACH	2500	/DETACH LUN 5

	I.EV

	5

/

TTMESG	2700	/WRITE AN ERROR MESSAGE TO THE TDV OPERATOR

	I.EV

	15

	2

TTMESA	XX

	42

/

I.ERRR	DAC	TTMESA

	CAL	TTMESG	/WRITE THE MESSAGE

	CAL	I.WAIT	/WAIT FOR THE EV

	LAC	I.EV	/PICK IT UP

	SMA		/SKIP IF ERROR

	JMP	ERRXIT	/DE-ALLOCATE THE DISK SPACE AND LEAVE

	SAD	(-777)	/OUT OF POOL?

	JMP	.-5	/YES, TRY UNTIL WE CAN DO IT

ERRXIT	LAC	I.DSKA	/HAS DISK SPACE BEEN ALLOCATED?

	SNA		/SKIP IF SO

	JMP	.+3	/OVER IF NOT

	CAL	I.DCPB	/DEALLOCATE IT IF SO

	CAL	I.WAIT

	CAL	DETACH	/DETACH LUN 5 - IT CAN'T HURT (CAN IT?)

	CAL	I.WAIT

	JMP	LEAVE	/REQUEST THE MCR LISTENER AND LEAVE

/

/

	.DEFIN	ABUF,TEXT,?B

	B-./2*1000+2 ; 0

	.ASCII	\@TEXT@\<15>

B=.

	.ENDM

I.ER02	LAC	(I.ME02)

	JMP	I.ERRR

I.ER03	LAC	(I.ME03)

	JMP	I.ERRR	/ERROR ROUTINES - PICK UP THE MESSAGE ADDRESS

I.ER05	LAC	(I.ME05)

	JMP	I.ERRR

I.ER06	LAC	(I.ME06)

	JMP	I.ERRR

I.ER09	LAC	(I.ME09)

	JMP	I.ERRR

I.ER12	LAC	(I.ME12)

	JMP	I.ERRR

I.ER14	LAC	(I.ME14)

	JMP	I.ERRR

/

/ERROR MESSAGES:

/

I.ME01	ABUF	<SYNTAX ERR>

I.ME02	ABUF	<TASK IN SYS>

I.ME03	ABUF	<PART CONFLICT>

I.ME05	ABUF	<OUT OF POOL>

I.ME06	ABUF	<OUT OF DISK>

I.ME09	ABUF	<SYS COM BLK ERR>

I.ME10	ABUF	<READ ERR>

I.ME11	ABUF	<DISK ERR>

I.ME12	ABUF	<NO DEFAULT PRIO>

I.ME13	ABUF	<FILE NOT FOUND>

I.ME14	ABUF	<INSUFF HARDW>

I.ME16  ABUF   <TDV ERR>

/

/SUBROUTINE TO WAIT FOR I.EV AND ANNOUNCE A DISK ERROR IF NEGATIVE WHEN

/COMPLETE.

/

I.WFEV	XX

	CAL	I.WAIT	/WAIT

	LAC	I.EV

	SMA		/ERRORS?

	JMP*	I.WFEV	/NO, LEAVE

I.ER11	LAC	(I.ME11)	/DISK ERROR

	JMP	I.ERRR	/ANNOUNCE IT AND CLEAN UP

/

/

/VARIABLES, CONSTANTS, AND CPBS WITH BUFFERS AS A SIDELINE

/

TERM	0

I.XM	0	/(MJH-12) XVM MODE BITS

I.ACNT	0	/SCRATCH LOCATIONS

I.TMP	0

I.BCNT	0

I.CCNT	0

I.WRK	0

I.DPNT	0	/POINTER USED PRIMARILY BY I.PUTW

I.MXDK	0	/MAXIMUM DISK BLOCK USED BY THE CURRENT LINK

I.THIS	0	/DISK ADDRESS OF CURRENT BLOCK IN CORE

I.WRIT	0	/-1 WHEN CURRENT BLOCK HAS BEEN MODIFIED, 0 IF NOT

I.DSKA	0	/INDICATOR THAT THE DISK AREA HAS BEEN ALLOCATED (0 IF NOT)

I.LBSE	0	/DISK BASE ADDRESS FOR CURRENT LINK

I.LCOR	0	/CORE ADDRESS CORRESPONDING TO I.LBSE

I.LKNM	0	/NUMBER OF LINK BEING SOUGHT BY I.FLNK

I.PTNM	0 ; 0   /PARTITION NAME

I.TOTP	0	/COUNTER FOR PATCH RECORDS

I.LTBS	0	/LINK TABLE BASE ADDRESS

/THE FOLLOWING ARE NEEDED FOR STL NODE BUILDING:

I.TSKN	0 ; 0   /NAME OF TASK

I.DFPR	0	/PRIORITY OF TASK

I.PBAD	0	/PARTITION DESCRIPTOR BLOCK ADDRESS

I.DSKB	0	/DISK BASE ADDRESS

I.RISZ	0	/RESIDENT IMAGE SIZE

I.MXTR	0	/MAXIMUM TASK REGISTER (CHANGED TO SIZE FOR STL NODE)

I.ENTR	0	/TASK ENTRY PC (WITH BANK/PAGE AND EXEC/NORM MODE BITS)

/

I.BCBS	0	/BASE OF BLANK COMMON FOR PATCHING

I.PNTR	0	/POINTER USED BY I.GETW

I.CORB	0	/CORE BASE ADDRESS (CORRESPONDING TO I.DSKB)

/

I.WAIT	20	/CPB FOR WAITING

	I.EV		/FOR THE EV

/

I.EV	0	/GENERAL PURPOSE EV

/

I.ACPB	1500	/ALLOCATE DISK SPACE CPB

	I.EV

	1	/ALLOCATE ON DISK - LUN 1

	I.ALSZ	/ADDRESS OF ALLOCATE/DEALLOCATE DISK CONTROL TABLE

/

I.DCPB	1600	/DEALOCATE DISK SPACE CPB (IN CASE OF ERRORS)

	I.EV

	1

	I.ALSZ	/OTHERWISE, SAME AS I.ACPB

/

I.ALSZ	0	/ALLOCATE/DEALLOCATE CONTROL TABLE

	0 ; 0

/

ALLCTA	400	/ALLOCATE FOR SRI

	XX

	XX

/

/

I.GETC	3000	/GET (DISK) CPB

	I.EV

	1

	I.PCPB	/GET/PUT CONTROL TABLE

/

I.PUTC	3100	/PUT (DISK) CPB

	I.EV

	1

	I.PCPB	/SAME AS I.GETC

/

I.PCPB	0	/GET/PUT CONTROL TABLE

	0	/DISK ADDRESS IS PUT HERE

	I.BLOK	/ALL I/O TO/FROM DISK IS DONE THROUGH THE I.BLOK BUFFER

	400	/AND IS EXACTLY ONE BLOCK LONG

/

/

FACLBX	FACLB+2

FACCBX	FACCB+5

FACCB	.BLOCK 5

	-1

FACLB=.

INBUF	.BLOCK	42	/INPUT BUFFER

	.ASCII <15>

	.END	INSTAL

	.ENDC
