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	TV	FORINI	INITIALIZE FOROTS LOWSEG, 7(3260)
	SUBTTL	/DAW/JLC/AHM/BL	18-Nov-82

; Previous authors (before V6)
;	D. TODD/DRT/HPW/DMN/MD/JNG/SWG/CAL

;COPYRIGHT (C) DIGITAL EQUIPMENT CORPORATION 1981, 1983

;THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED AND COPIED
;ONLY  IN  ACCORDANCE  WITH  THE  TERMS  OF  SUCH LICENSE AND WITH THE
;INCLUSION OF THE ABOVE COPYRIGHT NOTICE.  THIS SOFTWARE OR ANY  OTHER
;COPIES THEREOF MAY NOT BE PROVIDED OR OTHERWISE MADE AVAILABLE TO ANY
;OTHER PERSON.  NO TITLE TO AND OWNERSHIP OF THE  SOFTWARE  IS  HEREBY
;TRANSFERRED.

;THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE WITHOUT  NOTICE
;AND  SHOULD  NOT  BE  CONSTRUED  AS A COMMITMENT BY DIGITAL EQUIPMENT
;CORPORATION.

;DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR RELIABILITY  OF  ITS
;SOFTWARE ON EQUIPMENT WHICH IS NOT SUPPLIED BY DIGITAL.

COMMENT \

***** Begin Revision History *****

***** Begin Version 6 *****

1262	DAW	 9-Feb-81
	Allow FORINI to run in a non-zero section. (Assumes
	that all code is in the same section).

1530	JLC	10-Jul-81
	FOROTS becomes FOROT6.

1623	DAW	21-Aug-81
	Entry point RESET$ to test extended addressing in FOROTS.

2005	JLC	15-Oct-81
	Added REENTER code. Make DDT-20 understand symbol tables
	at other than 400000.

2007	JLC	16-Oct-81
	Fixed temp stack to be larger for reenter code.

2033	DAW	19-Nov-81
	Fixed problems in REENTER code.

***** Begin Version 7 *****

3035	JLC	29-Jan-81
	FOROT6 becomes FOROT7.

3056	JLC	23-Mar-82
	Rework lowseg/hiseg dispatch, save ACs in lowseg.

3101	JLC	5-Apr-81
	Modified lowseg/hiseg interface - address of user's ACs
	are now passed in F instead of T1.

3102	JLC	7-Apr-82
	Fix OTS/NONSHAR, INIT call was going to 0. Slightly modify
	passing of return address of RESET. - PDL is now in
	the lowseg.

3103	JLC	8-Apr-82
	More minor changes to lowseg/hiseg interface. Stack setup
	is now done totally in FORINI.

3122	JLC	28-May-82
	Change lowseg/hiseg interface again. Now uses 2-word entries.

3123	JLC	29-May-82
	Modified interface again to make it faster.

3125	JLC	3-Jun-82
	Moved AC save routine to hiseg again.

3137	AHM	30-Jun-82
	Development patches for running entirely in a non-zero section
	for V8.  If .JBSA in  RESET.'s section contains 0,  synthesize
	reasonable numbers to put in  JOBDAT for the current  section.
	Do XGVEC% and XSVEC% to  save and restore the program's  entry
	vector.  Set  up a  global  stack pointer  when running  in  a
	non-zero section.  Don't pass the  address of AU.ACS to  INIT.
	in F, since it isn't used any more.

3156	AHM	21-Jul-82
	Don't do XGVEC% and XSVEC% unless we are running in a non-zero
	section so that we can run UNDER Tops-20 release 4.1 on a  KS.
	Also, do private OPDEFs of  PDVOP%, XGVEC% and XSVEC% so  that
	FORINI will assemble with release 4.1 MONSYM.

3163	AHM	24-Aug-82
	Make FAKJBD a little more paranoid about blamming the location
	that 770001 references with a symbol table pointer by checking
	770000 for  JRST  770002 ala  EXEC  and OVRLAY.   Use  section
	defaulting in RPACS% calls.  Don't zero left half of .JBREN.

3177	BL	14-Sep-82
	Store DBMS entry vector at .JBBLT.

3202	JLC	26-Oct-82
	Install non-skip (error) return from CLOSF.

3205	AHM	28-Oct-82
	Add code under IF20 conditional to define %SRTAD (SORT's start
	address) here, zero it upon restart, and toss the section that
	SORT is in, if it owns its own section.

3220	AHM	18-Nov-82
	Replace non-zero section tests that depended upon the sign  of
	the stack pointer  with a check  that uses XMOVEI  so that  we
	know which section we are currently executing in.

3231	JLC	14-Dec-82
	RESET. becomes FOROK. for new DBMS interface.

3235	AHM	16-Dec-82
	Fix ACs for entry vector JSYS call around code to GET% FOROTS.

3236	JLC	17-Dec-82
	Move setup of FUNCT. in .JBBLT to FORMEM.

3244	JLC	30-Dec-82
	Moved setup of FUNCT. back into FORINI, as PORTAL is
	almost inaccessible from hiseg. Changed the name of
	DBSTP$ to a FOROTS entry, resolved by a file later
	in FORLIB if DBMS program, resolved to dummy one if
	no DBMS program.

3245	JLC	4-Jan-82
	Look at %DBSTP to determine whether to GETSEG FOROT7.EXE
	or FDBOT7.EXE.

3246	JLC	5-Jan-83
	Put PORTAL back here.

3252	JLC	12-Jan-83
	Move KSORT to FORSRT.MAC.

3253	JLC	13-Jan-83
	Change %FRSNONSHARE to %FRSNS. Change %FRSLOAD to %FRSLO.
	Fix CLSFIL to set up 'STOP!!' on stack to stop traceback loop.

3254	CKS	13-Jan-83
	Do not set up .JBHSO so that FOROTS symbols will not be seen by DDT
	unless user explicitly requests them by setting up .JBHSO.

3260	JLC	17-Jan-83
	Make KSORT an EXTERN on the -10 so it will be drawn in to
	get %SRTAD.

***** End Revision History *****

\

;THIS MODULE IS REACHED IF LINK DOES NOT DEFINE FOROT%, THAT IS, IF
;WE ARE LOADING /OTS:NONSHARE OR WITH /SEARCH. THIS MODULE IS HERE
;TO REMOVE ALL OTHER TRACES OF THE SYMBOL FOROT% FROM FOROTS.
;IT DEFINES THE SWITCH %FRSNS, WHICH PREVENTS RESOLUTION
;OF THE SYMBOL %FRSLO, WHICH IS AN ENTRY IN FOROTS.RLR IN FORLIB.

	ENTRY	FOROT%

	EXTERN	%FRSLO

	INTERN	%FRSNS

%FRSNS==0
FOROT%==<EXP %FRSLO>


	PRGEND

	SEARCH	FORPRM
	TV	FORSHR

;THIS MODULE IS TO IMPLEMENT /DEFINE:%FRSNS AS A AN
;EVENTUAL SUBSTITUTE FOR /OTS:NONSHARE, AND TO MAKE IT COEXIST
;WITH FOROT%, WHICH IS DEFINED BY /OTS:SHARABLE.
;SPECIFYING /DEFINE:%FRSNS BY ITSELF HAS A
;PECULIARITY DUE TO LINK THINKING THAT THE PROGRAM
;IS GOING TO USE SHARABLE FOROTS: IT MAKES EVERYTHING,
;INCLUDING FOROTS, /SEG:LOW.

	ENTRY	%FRSNS

	INTERN	%FRSLO

%FRSNS==0
%FRSLO==0

	PRGEND

	SEARCH	FORPRM
	TV	FORGET	GETSEG FOROTS

	SEGMENT	CODE

	EXTERN	%FRSLOAD,%DBSTP,KDBMS.,KSORT.
	INTERN	CHRPT.

	ENTRY	FOROT.,FOROT$,ERROR.

ERROR.=FORER.

IF20,<
	OPDEF	XGVEC%	[JSYS 606] ;[3156] Get extended entry vector info
	OPDEF	XSVEC%	[JSYS 607] ;[3156] Set extended entry vector info
> ; End of IF20

;RESET. WILL GETSEG FOROTS IF IT WAS NOT LOADED WITH THE PROGRAM.
;THE SYMBOL %FRSLO IS USED TO DECIDE IF FOROTS HAS BEEN LOADED.
;IF %FRSNS HAS NOT BEEN DEFINED, IT IS RESOLVED IN
;FORSHR AS 0. IF %FRSNS HAS BEEN DEFINED, EITHER BY
;THE LINK COMMAND STRING OR INDIRECTLY BY SPECIFYING /OTS:NONSHAR,
;IT IS RESOLVED IN FOROTS.RLR AS THE DISPATCH TABLE ADDRESS
;
;CALL:
;	JSP	16,RESET.
;	 0			;ARG, IGNORED
;
;RETURNS WITH FOROTS PRESENT AND INITIALIZED.  SETS UP P.
;CAN DESTROY ALL ACS

IF10,<
FOROT$:
> ;END IF10
FOROT.:	PORTAL	.+1		;ALLOW ENTRY FROM PUBLIC

RESET0:	MOVE	T1,[JRST FUNCT.] ;SETUP JUMP TO FUNCT.
	MOVEM	T1,.JBBLT	;WHERE DBMS CAN USE IT
				;Another label (used by RESET$)
	XMOVEI	P,INIPDL	;[3137] Set up a global stack
	TLNN	P,-1		;[3137] Is there a section number ?
	 MOVE	P,[IOWD LPDL,INIPDL] ;[3137] No, use a local stack

	PUSH	P,['STOP!!']	;FLAG BOTTOM OF STACK FOR TRACEBACK
	PUSH	P,L		;PUSH RETURN ADDR FROM JSP
	MOVEM	0,U.ACS		;SAVE USER'S ACS
	MOVSI	0,1
	HRRI	0,U.ACS+1
	BLT	0,U.ACS+17
	SETZM	CHRPT.		;CLEAR THE CHAR STACK PNTR
	PUSHJ	P,KDBMS.		;KILL PREVIOUS TRACES OF DBMS

IF20,<
	PUSHJ	P,KSORT.	;[3205] Get rid of SORT, if it is present

	XMOVEI	T1,0		;[3220] See what section the ACs are in
	JUMPE	T1,JOBOK	;[3220] Don't try to fake JOBDAT in section 0
	SKIPN	.JBSA		;[3137] No JOBDAT?  If so, should have a PDV
	 PUSHJ	P,FAKJBD	;[3137] Yes, fake up JOBDAT from PDV for V8

JOBOK:	MOVEI	T1,.FHSLF	;[3137] Reference this fork
	XMOVEI	T2,0		;[3220] See what section the ACs are in
	JUMPE	T2,S0GVEC	;[3220] Do a GEVEC% if we are in section 0
	XGVEC%			;[3137] Get entry vector length and address
	JRST	S1GVEC		;[3156] Interpret the entry vector
S0GVEC:	GEVEC%			;[3156] Get entry vector info using old call
	HRRZ	T3,T2		;[3235] Put the address where XGVEC% puts it
	HLRZ	T2,T2		;[3235] Put the length in the right half
S1GVEC:	DMOVEM	T2,SAVET	;[3137] Save info - GET% wrecks it
	CAIE	T2,(JRST)	;[3137] Real entry vector?
	 CAIG	T2,1		;[3137] Yes, big enough?
	  JRST	NOENTV		;No, just store address in .JBREN
	SKIPN	T1,1(T3)	;[3137] Get reenter instruction
	 MOVE	T1,[JRST EXICAL];USE OURS IF NONE
	CAMN	T1,[JRST CLSFIL] ;Already setup? (Program re-started?)
	 JRST	FOROK		;Yes, skip this.
	TLNN	T1,-1		;ANY OPCODE?
	 HRLI	T1,(JRST)	;NO. PUT IN A JRST
	MOVEM	T1,USEREN	;TO EXECUTE AFTER %EXIT1
	MOVE	T1,[JRST CLSFIL];USED TO CLOSE ALL FILES
	MOVEM	T1,1(T3)	;[3137] When user types "@REENTER"
>;END IF20

NOENTV:	SKIPN	T1,.JBREN	;DOES USER HAVE .JBREN ADDR?
	 MOVEI	T1,EXICAL	;NO. USE AN EXIT CALL
	HRRZ	T2,T1		;Did we already do this?
	CAIN	T2,CLSFIL
	 JRST	FOROK		;Yes, don't do it again.
	HRLI	T1,(JRST)	;MAKE IT A LOCAL INSTRUCTION
	MOVEM	T1,USEREN	;TO EXECUTE AFTER %EXIT1
	MOVEI	T1,CLSFIL	;[3137] Used to close all files
	HRRM	T1,.JBREN	;[3137] When user types "REENTER"

FOROK:	SKIPE	T1,FBASE	;FOROTS ALREADY GETED?
	 JRST	FINIT		;YES. GO THERE
	SKIPN	T1,[%FRSLOAD]	;NO. DOES IT WANT A HISEG?
	 JRST	GOGET		;YES. GO AND GET IT
	XMOVEI	T1,(T1)		;NO. GET IT'S EXTENDED ADDR
	XMOVEI	T2,RBASE	;GET EXTENDED ADDR OF TABLE OFFSET
	SUB	T1,T2		;SUBTRACT TABLE OFFSET
	MOVEM	T1,FBASE	;SAVE IT
	JRST	FINIT		;AND GO THERE

GOGET:
IF10,<
	JS.XO==2000		;JBTSTS BIT, JOB IS EXECUTE ONLY

	HRROI	T1,.GTSTS	;GET JOB STATUS
	GETTAB	T1,
	  SETZ	T1,		;CAN'T, ASSUME NOT EXECUTE ONLY
	TRNN	T1,JS.XO	;EXECUTE ONLY?
	  TDZA	T2,T2		;NO
	MOVEI	T2,UU.PHY	;YES, SET FOR PHYS-ONLY GETSEG

	MOVE	T1,%DBSTP	;GET INSTRUCTION AT DBSTP$
	CAMN	T1,[POPJ P,]	;IS IT THE "REAL" DBSTP$?
	 JRST	GFOROT		;NO. JUST GET FOROTS

	MOVEI	T1,['SYS   '	;YES. GET FDBOTS INSTEAD
		    'FDBOT7'
		    EXP 0,0,0,0]
	JRST	DOGETS		;GO DO GETSEG

GFOROT:	MOVEI	T1,['SYS   '	;GETSEG FOROTS
		    'FOROT7'
		    EXP 0,0,0,0]

DOGETS:	GETSEG	T1,(T2)
	  HALT			;FAILED, TYPE MONITOR ERROR MESSAGE

	MOVE	P,U.ACS+P	;GETSEG WRECKED P, GET IT BACK

	MOVE	T1,[-2,,.GTUPM]	;GET BASE ADDRESS OF HIGH SEG (FOROTS)
	GETTAB	T1,
	 $FCALL	SNH,EXICAL	;CAN'T FAIL
	HLRZ	T1,T1		;PUT IN RIGHT HALF
	TRZ	T1,777		;CLEAR EXTRA BITS
	TRO	T1,10		;START ADDRESS IS XXX010
	SUBI	T1,RBASE	;SUBTRACT TABLE OFFSET
	MOVEM	T1,FBASE	;STORE FOR LATER

	JRST	FINIT		;START UP FOROTS
> ;IF10

IF20,<
	MOVX	T1,RF%LNG+.FHSLF ;FUNNY CALL,,THIS FORK
	MOVEI	T2,STBLK	;POINT TO FORK STATUS BLOCK
	RFSTS%			;READ FORK STATUS
	SKIPL	STBLK+.RFSFL	;SEE IF WE ARE EXECUTE ONLY
	  SKIPA	T1,[GJ%SHT+GJ%OLD] ;NO, SET UP FOR REGULAR GTJFN
	MOVX	T1,GJ%SHT+GJ%OLD+GJ%PHY	;YES, SET UP FOR PHYSICAL-ONLY GTJFN
	HRROI	T2,[ASCIZ /SYS:FOROT7.EXE/]
	GTJFN%
	  ERJMP	RERR

	HRLI	T1,.FHSLF	;THIS FORK
	TRO	T1,GT%NOV	;ERROR IF PAGES ALREADY EXIST
	XMOVEI	T2,GARGBL	;Point to GET arg block
	TLNE	T2,-1		; Needed?
	 PUSHJ	P,GTFRS1	;SETUP FOR SECTION 1 GET%
	GET%			;GET FOROTS
	  ERJMP	RERR

	MOVEI	T1,.FHSLF	;THIS FORK
	GEVEC%			;GET FOROTS ENTRY VECTOR

	HRRZI	T2,(T2)		;LOCAL ADDR ONLY
	HRRZ	T1,(T2)		;GET "START" ADDRESS
	XMOVEI	T3,(T1)		;GET EXTENDED ADDR
	XMOVEI	T4,RBASE	;GET EXTENDED ADDR OF TABLE OFFSET
	SUB	T3,T4		;SUBTRACT TABLE OFFSET
	MOVEM	T3,FBASE	;SAVE BASE ADDRESS OF DISPATCH VECTOR
	HLRZ	T2,.JBHRN-.JBHDA(T1) ;ADD HIGH SEGMENT LENGTH
	ADDI	T2,-.JBHDA-1(T1) ;TO HISEG ORIGIN-1
	HLL	T2,.JBHRN-.JBHDA(T1) ;MAKE .JBHRL LOOK LIKE ON THE -10
	SKIPN	.JBHRL		;AND IF THE USER DIDN'T HAVE ONE
	 MOVEM	T2,.JBHRL	;SAVE FOR DDT

IFN 0,<				;[3254] USE THIS FOR DEBUGGING; REMOVED FOR
				;[3254] PRODUCTION
	XMOVEI	T1,(T1)		;GET EXTENDED ADDR
	LSH	T1,-9		;CREATE PAGE ADDR
	SKIPN	.JBHSO		;AND IF THE USER DOESN'T HAVE ONE
	 MOVEM	T1,.JBHSO	;SAVE THE FOROTS HIGH SEG ORIGIN FOR DDT
> ;IFN

	MOVEI	T1,.FHSLF	;THIS FORK
	DMOVE	T2,SAVET	;[3137] Put real entry vector back
	XMOVEI	T4,0		;[3220] See what section the ACs are in
	JUMPE	T4,S0SVEC	;[3220] Do a SEVEC% if we are in section 0
	XSVEC%			; SO ^C, START WORKS
	JRST	FINIT		;GO DO FOROTS INITIALIZATION

S0SVEC:	HRLZ	T2,T2		;[3235] Put the size in the left half
	HRR	T2,T3		;[3235] Put the address in the right half
	SEVEC%			;[3156] Set the entry vector with an old call
	JRST	FINIT		;[3156] Go do FOROTS initialization

;Definitions in R5 MONSYM
GT%ARG==1B22			;Arg block supplied for GET
GT%BAS==1B2			;BASE-address word supplied in arg block

;Call here to do setup for GET% into section 1 only
GTFRS1:	HLRZM	T2,GARGBL+3	;Save section number to GET into
	MOVX	T3,GT%BAS	;Tell monitor which word to use
	MOVEM	T3,GARGBL
	TXO	T1,GT%ARG	;Remember we have an arg block
	POPJ	P,		;Back to main code

RERR:	HRROI	T1,RERRBF	;POINT TO MESSAGE BUFFER
	HRLOI	T2,.FHSLF	;THIS FORK,,LAST ERROR
	MOVSI	T3,-^D80	;LIMIT OF 80 CHARS
	ERSTR%			;GET ERROR STRING
	 JRST	[HRROI T1,[ASCIZ /Undefined error number/]
		 JRST RQUIT]
	  SKIPA	T1,[-1,,[ASCIZ /Error in ERSTR/]]
	HRROI	T1,RERRBF

RQUIT:	MOVEM	T1,SAVET	;SAVE T1 FOR A WHILE
	HRROI	T1,[ASCIZ /Can't get FOROT7.EXE/]
	ESOUT%			;TYPE EXPLANATION
	MOVE	T1,SAVET	;GET POINTER BACK
	ESOUT%			;TYPE ERROR STRING
	HALTF%			;QUIT AND DON'T CONTINUE
	JRST	.-1
> ;IF20

FINIT:	XMOVEI	D,%DBSTP 	;PASS ADDRESS OF DBSTP$ OR POPJ P,
	JRST	INIT.

CLSFIL:

IF10,<
	OUTSTR	CLSMSG		;GIVE USER A MSG
	INCHWL	T1		;GET THE FIRST CHAR
	CLRBFI			;CLEAR TYPE-AHEADS
>;END IF10

IF20,<
	MOVE	T1,[POINT 7,CLSMSG] ;GIVE USER A MSG
	PSOUT%
	MOVE	T1,[TXIBLB,,TXIBLK] ;Copy args to TXIBLK
	BLT	T1,TXIBLK+.TXLEN-1
	XMOVEI	T1,TXIBLK	;SETUP FOR TEXTI
	TEXTI%
	 JFCL			;?Failed

;Clear input buffer.

	MOVEI	T1,.PRIIN	;Get terminal designator
	CFIBF%			;Clear input buffer
	 ERJMP	.+1		;Ignore error

	LDB	T1,[POINT 7,YESWRD,6] ;GET THE 1ST CHAR
>;END IF20

;Here with first char of response in T1.

	CAIE	T1,"Y"		;IS IT YES
	 CAIN	T1,"y"
	  JRST	DOCLS		;YES, IT'S YES
	JRST	NDOCLS		;NO. IT'S NOT

DOCLS:	MOVE	P,[IOWD LPDL,INIPDL] ;SET UP STACK
	PUSH	P,['STOP!!']	;FLAG BOTTOM OF STACK FOR TRACEBACK
	XMOVEI	L,[1+[EXP 0,0]]	;NULL ARGS
	PUSHJ	P,EXIT1.	;CLOSE ALL FILES
NDOCLS:	XCT	USEREN		;EXECUTE REENTER INST

IF20,<
EXICAL:	MOVNI	T1,1		;CLOSE ALL OTHER FILES
	CLOSF%
	 $FCALL	IOE		;REPORT WHATEVER ERROR IT IS
	HALTF%			;STOP FOROTS
	JRST	.-1		;AND STAY THAT WAY
>

IF10,<
EXICAL:	EXIT			;HALT FOROTS
>

IF20,<
TXIBLB:	4			;LENGTH FOLLOWING
	RD%TOP!RD%JFN		;STOP ON TOPS-10 STYLE CODES
	.PRIIN,,.PRIOU		;INPUT,,OUTPUT
	POINT 7,YESWRD		;THE ANSWER POINTER
	5			;5 BYTES MAX
.TXLEN==.-TXIBLB		;Length of block

TXIBLK:	BLOCK	.TXLEN		;Real TEXTI block.
>;END IF20

CLSMSG:	ASCIZ /Do you want to close all files? (Y or N):/

;DISPATCH VECTOR.  JUMP TO APPROPRIATE PLACE IN FOROTS DISPATCH VECTOR

DEFINE	Y (E) <
	ENTRY	E'.
	SIXBIT	/E'./
E'.:	PUSHJ	P,RDISP
>

DEFINE	X (E) <
	ENTRY	E'.
	SIXBIT	/E'./
E'.:	PUSHJ	P,RDISP
>

	XALL
RVEC:	FORVEC
	SALL

RBASE==RVEC+1			;LOCAL RETURN PC-1 ON CALL FROM 1ST ENTRY

;THE FOLLOWING LOWSEG/HISEG INTERFACE ALLOWS FORDSP TO BE IN
;A DIFFERENT SECTION THAN FOROTS. FBASE IS THE ENTRY VECTOR
;ADDRESS, MINUS THE OFFSET OF THE TRANSFER VECTOR TABLE (RVEC).
;RDISP JUST DOES A JUMP TO FOROTS, WITHOUT SAVING ANY AC'S.
;IT IS EXPECTED THAT EITHER THE AC'S ARE STORED SEPARATELY (E.G. INIT)
;OR STORED BY THE HISEG ENTRY POINT
RDISP:	EXCH	0,(P)		;GET RETURN ADDR, SAVE 0
	ADD	0,FBASE		;RELOCATE TO FOROTS ENTRY POINT
	EXCH	0,(P)		;GET 0 BACK, SAVE ENTRY POINT
	POPJ	P,		;GO TO IT

	SUBTTL	RESET$ - MAP SECTION 0 AND 1 TOGETHER

;This is a temporary entry point to test extended addressing FOROTS
;RESET$ maps sections 0 and 1 together, then returns to RESET0

IF20,<
FOROT$:	PORTAL	.+1		;Allow call from public page
	SKIPE	FBASE		;WAS FOROTS GOTTEN ALREADY?
	 JRST	RESET0		;YES. NOTHING TO DO
	DMOVEM	0,U.ACS	;Save a few acs
	DMOVEM	2,U.ACS+2

	SETZ	T1,		;Create private section
	MOVE	T2,[.FHSLF,,1]	;Section 1
	MOVX	T3,PM%RD!PM%WR+1 ;Read Write and one section
	SMAP%			;** Create section 1 **
	 ERJMP	NOSC1		;Can't

	MOVE	T1,[.FHSLF,,0]	;Want to map section 0
	MOVE	T2,[.FHSLF,,1000] ;Into other section
	SKIPE	[%FRSLOAD]	;Is FOROTS loaded?
	 JRST	RSTFLD		;Yes

	MOVX	T3,PM%RWX!PM%CNT+400 ;All lowseg
	PMAP%			;Make the two sections the same
	 ERJMP	CNTMP1		;Can't map pages to section 1
	MOVE	T1,[.FHSLF,,765] ;Also copy DDT if present
	MOVE	T2,[.FHSLF,,1765]
	MOVX	T3,PM%RWX!PM%CNT+13
	PMAP%
	 ERJMP	CNTMP1

	XJRSTF	[EXP 0,<1,,.+1>] ;Enter extended addressing
	JRST	RSTGO		;Go do FOROTS initialization

NOSC1:	HRROI	T1,[ASCIZ/?FRSNS1 Can't put myself in section 1, reason:
 Can't create section 1 with SMAP%
/]
	PSOUT%
	JRST	RSTGO		;Go anyway

CNTMP1:	HRROI	T1,[ASCIZ/?FRSCM1 Can't put myself in section 1, reason:
 Can't PMAP section 0 to section 1
/]
	PSOUT%
	JRST	RSTGO		;Go do regular RESET.

;HERE IF FOROTS LOADED AND WE WANT TO GO TO SECTION 1.
;Setup T3 for PMAP% and do it.

RSTFLD:	MOVX	T3,PM%RWX!PM%CNT+1000 ; The whole section
	PMAP%
	 ERJMP	CNTMP1
	XJRSTF	[EXP 0,<1,,.+1>] ;Enter extended addressing
;	JRST	RSTGO		;Go do FOROTS initialization


RSTGO:	DMOVE	0,U.ACS		;Restore acs
	DMOVE	2,U.ACS+2
	XMOVEI	16,(16)		;Get section # in LH(16)
	JRST	RESET0		;Entry at RESET0
>;END IF20

	SUBTTL	FAKJBD - Fake up a JOBDAT from the PDV

; This is  a temporary  subroutine used  to test  extended  addressing
; FOROTS.  If we are  running entirely in section  1 because LINK  has
; loaded us  there directly,  then there  is no  JOBDAT area.   During
; extended addressing development it should be sufficient to read  the
; data from the  PDV and  store it  into the  locations 1,,20  through
; 1,,137 that have been  deliberately left alone to  leave room for  a
; JOBDAT by setting the .CODE. psect origin to 1,,140.

; Added by edit 3137

IF20,<
	OPDEF	PDVOP%	[JSYS 603] ;[3156] Manipulates program data vectors

;[3156] PDVOP% function codes accepted in AC1
	.POGET==0		;[3156] Get a set of PDVAs
				; (Program Data Vector addresses)
;[3156] Arg block offsets for block addressed by AC2
	.PODAT==3		;[3156] Address of data block

;[3156] Offsets defined within program data vectors
	.PVSTR==2		;[3156] Program starting address
	.PVREE==3		;[3156] Program reenter address
	.PVVER==4		;[3156] Program version number
	.PVMEM==5		;[3156] Address of a block describing
				;[3156]  program memory
	.PVSYM==6		;[3156] Address of the program symbol table

FAKJBD:	XMOVEI	T1,PDVA		;Get global address of word to get PDVA
	MOVEM	T1,PDVARG+.PODAT ;Store in arg block
	MOVX	T1,.POGET	;Function to get the address of the PDV
	XMOVEI	T2,PDVARG	;Point to the argument block
	PDVOP%			;Get the PDV's address
	 ERJMP	PDVPNT		;Can't, return
	MOVE	P1,PDVA		;Put the address in a handy place

	MOVE	T1,.PVSTR(P1)	;Get the starting address
	HRRZM	T1,.JBSA	;Store in section local format
	MOVE	T1,.PVREE(P1)	;Get the reenter address
	HRRM	T1,.JBREN	;[3163] Store it in section local format
	MOVE	T1,.PVVER(P1)	;Get the version number
	MOVEM	T1,.JBVER	;Store it

	MOVE	P2,.PVSYM(P1)	;Get symbol table pointer
	MOVEM	P2,.JBSYM	;Save it away.  (Should be 30 bit address, but
				; LINK sets it to be an IOWD and DDT needs the
				; count anyhow)
	MOVX	T1,<.FHSLF,,770> ;[3163] Our fork,,page 770 in this section
	RPACS%			;Get the page info
	 ERJMP	MEMIN		;Don't bother if it isn't there
	TXNN	T2,PA%PEX	;Does the page exist ?
	 JRST	MEMIN		;[3163] No, don't store into page
	MOVE	T1,770000	;[3163] Get first instruction in DDT (maybe)
	CAMN	T1,[JRST 770002] ;[3163] Look familiar ?
	 MOVEM	P2,@770001	;Yes, give symbol table pointer to DDT

; Use the memory map  pointed to by .PVMEM  instead of this code  when
; LINK puts something in it.

; Rewritten to take advantage of section defaulting by edit 3163.

MEMIN:	MOVEI	P2,764		;Lowest page DDT could touch
MEMLP:	MOVE	T1,P2		;Get the page number
	HRLI	T1,.FHSLF	;Read our fork's page map
	RPACS%			; from the monitor
	 ERJMP	MEMDEF
	TXNE	T2,PA%PEX	;Does the page exist ?
	 AOJA	P2,MEMXIT	;Yes, we have found the last used page
	CAIE	P2,300		;Are we at local page 300 ?
	 SOJA	P2,MEMLP	;No, try the next page
MEMDEF:	SKIPA	P2,[400000]	;Failed - assume .DATA. stops at 400000
MEMXIT:	 LSH	P2,^D9		;Convert back into address
	HRLM	P2,.JBSA	;Store initial first free location
	HRRM	P2,.JBFF	;Store first free location
	SOJ	P2,		;Before that is verboten
	HRRZM	P2,.JBREL	;Set lowseg lower bound
PDVPNT:	POPJ	P,

>;END IF20

	SEGMENT	DATA

CHRPT.:	BLOCK	1		;CHARACTER STACK PNTR
FBASE:	BLOCK	1		;FOROTS BASE ADDR MINUS TABLE OFFSET
SRETAD:	BLOCK	1		;RETURN ADDR OF CALL TO SDISP
U.ACS:	BLOCK	20		;USER ACS
INIPDL:	BLOCK	LPDL		;FOR NOW THE PERM PDL
USEREN:	BLOCK	1		;USER REENTER ADDR
YESWRD:	BLOCK	1		;WORD FOR USER RESPONSE

IF20,<

STBLK:	5			;LENGTH OF RFSTS BLOCK
	BLOCK	4		;RFSTS BLOCK
GARGBL:	BLOCK	4		;"GET" arg block

RERRBF: BLOCK	^D80/5		;BUFFER FOR ERROR MESSAGE
SAVET:	BLOCK	2		;[3137] Random temp (no stack yet)

PDVARG:	EXP	PDVLEN		;[3137] Length of the block
	EXP	.FHSLF		;[3137] This process
	EXP	PDVALN		;[3137] Data block length
	BLOCK	1		;[3137] Address of associated data block (PDVA)
	PDVLEN==.-PDVARG	;[3137] Length of this block
				;[3137] 
PDVA:	BLOCK	1		;[3137] Gets address of PDV
	PDVALN==.-PDVA		;[3137] Length of this block

> ;END IF20

	END