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TITLE MAPURE-PAGE LOADER
RELOCATABLE
MAPCH==0 ; channel for MAPing
XJRST==JRST 5,
.GLOBAL PURVEC,PURTOP,PURBOT,P.TOP,GCSTOP,FRETOP,MUDSTR,STRTO6,PLOAD,AGC,GCDOWN
.GLOBAL SQUTOA,IGVAL,IBLOCK,PURCLN,MOVPUR,GETPAG,GCFLG,NOSHUF,DIR,NDIRS,SQUPNT
.GLOBAL PLODR,SQUKIL,GETBUF,KILBUF,INPLOD,SQKIL,PVSTOR,TVSTOR,DSTOREM,SLEEPR
.GLOBAL OPSYS,SJFNS,MULTSG,PURBTB,SFIX,NSEGS
.GLOBAL C%11,C%22,C%33,C%44,C%55,C%66,C%0,C%1,C%2,C%3,C%M1,C%M2,C%M10
.GLOBAL C%M20,C%M30,C%M40,C%M60
.GLOBAL MAPJFN,DIRCHN
.INSRT MUDDLE >
SPCFXU==1
SYSQ
IFE ITS,[
IF1, .INSRT STENEX >
]
F==PVP
G==TVP
H==SP
RDTP==1000,,200000
FME==1000,,-1
IFN ITS,[
PGMSK==1777
PGSHFT==10.
]
IFE ITS,[
FLUSHP==0
PGMSK==777
PGSHFT==9.
]
LNTBYT==340700
ELN==4 ; LENGTH OF SLOT
FB.NAM==0 ; NAME SLOT IN TABLE
FB.PTR==1 ; Pointer to core pages
FB.AGE==2 ; age,,chain
FB.PGS==3 ; PTR AND LENGTH OF PAGE IN FILE
FB.AMK==37777777 ; extended address mask
FB.CNT==<-1>#<FB.AMK> ; page count mask
EOC==400000 ; END OF PURVEC CHAIN
IFE ITS,[
.FHSLF==400000 ; THIS FORK
%GJSHT==000001 ; SHORT FORM GTJFN
%GJOLD==100000
;PMAP BITS
PM%CNT==400000 ; PMAP WITH REPEAT COUNT
PM%RD==100000 ; PMAP WITH READ ACCESS
PM%EX==20000 ; PMAP WITH EXECUTE ACCESS (NO-OP ON 20X)
PM%CPY==400 ; PMAP WITH COPY-ON-WRITE ACCESS
PM%WR==40000 ; PMAP WITH WRITE ACCESS
;OPENF BITS
OF%RD==200000 ; OPEN IN READ MODE
OF%WR==100000 ; OPEN IN WRITE MODE
OF%EX==040000 ; OPEN IN EXECUTE MODE (TENEX CARES)
OF%THW==02000 ; OPEN IN THAWED MODE
OF%DUD==00020 ; DON'T UPDATE THAWED PAGES
]
; THIS ROUTINE TAKES A SLOT OFFSET IN REGISTER A AND MAPS IN THE ASSOCIATED
; FILE. IT CLOBBERS ALL ACs AND SKIP RETURNS IF IT WINS.
OFF==-5 ; OFFSET INTO PURVEC OF SLOT
NAM==-4 ; SIXBIT NAME OF THING BEING LOADED
LASTC==-3 ; LAST CHARACTER OF THE NAME
DIR==-2 ; SAVED POINTER TO DIRECTORY
SPAG==-1 ; FIRST PAGE IN FILE
PGNO==0 ; FIRST PAGE IN CORE
VER==-6 ; VERSION NUMBER OF MUDDLE TO USE IN OPENING FILES
FLEN==-7 ; LENGTH OF THE FILE
TEMP==-10 ; GENERAL TEMPORARY SLOT
WRT==-11 ; INDICATION IF OPEN IS FOR WRITING OR READING
CADDR==-12 ; ADDRESS OF CORE IMAGE LOCATION OF FILE
NSLOTS==13
; IT FIRST LOOKS TO SEE IF IT HAS THE PAGE NUMBER OF THE FILE
PLOAD: ADD P,[NSLOTS,,NSLOTS]
SKIPL P
JRST PDLOV
MOVEM A,OFF(P)
PUSH TP,C%0 ; [0]
PUSH TP,C%0 ; [0]
IFE ITS,[
SKIPN MAPJFN
PUSHJ P,OPSAV
]
PLOADX: PUSHJ P,SQKIL
MOVE A,OFF(P)
ADD A,PURVEC+1 ; GET TO SLOT
SKIPE B,FB.PGS(A) ; SKIP IF PAGE NUMBER
JRST GETIT
MOVE B,FB.NAM(A)
MOVEM B,NAM(P)
MOVE 0,B
MOVEI A,6 ; FIND LAST CHARACTER
TRNE 0,77 ; SKIP IF NOT DONE
JRST .+3
LSH 0,-6 ; BACK A CHAR
SOJG A,.-3 ; NOW CHAR IS BACKED OUT
ANDI 0,77 ; LASTCHR
MOVEM 0,LASTC(P)
; NOT TO TRY TO FIND FILE IN MAIN DATA BASE.
; THE GC'S WINDOW IS USED IN THIS CASE.
IFN ITS,[
.CALL MNBLK ; OPEN CHANNEL TO MAIN FILE
JRST NTHERE
PUSHJ P,TRAGN ; TRY OPENING UP CHANNEL AGAIN IF POSSIBLE
]
IFE ITS,[
SKIPN E,MAPJFN
JRST NTHERE ;who cares if no SAV.FILE?
MOVEM E,DIRCHN
]
MOVE D,NAM(P)
MOVE 0,LASTC(P)
PUSHJ P,GETDIR
MOVEM E,DIR(P)
PUSHJ P,GENVN ; GET VERSION # AS FIX
MOVE E,DIR(P)
MOVE D,NAM(P)
MOVE A,B
PUSHJ P,DIRSRC ; SEARCH DIRECTORY
JRST NTHERE ; GO TRY FIXING UP ITS NOT THERE
ANDI A,-1 ; WIN IN MULT SEG CASE
MOVE B,OFF(P) ; GET SLOT NUMBER
ADD B,PURVEC+1 ; POINT TO SLOT
HRRZ C,1(A) ; GET BLOCK NUMBER
HRRM C,FB.PGS(B) ; SMASH INTO SLOT
LDB C,[LNTBYT,,1(A)] ; SMASH IN LENGTH
HRLM C,FB.PGS(B) ; SMASH IN LENGTH
JRST PLOADX
; NOW TRY TO FIND FILE IN WORKING DIRECTORY
NTHERE: PUSHJ P,KILBUF
MOVE A,OFF(P) ; GET POINTER TO PURVEC SLOT
ADD A,PURVEC+1
PUSHJ P,GENVN ; GET VERSION NUMBER
HRRZM B,VER(P)
PUSHJ P,OPMFIL ; OPEN FILE
JRST FIXITU
; NUMBER OF PAGES ARE IN A
; STARTING PAGE NUMBER IN SPAG(P)
PLOD1: PUSHJ P,ALOPAG ; get the necessary pages
JRST MAPLS2
MOVE E,SPAG(P) ; E starting page in file
MOVEM B,PGNO(P)
IFN ITS,[
MOVN A,FLEN(P) ; get neg count
MOVSI A,(A) ; build aobjn pointer
HRR A,PGNO(P) ; get page to start
MOVE B,A ; save for later
HRRI 0,(E) ; page pointer for file
DOTCAL CORBLK,[[1000,,200000],[1000,,-1],A,[1000,,MAPCH],0]
.LOSE %LSSYS
.CLOSE MAPCH, ; no need to have file open anymore
]
IFE ITS,[
MOVEI A,(E) ; First page on rh of A
HRL A,DIRCHN ; JFN to lh of A
HRLI B,.FHSLF ; specify this fork
MOVSI C,PM%RD+PM%EX ; bits for read/execute
MOVE D,FLEN(P) ; # of pages to D
HRROI E,(B) ; build page aobjn for later
TLC E,-1(D) ; sexy way of doing lh
SKIPN OPSYS
JRST BLMAP ; if tops-20 can block PMAP
PMAP
ADDI A,1
ADDI B,1
SOJG D,.-3 ; map 'em all
MOVE B,E
JRST PLOAD1
BLMAP: HRRI C,(D)
TLO C,PM%CNT ; say it is counted
PMAP ; one PMAP does the trick
MOVE B,E
]
; now try to smash slot in PURVEC
PLOAD1: MOVE A,PURVEC+1 ; get pointer to it
ASH B,PGSHFT ; convert to aobjn pointer to words
MOVE C,OFF(P) ; get slot offset
ADDI C,(A) ; point to slot
MOVEM B,FB.PTR(C) ; clobber it in
TLZ B,(FB.CNT) ; isolate address of page
HRRZ D,PURVEC ; get offset into vector for start of chain
TRNE D,EOC ; skip if not end marker
JRST SCHAIN
HRLI D,400000+A ; set up indexed pointer
ADDI D,1
IFN ITS, HRRZ 0,@D ; get its address
IFE ITS,[
MOVE 0,@D
TLZ 0,(FB.CNT)
]
JUMPE 0,SCHAIN ; no chain exists, start one
CAMLE 0,B ; skip if new one should be first
AOJA D,INLOOP ; jump into the loop
SUBI D,1 ; undo ADDI
FCLOB: MOVE E,OFF(P) ; get offset for this guy
HRRM D,FB.AGE(C) ; link up
HRRM E,PURVEC ; store him away
JRST PLOADD
SCHAIN: MOVEI D,EOC ; get end of chain indicator
JRST FCLOB ; and clobber it in
INLOOP: MOVE E,D ; save in case of later link up
HRR D,@D ; point to next table entry
TRNE D,EOC ; 400000 is the end of chain bit
JRST SLFOUN ; found a slot, leave loop
ADDI D,1 ; point to address of progs
IFN ITS, HRRZ 0,@D ; get address of block
IFE ITS,[
MOVE 0,@D
TLZ 0,(FB.CNT)
]
CAMLE 0,B ; skip if still haven't fit it in
AOJA D,INLOOP ; back to loop start and point to chain link
SUBI D,1 ; point back to start of slot
SLFOUN: MOVE 0,OFF(P) ; get offset into vector of this guy
HRRM 0,@E ; make previous point to us
HRRM D,FB.AGE(C) ; link it in
PLOADD: AOS -NSLOTS(P) ; skip return
MOVE B,FB.PTR(C)
MAPLOS: SUB P,[NSLOTS,,NSLOTS] ; flush stack crap
SUB TP,C%22
POPJ P,
MAPLS0: ERRUUO EQUOTE NO-SAV-FILE
JRST MAPLOS
MAPLS1: ERRUUO EQUOTE NO-FIXUP-FILE
JRST MAPLOS
MAPLS2: ERRUUO EQUOTE NO-ROOM-AVAILABLE
JRST MAPLOS
FIXITU:
;OPEN FIXUP FILE ON MUDSAV
IFN ITS,[
.CALL FIXBLK ; OPEN UP FIXUP FILE
PUSHJ P,TRAGN ; SEE IF TOTALLY LOSING
]
IFE ITS,[
MOVSI A,%GJSHT ; GTJFN BITS
HRROI B,FXSTR
SKIPE OPSYS
HRROI B,TFXSTR
GTJFN
FATAL FIXUP FILE NOT FOUND
MOVEM A,DIRCHN
MOVE B,[440000,,OF%RD+OF%EX]
OPENF
FATAL FIXUP FILE CANT BE OPENED
]
MOVE 0,LASTC(P) ; GET DIRECTORY
PUSHJ P,GETDIR
MOVE D,NAM(P)
PUSHJ P,DIRSR1 ; SEARCH DIRECTORY FOR FIXUP
JRST NOFXUP ; NO FIXUP IN MAIN DIRECTORY
ANDI A,-1 ; WIN IN MULTI SEGS
HRRZ A,1(A) ; GET BLOCK NUMBER OF START
ASH A,8. ; CONVERT TO WORDS
IFN ITS,[
.ACCES MAPCH,A ; ACCESS FILE
]
IFE ITS,[
MOVEI B,(A)
MOVE A,DIRCHN
SFPTR
JFCL
]
PUSHJ P,KILBUF
FIXT1: PUSHJ P,RFXUP ; READ IN THE FIXUP FILE
IFN ITS,[
.CALL MNBLK ; REOPEN SAV FILE
PUSHJ P,TRAGN
]
IFE ITS,[
MOVE A,MAPJFN ; SET UP DIRCHAN AGAIN
MOVEM A,DIRCHN
]
; NOW TRY TO LOCATE SAV FILE
MOVE 0,LASTC(P) ; GET LASTCHR
PUSHJ P,GETDIR ; GET DIRECTORY
HRRZ A,VER(P) ; GET VERSION #
MOVE D,NAM(P) ; GET NAME OF FILE
PUSHJ P,DIRSRC ; SEARCH DIRECTORY
JRST MAPLS1 ; NO SAV FILE THERE
ANDI A,-1
HRRZ E,1(A) ; GET STARTING BLOCK #
LDB A,[LNTBYT,,1(A)] ; GET LENGTH INTO A
MOVEM A,FLEN(P) ; SAVE LENGTH
MOVEM E,SPAG(P) ; SAVE STARTING BLOCK NUMBER
PUSHJ P,KILBUF
PUSHJ P,RSAV ; READ IN CODE
; now to do fixups
FXUPGO: MOVE A,(TP) ; pointer to them
SETOM INPLOD ; ABSOLUTE CLUDGE TO PREVENT BUFFER FROM
; SCREWING US
IFE ITS,[
SKIPN MULTSG
JRST FIXMLT
]
HRRZ D,B ; this codes gets us running in the correct
; segment
ASH D,PGSHFT
HRRI D,FIXMLT
MOVEI C,0
XJRST C ; good bye cruel segment (will work if we fell
; into segment 0)
FIXMLT: ASH B,PGSHFT ; aobjn to program
FIX1: SKIPL E,(A) ; read one hopefully squoze
FATAL ATTEMPT TO TYPE FIX PURE
TLZ E,740000
NOPV1: PUSHJ P,SQUTOA ; look it up
FATAL BAD FIXUPS
; N.B. THE VALUE IN THE FIXUPS FOR AN ADDRESS CAN BE NEGATIVE. IF THIS HAPPENS
; IT MEANS THAT THE LEFT HALF CONTAINS THE VALUE INSTEAD OF THE RIGHT HALF
NOPV2: AOBJP A,FIX2
HLRZ D,(A) ; get old value
HRRZS E
SUBM E,D ; D is diff between old and new
HRLM E,(A) ; fixup the fixups
NOPV3: MOVEI 0,0 ; flag for which half
FIX4: JUMPE 0,FIXRH ; jump if getting rh
MOVEI 0,0 ; next time will get rh
AOBJP A,FIX2 ; done?
HLRE C,(A) ; get lh
JUMPE C,FIX3 ; 0 terminates
FIX5: SKIPGE C ; If C is negative then left half garbage
JRST FIX6
ADDI C,(B) ; access the code
NOPV4: ADDM D,-1(C) ; and fix it up
JRST FIX4
; FOR LEFT HALF CASE
FIX6: MOVNS C ; GET TO ADRESS
ADDI C,(B) ; ACCESS TO CODE
HLRZ E,-1(C) ; GET OUT WORD
ADDM D,E ; FIX IT UP
HRLM E,-1(C)
JRST FIX4
FIXRH: MOVEI 0,1 ; change flag
HRRE C,(A) ; get it and
JUMPN C,FIX5
FIX3: AOBJN A,FIX1 ; do next one
IFN SPCFXU,[
MOVE C,B
PUSHJ P,SFIX
]
PUSHJ P,SQUKIL ; KILL SQUOZE TABLE
SETZM INPLOD
FIX2:
HRRZS VER(P) ; INDICATE SAV FILE
MOVEM B,CADDR(P)
PUSHJ P,GENVN
HRRM B,VER(P)
PUSHJ P,OPWFIL
FATAL MAP FIXUP LOSSAGE
IFN ITS,[
MOVE B,CADDR(P)
.IOT MAPCH,B ; write out the goodie
.CLOSE MAPCH,
PUSHJ P,OPMFIL
FATAL WHERE DID THE FILE GO?
MOVE E,CADDR(P)
ASH E,-PGSHFT ; to page AOBJN
DOTCAL CORBLK,[[1000,,200000],[1000,,-1],E,[1000,,MAPCH],0]
.LOSE %LSSYS
.CLOSE MAPCH,
]
IFE ITS,[
MOVE A,DIRCHN ; GET JFN
MOVE B,CADDR(P) ; ready to write it out
HRLI B,444400
HLRE C,CADDR(P)
SOUT ; zap it out
TLO A,400000 ; dont recycle the JFN
CLOSF
JFCL
ANDI A,-1 ; kill sign bit
MOVE B,[440000,,240000]
OPENF
FATAL MAP FIXUP LOSSAGE
MOVE B,CADDR(P)
ASH B,-PGSHFT ; aobjn to pages
HLRE D,B ; -count
HRLI B,.FHSLF
MOVSI A,(A)
MOVSI C,PM%RD+PM%EX
PMAP
ADDI A,1
ADDI B,1
AOJN D,.-3
]
SKIPGE MUDSTR+2
JRST EFIX2 ; exp vers, dont write out
IFE ITS,[
HRRZ A,SJFNS ; get last jfn from savxxx file
JUMPE A,.+4 ; oop
CAME A,MAPJFN
CLOSF ; close it
JFCL
HLLZS SJFNS ; zero the slot
]
MOVEI 0,1 ; INDICATE FIXUP
HRLM 0,VER(P)
PUSHJ P,OPWFIL
FATAL CANT WRITE FIXUPS
IFN ITS,[
MOVE E,(TP)
HLRE A,E ; get length
MOVNS A
ADDI A,2 ; account for these 2 words
MOVE 0,[-2,,A] ; write version and length
.IOT MAPCH,0
.IOT MAPCH,E ; out go the fixups
SETZB 0,A
MOVEI B,MAPCH
.CLOSE MAPCH,
]
IFE ITS,[
MOVE A,DIRCHN
HLRE B,(TP) ; length of fixup vector
MOVNS B
ADDI B,2 ; for length and version words
BOUT
PUSHJ P,GENVN
BOUT
MOVSI B,444400 ; byte pointer to fixups
HRR B,(TP)
HLRE C,(TP)
SOUT
CLOSF
JFCL
]
EFIX2: MOVE B,CADDR(P)
ASH B,-PGSHFT
JRST PLOAD1
; Here to try to get a free page block for new thing
; A/ # of pages to get
ALOPAG: MOVE C,GCSTOP ; FOOL GETPAG
ADDI C,3777
ASH C,-PGSHFT
MOVE B,PURBOT
IFE ITS,[
SKIPN MULTSG ; skip if multi-segments
JRST ALOPA1
; Compute the "highest" PURBOT (i.e. find the least busy segment)
PUSH P,E
PUSH P,A
MOVN A,NSEGS ; aobjn pntr to table
HRLZS A
MOVEI B,0
ALOPA3: CAML B,PURBTB(A) ; if this one is larger
JRST ALOPA2
MOVE B,PURBTB(A) ; use it
MOVEI E,FSEG(A) ; and the segment #
ALOPA2: AOBJN A,ALOPA3
POP P,A
]
ALOPA1: ASH B,-PGSHFT
SUBM B,C ; SEE IF ROOM
CAIL C,(A)
JRST ALOPGW
PUSHJ P,GETPAX ; try to get enough pages
IFE ITS, JRST EPOPJ
IFN ITS, POPJ P,
ALOPGW:
IFN ITS, AOS (P) ; won skip return
IFE ITS,[
SKIPE MULTSG
AOS -1(P) ; ret addr
SKIPN MULTSG
AOS (P)
]
MOVE 0,PURBOT
IFE ITS,[
SKIPE MULTSG
MOVE 0,PURBTB-FSEG(E)
]
ASH 0,-PGSHFT
SUBI 0,(A)
MOVE B,0
IFE ITS,[
SKIPN MULTSG
JRST ALOPW1
ASH 0,PGSHFT
HRRZM 0,PURBTB-FSEG(E)
ASH E,PGSHFT ; INTO POSITION
IORI B,(E) ; include segment in address
POP P,E
JRST ALOPW2
]
ALOPW1: ASH 0,PGSHFT
ALOPW2: CAMGE 0,PURBOT
MOVEM 0,PURBOT
CAML 0,P.TOP
POPJ P,
IFE ITS,[
SUBI 0,1777
ANDCMI 0,1777
]
MOVEM 0,P.TOP
POPJ P,
EPOPJ:
IFE ITS,[
SKIPE MULTSG
POP P,E
]
POPJ P,
IFE ITS,[
GETPAX: TDZA B,B ; here if other segs ok
GETPAG: MOVEI B,1 ; here for only main segment
JRST @[.+1] ; run in sect 0
MOVNI E,1
]
IFN ITS,[
GETPAX:
GETPAG:
]
MOVE C,P.TOP ; top of GC space
ASH C,-PGSHFT ; to page number
IFE ITS,[
SKIPN MULTSG
JRST GETPA9
JUMPN B,GETPA9 ; if really wan all segments,
; must force all to be free
PUSH P,A
MOVN A,NSEGS ; aobjn pntr to table
HRLZS A
MOVE B,P.TOP
GETPA8: CAMLE B,PURBTB(A) ; if this one is larger (or the same)
JRST GETPA7
MOVE B,PURBTB(A) ; use it
MOVEI E,FSEG(A) ; and the segment #
GETPA7: AOBJN A,GETPA8
POP P,A
JRST .+2
]
GETPA9: MOVE B,PURBOT
ASH B,-PGSHFT ; also to pages
SUBM B,C ; pages available ==> C
CAMGE C,A ; skip if have enough already
JRST GETPG1 ; no, try to shuffle around
SUBI B,(A) ; B/ first new page
CPOPJ1: AOS (P)
IFN ITS, POPJ P,
IFE ITS,[
SPOPJ: SKIPN MULTSG
POPJ P, ; return with new free page in B
; (and seg# in E?)
POP P,21
SETZM 20
XJRST 20
]
; Here if shuffle must occur or gc must be done to make room
GETPG1: MOVEI 0,0
SKIPE NOSHUF ; if can't shuffle, then ask gc
JRST ASKAGC
MOVE 0,PURTOP ; get top of mapped pure area
SUB 0,P.TOP
ASH 0,-PGSHFT ; to pages
CAMGE 0,A ; skip if winnage possible
JRST ASKAGC ; please AGC give me some room!!
SUBM A,C ; C/ amount we must flush to make room
IFE ITS,[
SKIPE MULTSG ; if multi and getting in all segs
JUMPL E,LPGL1 ; check out each and every segment
PUSHJ P,GL1
SKIPE MULTSG
PUSHJ P,PURTBU ; update PURBOT in multi case
JRST GETPAX
LPGL1: PUSH P,A
PUSH P,[FSEG-1]
LPGL2: AOS E,(P) ; count segments
MOVE B,NSEGS
ADDI B,FSEG
CAML E,B
JRST LPGL3
PUSH P,C
MOVE C,PURBOT ; fudge so look for appropriate amt
SUB C,PURBTB-FSEG(E)
ASH C,-PGSHFT ; to pages
ADD C,(P)
SKIPLE C ; none to flush
PUSHJ P,GL1
HRRZ E,-1(P) ; fet section again
HRRZ B,PURBOT
HRRZ C,PURBTB-FSEG(E) ; lets share with 0 again
SUB C,B
HRL B,E ; get segment
MOVEI A,(B)
ASH B,-PGSHFT
ASH A,-PGSHFT
HRLI A,.FHSLF
HRLI B,.FHSLF
ASH C,-PGSHFT
HRLI C,PM%CNT+PM%RD+PM%WR+PM%EX
PMAP
LPGL4: POP P,C
JRST LPGL2
LPGL3: SUB P,C%11
POP P,A
SKIPE MULTSG
PUSHJ P,PURTBU ; update PURBOT in multi case
JRST GETPAG
]
; Here to find pages for flush using LRU algorithm (in multi seg mode, only
; care about the segment in E)
GL1: MOVE B,PURVEC+1 ; get pointer to pure sr vector
MOVEI 0,-1 ; get very large age
GL2: SKIPL FB.PTR(B) ; skip if not already flushed
JRST GL3
IFE ITS,[
SKIPN MULTSG
JRST GLX
LDB D,[220500,,FB.PTR(B)] ; get segment #
CAIE D,(E)
JRST GL3 ; wrong swegment, ignore
]
GLX: HLRZ D,FB.AGE(B) ; get this ones age
CAMLE D,0 ; skip if this is a candidate
JRST GL3
MOVE F,B ; point to table entry with E
MOVEI 0,(D) ; and use as current best
GL3: ADD B,[ELN,,ELN] ; look at next
JUMPL B,GL2
HLRE B,FB.PTR(F) ; get length of flushee
ASH B,-PGSHFT ; to negative # of pages
ADD C,B ; update amount needed
IFN ITS,SETZM FB.PTR(F) ; indicate it will be gone
IFE ITS,MOVNS FB.PTR(F) ; save page info for flushing pages
JUMPG C,GL1 ; jump if more to get
; Now compact pure space
PUSH P,A ; need all acs
HRRZ D,PURVEC ; point to first in core addr order
HRRZ C,PURTOP
IFE ITS,[
SKIPE MULTSG
HRLI C,(E) ; adjust for segment
]
ASH C,-PGSHFT ; to page number
SETZB F,A
CL1: ADD D,PURVEC+1 ; to real pointer
SKIPGE FB.PTR(D) ; skip if this one is a flushee
JRST CL2 ; this one stays
IFE ITS,[
PUSH P,C
PUSH P,D
HRRZ C,FB.PGS(D) ; is this from SAV FILE?
JUMPN C,CLFOUT ; yes. don't bother flushing pages
MOVN C,FB.PTR(D) ; get aobjn pointer to code in C
SETZM FB.PTR(D) ; and flush this because it works (sorry)
ASH C,-PGSHFT ; pages speak louder than words
HLRE D,C ; # of pages saved here for unmap
HRLI C,.FHSLF ; C now contains myfork,,lowpage
MOVE A,C ; put that in A for RMAP
RMAP ; A now contains JFN in left half
MOVE B,C ; ac roulette: get fork,,page into B for PMAP
HLRZ C,A ; hold JFN in C for future CLOSF
MOVNI A,1 ; say this page to be unmapped
CLFLP: PMAP ; do the unmapping
ADDI B,1 ; next page
AOJL D,CLFLP ; continue for all pages
MOVE A,C ; restore JFN
CLOSF ; and close it, throwing away the JFN
JFCL ; should work in 95/100 cases
CLFOU1: POP P,D ; fatal error if can't close
POP P,C
]
HRRZ D,FB.AGE(D) ; point to next one in chain
JUMPN F,CL3 ; jump if not first one
HRRM D,PURVEC ; and use its next as first
JRST CL4
IFE ITS,[
CLFOUT: SETZM FB.PTR(D) ; zero the code pointer
JRST CLFOU1
]
CL3: HRRM D,FB.AGE(F) ; link up
JRST CL4
; Found a stayer, move it if necessary
CL2:
IFE ITS,[
SKIPN MULTSG
JRST CL9
LDB F,[220500,,FB.PTR(D)] ; check segment
CAIE E,(F)
JRST CL6X ; no other segs move at all
]
CL9: MOVEI F,(D) ; another pointer to slot
HLRE B,FB.PTR(D) ; - length of block
IFE ITS,[
TRZ B,<-1>#<(FB.CNT)>
MOVE D,FB.PTR(D) ; pointer to block
TLZ D,(FB.CNT) ; kill count bits
]
IFN ITS, HRRZ D,FB.PTR(D)
SUB D,B ; point to top of block
ASH D,-PGSHFT ; to page number
CAMN D,C ; if not moving, jump
JRST CL6
ASH B,-PGSHFT ; to pages
IFN ITS,[
CL5: SUBI C,1 ; move to pointer and from pointer
SUBI D,1
DOTCAL CORBLK,[[1000,,200000],[1000,,-1],C,[1000,,-1],D]
.LOSE %LSSYS
AOJL B,CL5 ; count down
]
IFE ITS,[
PUSH P,B ; save # of pages
MOVEI A,-1(D) ; copy from pointer
HRLI A,.FHSLF ; get this fork code
RMAP ; get a JFN (hopefully)
EXCH D,(P) ; D # of pages (save from)
ADDM D,(P) ; update from
MOVEI B,-1(C) ; to pointer in B
HRLI B,.FHSLF
MOVSI C,PM%RD+PM%EX ; read/execute modes
SKIPN OPSYS
JRST CCL1
PMAP ; move a page
SUBI A,1
SUBI B,1
AOJL D,.-3 ; move them all
AOJA B,CCL2
CCL1: TLO C,PM%CNT
MOVNS D
SUBI B,-1(D)
SUBI A,-1(D)
HRRI C,(D)
PMAP
CCL2: MOVEI C,(B)
POP P,D
]
; Update the table address for this loser
SUBM C,D ; compute offset (in pages)
ASH D,PGSHFT ; to words
ADDM D,FB.PTR(F) ; update it
CL7: HRRZ D,FB.AGE(F) ; chain on
CL4: TRNN D,EOC ; skip if end of chain
JRST CL1
ASH C,PGSHFT ; to words
IFN ITS, MOVEM C,PURBOT ; reset pur bottom
IFE ITS,[
SKIPN MULTSG
JRST CLXX
HRRZM C,PURBTB-FSEG(E)
CAIA
CLXX: MOVEM C,PURBOT ; reset pur bottom
]
POP P,A
POPJ P,
IFE ITS,[
CL6X: MOVEI F,(D) ; chain on
JRST CL7
]
CL6:
IFN ITS, HRRZ C,FB.PTR(F) ; get new top of world
IFE ITS,[
MOVE C,FB.PTR(F)
TLZ C,(FB.CNT)
]
ASH C,-PGSHFT ; to page #
JRST CL7
IFE ITS,[
PURTBU: PUSH P,A
PUSH P,B
MOVN B,NSEGS
HRLZS B
MOVE A,PURTOP
PURTB2: CAMGE A,PURBTB(B)
JRST PURTB1
MOVE A,PURBTB(B)
MOVEM A,PURBOT
PURTB1: AOBJN B,PURTB2
POP P,B
POP P,A
POPJ P,
]
; SUBR to create an entry in the vector for one of these guys
MFUNCTION PCODE,SUBR
ENTRY 2
GETYP 0,(AB) ; check 1st arg is string
CAIE 0,TCHSTR
JRST WTYP1
GETYP 0,2(AB) ; second must be fix
CAIE 0,TFIX
JRST WTYP2
MOVE A,(AB) ; convert name of program to sixbit
MOVE B,1(AB)
PUSHJ P,STRTO6
PCODE4: MOVE C,(P) ; get name in sixbit
; Now look for either this one or an empty slot
MOVEI E,0
MOVE B,PURVEC+1
PCODE2: CAMN C,FB.NAM(B) ; skip if this is not it
JRST PCODE1 ; found it, drop out of loop
JUMPN E,.+3 ; dont record another empty if have one
SKIPN FB.NAM(B) ; skip if slot filled
MOVE E,B ; remember pointer
ADD B,[ELN,,ELN]
JUMPL B,PCODE2 ; jump if more to look at
JUMPE E,PCODE3 ; if E=0, error no room
MOVEM C,FB.NAM(E) ; else stash away name and zero rest
SETZM FB.PTR(E)
SETZM FB.AGE(E)
CAIA
PCODE1: MOVE E,B ; build <slot #>,,<offset>
MOVEI 0,0 ; flag whether new slot
SKIPE FB.PTR(E) ; skip if mapped already
MOVEI 0,1
MOVE B,3(AB)
HLRE D,E
HLRE E,PURVEC+1
SUB D,E
HRLI B,(D)
MOVSI A,TPCODE
SKIPN NOSHUF ; skip if not shuffling
JRST FINIS
JUMPN 0,FINIS ; jump if winner
PUSH TP,A
PUSH TP,B
HLRZ A,B
PUSHJ P,PLOAD
JRST PCOERR
POP TP,B
POP TP,A
JRST FINIS
PCOERR: ERRUUO EQUOTE PURE-LOAD-FAILURE
PCODE3: HLRE A,PURVEC+1 ; get current length
MOVNS A
ADDI A,10*ELN ; add 10(8) more entry slots
PUSHJ P,IBLOCK
EXCH B,PURVEC+1 ; store new one and get old
HLRE A,B ; -old length to A
MOVSI B,(B) ; start making BLT pointer
HRR B,PURVEC+1
SUBM B,A ; final dest to A
IFE ITS, HRLI A,-1 ; force local index
BLT B,-1(A)
JRST PCODE4
; Here if must try to GC for some more core
ASKAGC: SKIPE GCFLG ; if already in GC, lose
IFN ITS, POPJ P,
IFE ITS, JRST SPOPJ
MOVEM A,0 ; amount required to 0
ASH 0,PGSHFT ; TO WORDS
MOVEM 0,GCDOWN ; pass as funny arg to AGC
EXCH A,C ; save A from gc's destruction
IFN ITS,.IOPUSH MAPCH, ; gc uses same channel
PUSH P,C
SETOM PLODR
MOVE C,[8,,9.] ; SET UP INDICATORS FOR GC
PUSHJ P,AGC
SETZM PLODR
POP P,C
IFN ITS,.IOPOP MAPCH,
EXCH C,A
IFE ITS,[
JUMPL C,.+3
JUMPL E,GETPAG
JRST GETPAX
]
IFN ITS, JUMPGE C,GETPAG
ERRUUO EQUOTE NO-MORE-PAGES
; Here to clean up pure space by flushing all shared stuff
PURCLN: SKIPE NOSHUF
POPJ P,
MOVEI B,EOC
HRRM B,PURVEC ; flush chain pointer
MOVE D,PURVEC+1 ; get pointer to table
CLN1:
IFE ITS,[
SKIPN A,FB.PTR(D)
JRST NOCL
ASH A,-PGSHFT
HRLI A,.FHSLF
RMAP
HLRZS A
CLOSF
JFCL
]
NOCL: SETZM FB.PTR(D) ; zero pointer entry
SETZM FB.AGE(D) ; zero link and age slots
SETZM FB.PGS(D)
ADD D,[ELN,,ELN] ; go to next slot
JUMPL D,CLN1 ; do til exhausted
MOVE B,PURBOT ; now return pages
SUB B,PURTOP ; compute page AOBJN pointer
IFE ITS, SETZM MAPJFN ; make sure zero mapjfn
JUMPE B,CPOPJ ; no pure pages?
MOVSI B,(B)
HRR B,PURBOT
ASH B,-PGSHFT
IFN ITS,[
DOTCAL CORBLK,[[1000,,0],[1000,,-1],B]
.LOSE %LSSYS
]
IFE ITS,[
SKIPE MULTSG
JRST CLN2
HLRE D,B ; - # of pges to flush
HRLI B,.FHSLF ; specify hacking hom fork
MOVNI A,1
MOVEI C,0
PMAP
ADDI B,1
AOJL D,.-2
]
MOVE B,PURTOP ; now fix up pointers
MOVEM B,PURBOT ; to indicate no pure
CPOPJ: POPJ P,
IFE ITS,[
CLN2: HLRE C,B ; compute pos no. pages
HRLI B,.FHSLF
MOVNS C
MOVNI A,1 ; flushing pages
HRLI C,PM%CNT
MOVE D,NSEGS
MOVE E,PURTOP ; for munging table
ADDI B,<FSEG>_9. ; do it to the correct segment
PMAP
ADDI B,1_9. ; cycle through segments
HRRZM E,PURBTB(D) ; mung table
SOJG D,.-3
MOVEM E,PURBOT
POPJ P,
]
; Here to move the entire pure space.
; A/ # and direction of pages to move (+ ==> up)
MOVPUR: SKIPE NOSHUF
FATAL CANT MOVE PURE SPACE AROUND
IFE ITS,ASH A,1
SKIPN B,A ; zero movement, ignore call
POPJ P,
ASH B,PGSHFT ; convert to words for pointer update
MOVE C,PURVEC+1 ; loop through updating non-zero entries
SKIPE 1(C)
ADDM B,1(C)
ADD C,[ELN,,ELN]
JUMPL C,.-3
MOVE C,PURTOP ; found pages at top and bottom of pure
ASH C,-PGSHFT
MOVE D,PURBOT
ASH D,-PGSHFT
ADDM B,PURTOP ; update to new boundaries
ADDM B,PURBOT
IFE ITS,[
SKIPN MULTSG ; in multi-seg mode, must mung whole table
JRST MOVPU1
MOVN E,NSEGS
HRLZS E
ADDM PURBTB(E)
AOBJN E,.-1
]
MOVPU1: CAIN C,(D) ; differ?
POPJ P,
JUMPG A,PUP ; if moving up, go do separate CORBLKs
IFN ITS,[
SUBM D,C ; -size of area to C (in pages)
MOVEI E,(D) ; build pointer to bottom of destination
ADD E,A
HRLI E,(C)
HRLI D,(C)
DOTCAL CORBLK,[[1000,,200000],[1000,,-1],E,[1000,,-1],D]
.LOSE %LSSYS
POPJ P,
PUP: SUBM C,D ; pages to move to D
ADDI A,(C) ; point to new top
PUPL: SUBI C,1
SUBI A,1
DOTCAL CORBLK,[[1000,,200000],[1000,,-1],A,[1000,,-1],C]
.LOSE %LSSYS
SOJG D,PUPL
POPJ P,
]
IFE ITS,[
SUBM D,C ; pages to move to D
MOVSI E,(C) ; build aobjn pointer
HRRI E,(D) ; point to lowest
ADD D,A ; D==> new lowest page
MOVEI F,0 ; seg info
SKIPN MULTSG
JRST XPLS3
MOVEI F,FSEG-1
ADD F,NSEGS
ASH F,9.
XPLS3: MOVE G,E
MOVE H,D ; save for outer loop
PURCL1: MOVSI A,.FHSLF ; specify here
HRRI A,(E) ; get a page
IORI A,(F) ; hack seg i
RMAP ; get a real handle on it
MOVE B,D ; where to go
HRLI B,.FHSLF
MOVSI C,PM%RD+PM%EX
IORI A,(F)
PMAP
ADDI D,1
AOBJN E,PURCL1
SKIPN MULTSG
POPJ P,
SUBI F,1_9.
CAIGE F,FSEG_9.
POPJ P,
MOVE E,G
MOVE D,H
JRST PURCL1
PUP: SUB D,C ; - count to D
MOVSI E,(D) ; start building AOBJN
HRRI E,(C) ; aobjn to top
ADD C,A ; C==> new top
MOVE D,C
MOVEI F,0 ; seg info
SKIPN MULTSG
JRST XPLS31
MOVEI F,FSEG
ADD F,NSEGS
ASH F,9.
XPLS31: MOVE G,E
MOVE H,D ; save for outer loop
PUPL: MOVSI A,.FHSLF
HRRI A,(E)
IORI A,(F) ; segment
RMAP ; get real handle
MOVE B,D
HRLI B,.FHSLF
IORI B,(F)
MOVSI C,PM%RD+PM%EX
PMAP
SUBI E,2
SUBI D,1
AOBJN E,PUPL
SKIPN MULTSG
POPJ P,
SUBI F,1_9.
CAIGE F,FSEG_9.
POPJ P,
MOVE E,G
MOVE D,H
JRST PUPL
POPJ P,
]
IFN ITS,[
.GLOBAL CSIXBT
CSIXBT: MOVEI 0,5
PUSH P,[440700,,C]
PUSH P,[440600,,D]
MOVEI D,0
CSXB2: ILDB E,-1(P)
CAIN E,177
JRST CSXB1
SUBI E,40
IDPB E,(P)
SOJG 0,CSXB2
CSXB1: SUB P,C%22
MOVE C,D
POPJ P,
]
GENVN: MOVE C,[440700,,MUDSTR+2]
MOVEI D,5
MOVEI B,0
VNGEN: ILDB 0,C
CAIN 0,177
POPJ P,
IMULI B,10.
SUBI 0,60
ADD B,0
SOJG D,VNGEN
POPJ P,
IFE ITS,[
MSKS: 774000,,0
777760,,0
777777,,700000
777777,,777400
777777,,777776
]
; THESE ARE DIRECTORY SEARCH ROUTINES
; THIS ROUTINE DOES A BINARY SEARCH ON A DIRECTORY AND RETURNS A POINTER
; RESTED DOWN TO THE APPROPRIATE SLOT IN THE DIRECTORY.
; ARGS: E==DIR POINTER D==FILE-NAME 1 A==VERSION #
; RETS: A==RESTED DOWN DIRECTORY
DIRSR1: TLOA 0,400000 ; INDICATION OF ONE ARGUMENT SEARCH
DIRSRC: TLZ 0,400000 ; INDICATOR OF 2 ARGUMENT SEARCH
PUSH P,A ; SAVE VERSION #
HLRE B,E ; GET LENGTH INTO B
MOVNS B
MOVE A,E
HRLS B ; GET BOTH SIDES
UP: ASH B,-1 ; HALVE TABLE
AND B,[-2,,-2] ; FORCE DIVIS BY 2
MOVE C,A ; COPY POINTER
JUMPLE B,LSTHLV ; CANT GET SMALLER
ADD C,B
IFE ITS, HRRZ F,C ; avoid lossage in multi-sections
IFN ITS, CAMLE D,(C) ; SKIP IF EITHER FOUND OR IN TOP
IFE ITS, CAMLE D,(F) ; SKIP IF EITHER FOUND OR IN TOP
MOVE A,C ; POINT TO SECOND HALF
IFN ITS, CAMN D,(C) ; SKIP IF NOT FOUND
IFE ITS, CAMN D,(F) ; SKIP IF NOT FOUND
JRST WON
IFN ITS, CAML D,(C) ; SKIP IF IN TOP HALF
IFE ITS, CAML D,(F) ; SKIP IF IN TOP HALF
JRST UP
HLLZS C ; FIX UP POINTER
SUB A,C
JRST UP
WON: JUMPL 0,SUPWIN
MOVEI 0,0 ; DOWN FLAG
WON1: LDB A,[221200,,1(C)] ; GET VERSION NUMBER
CAMN A,(P) ; SKIP IF NOT EQUAL
JRST SUPWIN
CAMG A,(P) ; SKIP IF LT
JRST SUBIT
SETO 0,
SUB C,C%22 ; GET NEW C
JRST SUBIT1
SUBIT: ADD C,C%22 ; SUBTRACT
JUMPN 0,C1POPJ
SUBIT1:
IFN ITS, CAMN D,(C) ; SEE WHETHER WERE STILL WINNING
IFE ITS,[
HRRZ F,C
CAMN D,(F)
]
JRST WON1
C1POPJ: SUB P,C%11 ; GET RID OF VERSION #
POPJ P, ; LOSE LOSE LOSE
SUPWIN: MOVE A,C ; RETURN ARGUMENT IN A
AOS -1(P) ; SKIP RETURN INDICATES IT WAS FOUND
JRST C1POPJ
LSTHLV:
IFN ITS, CAMN D,(C) ; LINEAR SEARCH REST
IFE ITS,[
HRRZ F,C
CAMN D,(F) ; LINEAR SEARCH REST
]
JRST WON
ADD C,C%22
JUMPL C,LSTHLV
JRST C1POPJ
; ROUTINE TO GET A DIRECTORY. ASSUMES MAPCH IS OPEN TO FIXUP OR SAV FILE AND 0 IS THE
; LAST CHAR TO BE HASHED. RETURNS POINTER TO DIRECTORY IN E
IFN ITS,[
GETDIR: PUSH P,C
PUSH P,0
PUSHJ P,SQKIL
MOVEI A,1 ; GET A BUFFER
PUSHJ P,GETBUF
MOVEI C,(B)
ASH C,-10.
DOTCAL CORBLK,[[RDTP],[FME],C,[1000,,MAPCH],[1000,,0]]
PUSHJ P,SLEEPR
POP P,0
IDIV 0,(B) ; A NOW CONTAINS THE DIRECTORY NUMBER
ADDI A,1(B)
DOTCAL CORBLK,[[RDTP],[FME],C,[1000,,MAPCH],(A)]
PUSHJ P,SLEEPR
MOVN E,(B) ; GET -LENGTH OF DIRECTORY
HRLZS E ; BUILD AOBJN PTR TO DIR
HRRI E,1(B)
POP P,C
POPJ P,
]
; IN WONDERFUL TOPS20 VERSION DIRCHN CONTAINS THE JFN
IFE ITS,[
GETDIR: JRST @[.+1]
PUSH P,C
PUSH P,0
PUSHJ P,SQKIL
MOVEI A,1 ; GET A BUFFER
PUSHJ P,GETBUF
HRROI E,(B)
ASH B,-9.
HRLI B,.FHSLF ; SET UP DESTINATION (CORE)
MOVS A,DIRCHN ; SET UP SOURCE (FILE)
MOVSI C,PM%RD+PM%EX ; READ+EXEC ACCESS
PMAP
POP P,0
IDIV 0,(E) ; A NOW CONTAINS THE DIRECTORY NUMBER
ADDI A,1(E) ; POINT TO THE DIRECTORY ENTRY
MOVE A,(A) ; GET THE PAGE NUMBER
HRL A,DIRCHN ; SET UP SOURCE (FILE)
PMAP ; AGAIN READ IN DIRECTORY
MOVEI A,(E)
MOVN E,(E) ; GET -LENGTH OF DIRECTORY
HRLZS E ; BUILD AOBJN PTR TO DIR
HRRI E,1(A)
POP P,C
SKIPN MULTSG
POPJ P,
POP P,21
SETZM 20
XJRST 20
]
; HERE IF CAN'T FIND FIXUP FILE IN MAIN DIRECTORY
NOFXUP:
IFE ITS,[
MOVE A,DIRCHN ; JFN FOR FIXUP FILE
CLOSF ; CLOSE IT
JFCL
]
MOVE A,FXTBL ; GET AOBJN POINTER TO FIXUP TABLE
NOFXU1: HRRZ B,(A) ; GET VERSION TO TRY
HRRM B,VER(P) ; STUFF IN VERSION
MOVEI B,1 ; DUMP IN FIXUP INDICATOR
HRLM B,VER(P)
MOVEM A,TEMP(P) ; SAVE POINTER TO FXTBL
PUSHJ P,OPXFIL ; LOOK FOR FIXUP FILE
JRST NOFXU2
PUSHJ P,RFXUP ; READ IN THE FIXUP FILE
HRRZS VER(P) ; INDICATE SAV FILE
PUSHJ P,OPXFIL ; TRY OPENING IT
JRST MAPLS0 ; GIVE UP NO SAV FILE TO BE HAD
PUSHJ P,RSAV
JRST FXUPGO ; GO FIXUP THE WORLD
NOFXU2: MOVE A,TEMP(P) ; GET BACK POINTER
AOBJN A,NOFXU1 ; TRY NEXT
JRST MAPLS1 ; NO FILE TO BE HAD
GETIT: HRRZM B,SPAG(P) ; GET BLOCK OF START
HLRZM B,FLEN(P) ; DAMMIT SAVE THIS!
HLRZ A,B ; GET LENGTH
IFN ITS,[
.CALL MNBLK
PUSHJ P,TRAGN
]
IFE ITS,[
MOVE E,MAPJFN
MOVEM E,DIRCHN
]
JRST PLOD1
; ROUTINE TO SEE IF FILE IS NOT OPEN BECAUSE OF FNF AND FATAL IF SO
IFN ITS,[
TRAGN: PUSH P,0 ; SAVE 0
.STATUS MAPCH,0 ; GET STATUS BITS
LDB 0,[220600,,0]
CAIN 0,4 ; SKIP IF NOT FNF
FATAL MAJOR FILE NOT FOUND
POP P,0
SOS (P)
SOS (P) ; RETRY OPEN
POPJ P,
]
IFE ITS,[
OPSAV: MOVSI A,%GJSHT+%GJOLD ; BITS FOR GTJFN
HRROI B,SAVSTR ; STRING POINTER
SKIPE OPSYS
HRROI B,TSAVST
GTJFN
FATAL CANT FIND SAV FILE
MOVEM A,MAPJFN ; STORE THE JFN
MOVE B,[440000,,OF%RD+OF%EX+OF%THW+OF%DUD]
OPENF
FATAL CANT OPEN SAV FILE
POPJ P,
]
; OPMFIL IS USED TO OPEN A FILE ON MUDTMP. IT CAN OPEN EITHER A SAV OR FIXUP FILE
; AND THE VERSION NUMBER IS SPECIFIED. THE ARGUMENTS ARE
; NAM-1(P) HAS SIXBIT OF FILE NAME
; VER-1(P) HAS 0,,VERSION # FOR SAV FILE AND 1,,VERSION# FOR FIXUP FILE
; RETURNS LENGTH OF FILE IN SLEN AND
; OPXFIL IS A KLUDGE FOR GETTING SAV AND FIXUP FILES OFF OF THE MDLLIB
; DIRECTORY DURING THE CHANGEOVER TO PRE- AND POST- MUDSAV WORLDS
OPXFIL: MOVEI 0,1
MOVEM 0,WRT-1(P)
JRST OPMFIL+1
OPWFIL: SETOM WRT-1(P)
SKIPA
OPMFIL: SETZM WRT-1(P)
IFN ITS,[
HRRZ C,VER-1(P) ; GET VERSION NUMBER
PUSHJ P,NTOSIX ; CONVERT TO SIXBIT
HRLI C,(SIXBIT /SAV/) ; BUILD SECOND FILE NAME
HLRZ 0,VER-1(P)
SKIPE 0 ; SKIP IF SAV
HRLI C,(SIXBIT/FIX/)
MOVE B,NAM-1(P) ; GET NAME
MOVSI A,7 ; WRITE MODE
SKIPL WRT-1(P)
MOVSI A,6 ; READ MODE
RETOPN: .CALL FOPBLK
JRST OPCHK ; SEE IF FIXUP IS NECESSARY OR JUST REOPENING
DOTCAL FILLEN,[[1000,,MAPCH],[2000,,A]]
.LOSE 1000
ADDI A,PGMSK ; ROUND
ASH A,-PGSHFT ; TO PAGES
MOVEM A,FLEN-1(P)
SETZM SPAG-1(P)
AOS (P) ; SKIP RETURN TO SHOW SUCCESS
POPJ P,
OPCHK: .STATUS MAPCH,0 ; GET STATUS BITS
LDB 0,[220600,,0]
CAIE 0,4 ; SKIP IF FNF
JRST OPCHK1 ; RETRY
POPJ P,
OPCHK1: MOVEI 0,1 ; SLEEP FOR A WHILE
.SLEEP
JRST OPCHK
; NTOSIX GETS NUMBER IN C AND CONVERTS IT TO SIXBIT AND RETURNS RESULT IN C
NTOSIX: PUSH P,A ; SAVE A AND B
PUSH P,B
PUSH P,D
MOVE D,[220600,,C]
MOVEI A,(C) ; GET NUMBER
MOVEI C,0
IDIVI A,100. ; GET RESULT OF DIVISION
SKIPN A
JRST ALADD
ADDI A,20 ; CONVERT TO DIGIT
IDPB A,D
ALADD: MOVEI A,(B)
IDIVI A,10. ; GET TENS DIGIT
SKIPN C
SKIPE A ; IF BOTH 0 BLANK DIGIT
ADDI A,20
IDPB A,D
SKIPN C
SKIPE B
ADDI B,20
IDPB B,D
POP P,D
POP P,B
POP P,A
POPJ P,
]
IFE ITS,[
MOVE E,P ; save pdl base
MOVE B,NAM-1(E) ; GET FIRST NAME
PUSH P,C%0 ; [0]; slots for building strings
PUSH P,C%0 ; [0]
MOVE A,[440700,,1(E)]
MOVE C,[440600,,B]
; DUMP OUT SIXBIT NAME
MOVEI D,6
ILDB 0,C
JUMPE 0,.+4 ; violate cardinal ".+ rule"
ADDI 0,40 ; to ASCII
IDPB 0,A
SOJG D,.-4
MOVE 0,[ASCII / SAV/]
HLRZ C,VER-1(E) ; GET SAV/FIXUP FLAG
SKIPE C
MOVE 0,[ASCII / FIX/]
PUSH P,0
HRRZ C,VER-1(E) ; get ascii of vers no.
PUSHJ P,NTOSEV ; CONVERT TO STRING LEFT JUSTIFIED
PUSH P,C
MOVEI B,-1(P) ; point to it
HRLI B,260700
HRROI D,1(E) ; point to name
MOVEI A,1(P)
MOVSI 0,100000 ; INPUT FILE (GJ%OLD)
SKIPGE WRT-1(E)
MOVSI 0,400000 ; OUTPUT FILE (GJ%FOU)
PUSH P,0
PUSH P,[377777,,377777]
MOVE 0,[-1,,[ASCIZ /DSK/]]
SKIPN OPSYS
MOVE 0,[-1,,[ASCIZ /PS/]]
PUSH P,0
HRROI 0,[ASCIZ /MDL/]
SKIPLE WRT-1(E)
HRROI 0,[ASCIZ /MDLLIB/] ; USE MDLLIB FOR SPECIAL CASE
PUSH P,0
PUSH P,D
PUSH P,B
PUSH P,C%0 ; [0]
PUSH P,C%0 ; [0]
PUSH P,C%0 ; [0]
MOVEI B,0
MOVE D,4(E) ; save final version string
GTJFN
JRST OPMLOS ; FAILURE
MOVEM A,DIRCHN
MOVE B,[440000,,OF%RD+OF%EX]
SKIPGE WRT-1(E)
MOVE B,[440000,,OF%RD+OF%WR]
OPENF
FATAL OPENF FAILED
MOVE P,E ; flush crap
PUSH P,A
SIZEF ; get length
JRST MAPLOS
SKIPL WRT-1(E)
MOVEM C,FLEN-1(E) ; ONLY SAVE LENGTH FOR READ JFNS
SETZM SPAG-1(E)
; RESTORE STACK AND LEAVE
MOVE P,E
MOVE A,C ; NUMBER OF PAGES IN A, DAMN!
AOS (P)
POPJ P,
OPMLOS: MOVE P,E
POPJ P,
; CONVERT A NUMBER IN C TO AN ASCII STRING LEFT JUSTIFIED IN C
NTOSEV: PUSH P,A ; SAVE A AND B
PUSH P,B
PUSH P,D
MOVE D,[440700,,C]
MOVEI A,(C) ; GET NUMBER
MOVEI C,0
IDIVI A,100. ; GET RESULT OF DIVISION
JUMPE A,ALADD
ADDI A,60 ; CONVERT TO DIGIT
IDPB A,D
ALADD: MOVEI A,(B)
IDIVI A,10. ; GET TENS DIGIT
ADDI A,60
IDPB A,D
ALADD1: ADDI B,60
IDPB B,D
POP P,D
POP P,B
POP P,A
POPJ P,
]
; ROUTINE TO READ IN THE FIXUPS FROM DIRCHN OR MAPCH WORKS
; FOR FIXUP FILE OR FIXUPS IN A SEPERATE FILE AS LONG AS THE
; CHANNEL IS OPENED AND ACCESSED TO THE RIGHT PLACE
RFXUP:
IFN ITS,[
MOVE 0,[-2,,A] ; PREPARE TO READ VERSION AND LENGTH
.IOT MAPCH,0 ; READ IT IN
SKIPGE 0 ; SKIP IF NOT HIT EOF
FATAL BAD FIXUP FILE
MOVEI A,-2(A) ; COUNT FOR FIRST 2 WORDS
HRRM B,VER-1(P) ; SAVE VERSION #
.IOPUS MAPCH, ; PUSH THE MAPPING CHANNEL
SETOM PLODR
PUSHJ P,IBLOCK ; GET A UVECTOR OF APPROPRIATE SIZE
SETZM PLODR
.IOPOP MAPCH,
MOVE 0,$TUVEC
MOVEM 0,-1(TP) ; SAVE UVECTOR
MOVEM B,(TP)
MOVE A,B ; GET AOBJN POINTER TO UVECTOR FOR IOT
.IOT MAPCH,A ; GET FIXUPS
.CLOSE MAPCH,
POPJ P,
]
IFE ITS,[
MOVE A,DIRCHN
BIN ; GET LENGTH OF FIXUP
MOVE C,B
MOVE A,DIRCHN
BIN ; GET VERSION NUMBER
HRRM B,VER-1(P)
SETOM PLODR
MOVEI A,-2(C)
PUSHJ P,IBLOCK
SETZM PLODR
MOVSI 0,$TUVEC
MOVEM 0,-1(TP)
MOVEM B,(TP)
MOVE A,DIRCHN
HLRE C,B
; SKIPE OPSYS ; SKIP IF TOPS20 SINCE C MUST BE NEGETIVE
; MOVNS C ; C IS POSITIVE FOR TENEX ?????
HRLI B,444400
SIN
MOVE A,DIRCHN
CLOSF
FATAL CANT CLOSE FIXUP FILE
RLJFN
JFCL
POPJ P,
]
; ROUTINE TO READ IN THE CODE
RSAV: MOVE A,FLEN-1(P)
PUSHJ P,ALOPAG ; GET PAGES
JRST MAPLS2
MOVE E,SPAG-1(P)
IFN ITS,[
MOVN A,FLEN-1(P) ; build aobjn pointer
MOVSI A,(A)
HRRI A,(B)
MOVE B,A
HRRI 0,(E)
DOTCAL CORBLK,[[1000,,104000],[1000,,-1],A,[1000,,MAPCH],0]
.LOSE %LSSYS
.CLOSE MAPCH,
POPJ P,
]
IFE ITS,[
PUSH P,B ; SAVE PAGE #
MOVS A,DIRCHN ; SOURCE (MUDSAV)
HLRM A,SJFNS ; SAVE POINTER FOR FUTURE CLOSING
HRR A,E
HRLI B,.FHSLF ; DESTINATION (FORK)
MOVSI C,PM%RD+PM%CPY ; MAKE COPY ON WRITE
SKIPE OPSYS
JRST RSAV1 ; HANDLE TENEX
TLO C,PM%CNT ; REPEAT COUNT BIT FOR TOPS20
HRR C,FLEN-2(P) ; PAGE (FOR PUSHJ AND PUSHED B)
PMAP
RSAVDN: POP P,B
MOVN 0,FLEN-1(P)
HRL B,0
POPJ P,
RSAV1: HRRZ D,FLEN-2(P) ; GET IN PAGE COUNT
RSAV2: PMAP
ADDI A,1 ; NEXT PAGE
ADDI B,1
SOJN D,RSAV2 ; LOOP
JRST RSAVDN
]
PDLOV: SUB P,[NSLOTS,,NSLOTS]
PUSH P,C%0 ; [0]; CAUSE A PDL OVERFLOW
JRST .-1
; CONSTANTS RELATED TO DATA BASE
DEV: SIXBIT /DSK/
MODE: 6,,0
MNDIR: SIXBIT /MUDSAV/ ; DIR OF MAIN DATA BASE FILES
WRKDIR: SIXBIT /MUDTMP/ ; DIRECTORY OF UPDATE FILES
IFN ITS,[
MNBLK: SETZ
SIXBIT /OPEN/
MODE
DEV
[SIXBIT /SAV/]
[SIXBIT /FILE/]
SETZ MNDIR
FIXBLK: SETZ
SIXBIT /OPEN/
MODE
DEV
[SIXBIT /FIXUP/]
[SIXBIT /FILE/]
SETZ MNDIR
FOPBLK: SETZ
SIXBIT /OPEN/
A
DEV
B
C
SETZ WRKDIR
FXTBL: -2,,.+1
55.
54.
]
IFE ITS,[
FXSTR: ASCIZ /PS:<MDL>FIXUP.FILE/
SAVSTR: ASCIZ /PS:<MDL>SAV.FILE/
TFXSTR: ASCIZ /DSK:<MDL>FIXUP.FILE/
TSAVST: ASCIZ /DSK:<MDL>SAV.FILE/
FXTBL: -3,,.+1
55.
54.
104.
]
IFN SPCFXU,[
;This code does two things to code for FBIN;
; 1) Makes dispatches win in multi seg mode
; 2) Makes OBLIST? work with "new" atom format
; 3) Makes LENGTH win in multi seg mode
; 4) Gets AOBJN pointer to code vector in C
SFIX: PUSH P,A
PUSH P,B
PUSH P,C ; for referring back
SFIX1: MOVSI B,-MLNT ; for looping through tables
SFIX2: MOVE A,(C) ; get code word
AND A,SMSKS(B)
CAMN A,SPECS(B) ; do we match
JRST @SFIXR(B)
AOBJN B,SFIX2
SFIX3: AOBJN C,SFIX1 ; do all of code
SFIX4: POP P,C
POP P,B
POP P,A
POPJ P,
SMSKS: -1
777000,,-1
-1,,0
777037,,0
MLNT==.-SMSKS
SPECS: HLRES A ; begin of arg diaptch table
SKIPN 2 ; old compiled OBLIST?
JRST (M) ; compiled LENGTH
ADDI (M) ; begin a case dispatch
SFIXR: SETZ DFIX
SETZ OBLFIX
SETZ LFIX
SETZ CFIX
DFIX: AOBJP C,SFIX4 ; make sure dont run out
MOVE A,(C) ; next ins
CAME A,[ASH A,-1] ; still winning?
JRST SFIX3 ; false alarm
AOBJP C,SFIX4 ; make sure dont run out
HLRZ A,(C) ; next ins
CAIE A,(ADDI A,(M)) ; still winning?
JRST SFIX3 ; false alarm
AOBJP C,SFIX4
HLRZ A,(C)
CAIE A,(PUSHJ P,@(A)) ; last one to check
JRST SFIX3
AOBJP C,SFIX4
MOVE A,(C)
CAME A,[JRST FINIS] ; extra check
JRST SFIX3
MOVSI B,(SETZ)
SFIX5: AOBJP C,SFIX4
HLRZ A,(C)
CAIN A,(SUBM M,(P))
JRST SFIX3
CAIE A,M ; dispatch entry?
JRST SFIX3 ; maybe already fixed
IORM B,(C) ; fix it
JRST SFIX5
OBLFIX: PUSH P,[-TLN,,TPTR]
PUSH P,C
MOVE B,-1(P)
OBLFXY: PUSH P,1(B)
PUSH P,(B)
OBLFI1: AOBJP C,OBLFXX
MOVE A,(C)
AOS B,(P)
AND A,(B)
MOVE B,-1(P)
CAME A,(B)
JRST OBLFXX
AOBJP B,DOOBFX
MOVEM B,-1(P)
JRST OBLFI1
OBLFXX: SUB P,C%22 ; for checking more ins
MOVE B,-1(P)
ADD B,C%22
JUMPGE B,OBLFX1
MOVEM B,-1(P)
MOVE C,(P)
JRST OBLFXY
INSBP==331100 ; byte pointer for ins field
ACBP==270400 ; also for ac
INDXBP==220400
DOOBFX: MOVE C,-2(P)
SUB P,C%44
MOVEI B,<<(HRRZ)>_<-9>> ; change em
DPB B,[INSBP,,(C)] ; SKIPN==>HRRZ
LDB A,[ACBP,,(C)] ; get AC field
MOVEI B,<<(JUMPE)>_<-9>>
DPB B,[INSBP,,1(C)]
DPB A,[ACBP,,1(C)]
AOS 1(C) ; JRST FOO==>JUMPE ac,FOO+1
MOVE B,[CAMG VECBOT]
DPB A,[ACBP,,B]
MOVEM B,2(C) ; JUMPL ==> CAMG ac,VECBOT
HRRZ A,3(C) ; get indicator of existence of ADD AC,TVP
CAIE A,TVP ; skip if extra ins exists
JRST NOATVP
MOVSI A,(JFCL)
EXCH A,4(C)
MOVEM A,3(C)
ADD C,C%11
NOATVP: TLC B,(CAMG#HRLI) ; change CAMG to HRLI (preserving AC)
HRRZ A,4(C) ; see if moves in type
CAIE A,$TOBLS
SUB C,[1,,1] ; fudge it
HLLOM B,5(C) ; in goes HRLI -1
CAIE A,$TOBLS ; do we need a skip?
JRST NOOB$
MOVSI B,(CAIA) ; skipper
EXCH B,6(C)
MOVEM B,7(C)
ADD C,[7,,7]
JRST SFIX3
NOOB$: MOVSI B,(JFCL)
MOVEM B,6(C)
ADD C,C%66
JRST SFIX3
OBLFX1: MOVE C,(P)
SUB P,C%22
JRST SFIX3
; Here to fixup compiled LENGTH
LFIX: MOVSI B,-LLN ; for checking other LENGTH ins
PUSH P,C
LFIX1: AOBJP C,LFIXY
MOVE A,(C)
AND A,LMSK(B)
CAME A,LINS(B)
JRST LFIXY
AOBJN B,LFIX1
POP P,C ; restore code pointer
MOVE A,(C) ; save jump for its addr
MOVE B,[MOVSI 400000]
MOVEM B,(C) ; JRST .+2 ==> MOVSI 0,400000
LDB B,[ACBP,,1(C)] ; B==> AC of interest
ADDI A,2
DPB B,[ACBP,,A]
MOVEI B,<<(JUMPE)>_<-9.>>
DPB B,[INSBP,,A]
EXCH A,1(C)
TLC A,(HRR#HRRZ) ; HRR==>HRRZ
HLLZM A,2(C) ; TRNN AC,-1 ==> HRRZ AC,(AC)
MOVEI B,(AOBJN (M))
HRLM B,3(C) ; AOBJP AC,.-2 ==> AOBJN 0,.-2
MOVE B,2(C) ; get HRRZ AC,(AC)
TLZ B,17 ; kill (AC) part
MOVEM B,4(C) ; HLRZS AC ==> HRRZ AC,0
ADD C,C%44
JRST SFIX3
LFIXY: POP P,C
JRST SFIX3
; Fixup a CASE dispatch
CFIX: LDB A,[ACBP,,(C)]
AOBJP C,SFIX4
HLRZ B,(C) ; Next ins
ANDI B,777760
CAIE B,(JRST @)
JRST SFIX3
LDB B,[INDXBP,,(C)]
CAIE A,(B)
JRST SFIX3
MOVE A,(C) ; ok, fix it up
TLZ A,20 ; kill indirection
MOVEM A,(C)
HRRZ B,-1(C) ; point to table
ADD B,(P) ; point to code to change
CFIXLP: HLRZ A,(B) ; check one out
TRZ A,400000 ; kill bit
CAIE A,M ; check for just index (or index with SETZ)
JRST SFIX3
MOVEI A,(JRST (M))
HRLM A,(B)
AOJA B,CFIXLP
DEFINE FOO LBL,LNT,LBL2,L
LBL:
IRP A,,[L]
IRP B,C,[A]
B
.ISTOP
TERMIN
TERMIN
LNT==.-LBL
LBL2:
IRP A,,[L]
IRP B,C,[A]
C
.ISTOP
TERMIN
TERMIN
TERMIN
IMSK==777017,,0
AIMSK==777000,,-1
FOO OINS,OLN,OMSK,[[<JRST (M)>,IMSK],[<JUMPL (M)>,IMSK],[MOVE,AIMSK]
[<MOVE $TOBLS>,AIMSK],[<JRST (M)>,IMSK]
[<MOVE $TFALSE>,AIMSK],[MOVEI,AIMSK]]
FOO OINS3,OLN3,OMSK3,[[<JRST (M)>,IMSK],[<JUMPL (M)>,IMSK],[MOVE,AIMSK]
[<JRST (M)>,IMSK],[MOVEI,AIMSK]]
FOO OINS2,OLN2,OMSK2,[[<JRST (M)>,IMSK],[<JUMPL (M)>,IMSK],[<ADD TVP>,AIMSK]
[MOVE,AIMSK],[<MOVE $TOBLS>,AIMSK],[<JRST (M)>,IMSK]
[<MOVE $TFALSE>,AIMSK],[MOVEI,AIMSK]]
FOO OINS4,OLN4,OMSK4,[[<JRST (M)>,IMSK],[<JUMPL (M)>,IMSK],[<ADD TVP>,AIMSK]
[MOVE,AIMSK],[<JRST (M)>,IMSK],[MOVEI,AIMSK]]
TPTR: -OLN,,OINS
OMSK-1
-OLN2,,OINS2
OMSK2-1
-OLN3,,OINS3
OMSK3-1
-OLN4,,OINS4
OMSK4-1
TLN==.-TPTR
FOO LINS,LLN,LMSK,[[<HRR -1>,AIMSK],[<TRNE -1>,AIMSK],[<AOBJP (M)>,IMSK]
[<HLRZS>,<-1,,777760>]]
]
IMPURE
SAVSNM: 0 ; SAVED SNAME
INPLOD: 0 ; FLAG SAYING WE ARE IN MAPPUR
IFE ITS,[
MAPJFN: 0 ; JFN OF <MDL>SAV FILE
DIRCHN: 0 ; JFN USED BY GETDIR
]
PURE
END
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